From 9b2a760339b41971b34822a5230259706496fedb Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wewigham@microsoft.com>
Date: Fri, 10 Nov 2017 15:49:51 -0800
Subject: [PATCH] Cherrypick non-comparability related changes from prolific
 literals PR

---
 src/compiler/checker.ts                       |  35 ++-
 ...ionAndExportedFunctionThatShareAName.types |   4 +-
 ...AndNonExportedFunctionThatShareAName.types |   4 +-
 ...VariableAndExportedVarThatShareAName.types |   4 +-
 ...iableAndNonExportedVarThatShareAName.types |   4 +-
 tests/baselines/reference/ES5For-of30.types   |   2 +-
 .../reference/ES5For-ofTypeCheck3.types       |   2 +-
 tests/baselines/reference/ES5for-of32.types   |   4 +-
 ...assHeritageListMemberTypeAnnotations.types |   4 +-
 ...essibleTypeInTypeParameterConstraint.types |   4 +-
 ...esInParameterAndReturnTypeAnnotation.types |   2 +-
 ...ssibleTypesInParameterTypeAnnotation.types |   2 +-
 ...ccessibleTypesInReturnTypeAnnotation.types |   2 +-
 ...assHeritageListMemberTypeAnnotations.types |   4 +-
 ...essibleTypeInTypeParameterConstraint.types |   4 +-
 ...hAccessibleTypesOnItsExportedMembers.types |   2 +-
 ...cessibleTypesInMemberTypeAnnotations.types |   2 +-
 ...leWithAccessibleTypeInTypeAnnotation.types |   2 +-
 ...WithInaccessibleTypeInTypeAnnotation.types |   4 +-
 ...ithExportedAndNonExportedImportAlias.types |   4 +-
 ...AndNonExportedLocalVarsOfTheSameName.types |   4 +-
 ...chWithExportedLocalVarsOfTheSameName.types |   2 +-
 ...ithTheSameNameAndDifferentCommonRoot.types |   2 +-
 ...ulesWithTheSameNameAndSameCommonRoot.types |   4 +-
 .../accessorsAreNotContextuallyTyped.types    |   2 +-
 .../allowImportClausesToMergeWithTypes.types  |   4 +-
 .../argumentExpressionContextualTyping.types  |  14 +-
 .../reference/arrayBestCommonTypes.types      |  20 +-
 tests/baselines/reference/arrayLiteral.types  |   4 +-
 ...teralExpressionContextualTyping.errors.txt |  12 +-
 ...rayLiteralExpressionContextualTyping.types |   6 +-
 .../arrayLiteralTypeInference.errors.txt      |  24 +-
 .../reference/arrayLiteralTypeInference.types |  12 +-
 .../reference/arrayLiterals.errors.txt        |  12 +-
 tests/baselines/reference/arrayLiterals.types |   6 +-
 .../reference/arrayLiterals2ES5.types         |  12 +-
 .../reference/arrayLiterals2ES6.types         |  12 +-
 .../reference/arrayLiterals3.errors.txt       |  12 +-
 .../baselines/reference/arrayLiterals3.types  |  10 +-
 .../reference/arrowFunctionExpressions.types  |   6 +-
 .../arrowFunctionWithObjectLiteralBody5.types |   8 +-
 .../arrowFunctionWithObjectLiteralBody6.types |   8 +-
 tests/baselines/reference/assign1.types       |   2 +-
 .../reference/assignmentCompatBug2.errors.txt |  28 +-
 .../reference/assignmentCompatBug2.types      |  60 ++---
 ...CompatFunctionsWithOptionalArgs.errors.txt |  12 +-
 ...nmentCompatFunctionsWithOptionalArgs.types |   4 +-
 ...CallSignaturesWithOptionalParameters.types |  64 ++---
 ...allSignaturesWithRestParameters.errors.txt |  36 +--
 ...WithCallSignaturesWithRestParameters.types | 112 ++++----
 .../assignmentCompatWithObjectMembers3.types  |   4 +-
 .../reference/assignmentCompatability1.types  |   2 +-
 .../reference/assignmentCompatability10.types |   2 +-
 .../reference/assignmentCompatability11.types |   2 +-
 .../reference/assignmentCompatability12.types |   2 +-
 .../reference/assignmentCompatability13.types |   2 +-
 .../reference/assignmentCompatability14.types |   2 +-
 .../reference/assignmentCompatability15.types |   2 +-
 .../reference/assignmentCompatability16.types |   2 +-
 .../reference/assignmentCompatability17.types |   2 +-
 .../reference/assignmentCompatability18.types |   2 +-
 .../reference/assignmentCompatability19.types |   2 +-
 .../reference/assignmentCompatability2.types  |   2 +-
 .../reference/assignmentCompatability20.types |   2 +-
 .../reference/assignmentCompatability21.types |   2 +-
 .../reference/assignmentCompatability22.types |   2 +-
 .../reference/assignmentCompatability23.types |   2 +-
 .../reference/assignmentCompatability24.types |   2 +-
 .../reference/assignmentCompatability25.types |   2 +-
 .../reference/assignmentCompatability26.types |   2 +-
 .../reference/assignmentCompatability27.types |   2 +-
 .../reference/assignmentCompatability28.types |   2 +-
 .../reference/assignmentCompatability29.types |   2 +-
 .../reference/assignmentCompatability3.types  |   2 +-
 .../reference/assignmentCompatability30.types |   2 +-
 .../reference/assignmentCompatability31.types |   2 +-
 .../reference/assignmentCompatability32.types |   2 +-
 .../reference/assignmentCompatability33.types |   2 +-
 .../reference/assignmentCompatability34.types |   2 +-
 .../reference/assignmentCompatability35.types |   2 +-
 .../reference/assignmentCompatability36.types |   2 +-
 .../reference/assignmentCompatability37.types |   2 +-
 .../reference/assignmentCompatability38.types |   2 +-
 .../reference/assignmentCompatability39.types |   2 +-
 .../reference/assignmentCompatability4.types  |   2 +-
 .../reference/assignmentCompatability40.types |   2 +-
 .../reference/assignmentCompatability41.types |   2 +-
 .../reference/assignmentCompatability42.types |   2 +-
 .../reference/assignmentCompatability43.types |   4 +-
 .../reference/assignmentCompatability5.types  |   4 +-
 .../reference/assignmentCompatability6.types  |   2 +-
 .../reference/assignmentCompatability7.types  |   4 +-
 .../reference/assignmentCompatability8.types  |   2 +-
 .../reference/assignmentCompatability9.types  |   2 +-
 .../assignmentToObjectAndFunction.types       |   4 +-
 ...assignmentToParenthesizedIdentifiers.types |  12 +-
 .../reference/asyncFunctionReturnType.types   |   2 +-
 .../reference/bestCommonTypeOfTuple.types     |   8 +-
 .../bitwiseNotOperatorWithNumberType.types    |   2 +-
 .../bitwiseNotOperatorWithStringType.types    |   2 +-
 tests/baselines/reference/castTest.types      |   4 +-
 tests/baselines/reference/castingTuple.types  |   8 +-
 .../checkJsdocTypedefInParamTag1.types        |   6 +-
 .../computedPropertiesInDestructuring1.types  |   6 +-
 ...mputedPropertiesInDestructuring1_ES6.types |   6 +-
 .../computedPropertyNames48_ES5.types         |   6 +-
 .../computedPropertyNames48_ES6.types         |   6 +-
 ...opertyNamesContextualType10_ES5.errors.txt |  12 +-
 ...tedPropertyNamesContextualType10_ES5.types |   2 +-
 ...opertyNamesContextualType10_ES6.errors.txt |  12 +-
 ...tedPropertyNamesContextualType10_ES6.types |   2 +-
 ...utedPropertyNamesContextualType6_ES5.types |   4 +-
 ...utedPropertyNamesContextualType6_ES6.types |   4 +-
 ...utedPropertyNamesContextualType7_ES5.types |   6 +-
 ...utedPropertyNamesContextualType7_ES6.types |   6 +-
 ...ropertyNamesContextualType8_ES5.errors.txt |  12 +-
 ...utedPropertyNamesContextualType8_ES5.types |   2 +-
 ...ropertyNamesContextualType8_ES6.errors.txt |  12 +-
 ...utedPropertyNamesContextualType8_ES6.types |   2 +-
 ...ropertyNamesContextualType9_ES5.errors.txt |  12 +-
 ...utedPropertyNamesContextualType9_ES5.types |   2 +-
 ...ropertyNamesContextualType9_ES6.errors.txt |  12 +-
 ...utedPropertyNamesContextualType9_ES6.types |   2 +-
 tests/baselines/reference/concatError.types   |   2 +-
 tests/baselines/reference/concatTuples.types  |  10 +-
 ...ructorWithAssignableReturnExpression.types |   2 +-
 ...structorWithIncompleteTypeAnnotation.types |   2 +-
 .../reference/contextualTypeFromJSDoc.types   |  30 +--
 .../reference/contextualTypeLogicalOr.types   |  48 ++--
 .../contextualTypeShouldBeLiteral.js          | 136 ++++++++++
 .../contextualTypeShouldBeLiteral.symbols     | 229 ++++++++++++++++
 .../contextualTypeShouldBeLiteral.types       | 248 ++++++++++++++++++
 .../contextualTypeWithTuple.errors.txt        |  16 +-
 .../reference/contextualTypeWithTuple.types   |  28 +-
 ...tualTypeWithUnionTypeIndexSignatures.types |   4 +-
 .../contextualTypeWithUnionTypeMembers.types  |  22 +-
 .../reference/contextualTyping.types          |  20 +-
 .../reference/contextualTyping1.types         |   2 +-
 .../reference/contextualTyping10.types        |   6 +-
 .../reference/contextualTyping12.errors.txt   |  12 +-
 .../reference/contextualTyping12.types        |   6 +-
 .../reference/contextualTyping16.types        |   6 +-
 .../reference/contextualTyping17.errors.txt   |   4 +-
 .../reference/contextualTyping17.types        |   6 +-
 .../reference/contextualTyping18.types        |   4 +-
 .../reference/contextualTyping19.types        |  12 +-
 .../reference/contextualTyping2.errors.txt    |   4 +-
 .../reference/contextualTyping2.types         |   2 +-
 .../reference/contextualTyping20.errors.txt   |  12 +-
 .../reference/contextualTyping20.types        |  12 +-
 .../reference/contextualTyping21.errors.txt   |   8 +-
 .../reference/contextualTyping21.types        |  10 +-
 .../reference/contextualTyping23.types        |   4 +-
 .../reference/contextualTyping24.errors.txt   |   4 +-
 .../reference/contextualTyping24.types        |   4 +-
 .../reference/contextualTyping28.types        |   2 +-
 .../reference/contextualTyping29.types        |   2 +-
 .../reference/contextualTyping3.types         |   2 +-
 .../reference/contextualTyping30.errors.txt   |   8 +-
 .../reference/contextualTyping31.types        |   2 +-
 .../reference/contextualTyping34.types        |   4 +-
 .../reference/contextualTyping35.types        |   2 +-
 .../reference/contextualTyping36.types        |   2 +-
 .../reference/contextualTyping4.errors.txt    |   4 +-
 .../reference/contextualTyping4.types         |   2 +-
 .../reference/contextualTyping6.types         |   6 +-
 .../reference/contextualTyping9.errors.txt    |  12 +-
 .../reference/contextualTyping9.types         |   6 +-
 .../contextualTypingOfOptionalMembers.types   |   6 +-
 .../contextuallyTypedBindingInitializer.types |   2 +-
 ...uallyTypedBindingInitializerNegative.types |   6 +-
 .../reference/contextuallyTypedIife.types     |  14 +-
 .../contextuallyTypedIifeStrict.types         |  14 +-
 .../contextuallyTypingOrOperator.types        |   6 +-
 .../contextuallyTypingOrOperator2.types       |   6 +-
 .../reference/controlFlowDeleteOperator.types |   2 +-
 .../controlFlowDestructuringDeclaration.types |  18 +-
 .../declarationEmitDestructuring2.js          |   4 +-
 .../declarationEmitDestructuring2.types       |   8 +-
 ...rationEmitDestructuringArrayPattern2.types |   8 +-
 .../declarationsAndAssignments.errors.txt     |  12 +-
 .../declarationsAndAssignments.types          |  50 ++--
 .../decrementOperatorWithNumberType.types     |   2 +-
 ...ratorWithNumberTypeInvalidOperations.types |   2 +-
 ...entOperatorWithUnsupportedStringType.types |   2 +-
 .../deleteOperatorWithNumberType.types        |   2 +-
 .../deleteOperatorWithStringType.types        |   2 +-
 .../baselines/reference/deleteReadonly.types  |   2 +-
 ...lassConstructorWithExplicitReturns01.types |   8 +-
 ...nBaseCallViaSuperPropertyAccess.errors.txt |   4 +-
 ...HiddenBaseCallViaSuperPropertyAccess.types |   4 +-
 .../destructureOptionalParameter.types        |   2 +-
 ...ArrayBindingPatternAndAssignment1ES5.types |   6 +-
 ...dingPatternAndAssignment1ES5iterable.types |   6 +-
 ...ArrayBindingPatternAndAssignment1ES6.types |   6 +-
 ...rayBindingPatternAndAssignment2.errors.txt |   8 +-
 ...ingArrayBindingPatternAndAssignment2.types |   6 +-
 ...ingArrayBindingPatternAndAssignment3.types |   6 +-
 ...bjectBindingPatternAndAssignment1ES5.types |   8 +-
 ...bjectBindingPatternAndAssignment1ES6.types |   8 +-
 ...cturingParameterDeclaration1ES5.errors.txt |   4 +-
 ...estructuringParameterDeclaration1ES5.types |  18 +-
 ...arameterDeclaration1ES5iterable.errors.txt |   4 +-
 ...ringParameterDeclaration1ES5iterable.types |  18 +-
 ...cturingParameterDeclaration1ES6.errors.txt |   4 +-
 ...estructuringParameterDeclaration1ES6.types |  18 +-
 ...tructuringParameterDeclaration2.errors.txt |   8 +-
 .../destructuringParameterDeclaration2.types  |   2 +-
 ...estructuringParameterDeclaration3ES5.types |   2 +-
 ...ringParameterDeclaration3ES5iterable.types |   2 +-
 ...estructuringParameterDeclaration3ES6.types |   2 +-
 ...tructuringParameterDeclaration4.errors.txt |   8 +-
 .../destructuringParameterProperties1.types   |   8 +-
 ...structuringParameterProperties2.errors.txt |   8 +-
 .../destructuringParameterProperties2.types   |   4 +-
 .../destructuringParameterProperties3.types   |   6 +-
 .../destructuringTypeGuardFlow.types          |   6 +-
 ...destructuringVariableDeclaration1ES5.types |  40 +--
 ...uringVariableDeclaration1ES5iterable.types |  40 +--
 ...destructuringVariableDeclaration1ES6.types |  40 +--
 ...structuringVariableDeclaration2.errors.txt |   4 +-
 .../destructuringVariableDeclaration2.types   |  14 +-
 ...destructuringWithLiteralInitializers.types |  46 ++--
 ...denAtObjectLiteralPropertyAssignment.types |   8 +-
 .../doubleUnderscoreMappedTypes.types         |   4 +-
 ...tLiteralExpressionInArrowFunctionES5.types |   4 +-
 ...tLiteralExpressionInArrowFunctionES6.types |   4 +-
 .../reference/emitArrowFunctionES6.types      |   6 +-
 ...itCapturingThisInTupleDestructuring2.types |   2 +-
 .../errorMessagesIntersectionTypes01.types    |   2 +-
 .../errorMessagesIntersectionTypes02.types    |   2 +-
 .../reference/escapedIdentifiers.types        |   8 +-
 ...veryTypeWithAnnotationAndInitializer.types |   6 +-
 .../excessPropertyCheckWithUnions.errors.txt  |  16 +-
 .../excessPropertyCheckWithUnions.types       |  28 +-
 ...ssPropertyErrorForFunctionTypes.errors.txt |   4 +-
 .../excessPropertyErrorForFunctionTypes.types |   2 +-
 .../excessPropertyErrorsSuppressed.types      |   2 +-
 ...portAssignmentConstrainedGenericType.types |  16 +-
 .../exportImportNonInstantiatedModule.types   |   2 +-
 .../exportImportNonInstantiatedModule2.types  |   2 +-
 .../reference/exportNonVisibleType.types      |   2 +-
 ...backToBindingPatternForTypeInference.types |   6 +-
 tests/baselines/reference/for-of36.types      |   2 +-
 tests/baselines/reference/for-of37.types      |   4 +-
 tests/baselines/reference/for-of38.types      |   4 +-
 tests/baselines/reference/for-of39.errors.txt |  32 +--
 tests/baselines/reference/for-of40.types      |   4 +-
 tests/baselines/reference/for-of43.types      |   2 +-
 tests/baselines/reference/for-of44.types      |   8 +-
 tests/baselines/reference/for-of45.types      |   4 +-
 tests/baselines/reference/for-of46.types      |   4 +-
 tests/baselines/reference/for-of49.types      |   4 +-
 tests/baselines/reference/for-of50.types      |   4 +-
 tests/baselines/reference/forStatements.types |   6 +-
 .../forStatementsMultipleValidDecl.types      |   6 +-
 .../reference/functionAssignment.types        |   2 +-
 .../reference/functionAssignmentError.types   |   4 +-
 .../functionExpressionContextualTyping1.types |  12 +-
 .../reference/functionOverloads17.types       |   2 +-
 .../reference/functionOverloads35.types       |   2 +-
 .../reference/functionOverloads36.types       |   2 +-
 .../reference/functionOverloads38.types       |   4 +-
 .../reference/functionOverloads40.errors.txt  |  12 +-
 .../reference/functionOverloads43.types       |   8 +-
 .../reference/functionOverloads44.types       |  16 +-
 .../reference/functionOverloads45.types       |  16 +-
 tests/baselines/reference/fuzzy.errors.txt    |   4 +-
 tests/baselines/reference/fuzzy.types         |   6 +-
 .../genericCallWithArrayLiteralArgs.types     |   6 +-
 ...enericCallWithFunctionTypedArguments.types |   6 +-
 ...enericCallWithObjectLiteralArgs.errors.txt |   4 +-
 .../genericCallWithObjectLiteralArgs.types    |   2 +-
 ...CallWithObjectLiteralArguments1.errors.txt |  20 +-
 ...allWithObjectTypeArgsAndConstraints4.types |   2 +-
 .../genericCallWithTupleType.errors.txt       |   4 +-
 .../reference/genericCallWithTupleType.types  |   8 +-
 ...lassWithFunctionTypedMemberArguments.types |  12 +-
 ...enericFunctionTypedArgumentsAreFixed.types |   2 +-
 .../reference/genericTypeAliases.types        |  38 +--
 .../heterogeneousArrayAndOverloads.errors.txt |   8 +-
 .../heterogeneousArrayAndOverloads.types      |   4 +-
 ...yFunctionInvocationWithAnyArguements.types |   2 +-
 .../reference/implicitIndexSignatures.types   |   4 +-
 .../reference/importAliasIdentifiers.types    |   4 +-
 .../incrementOperatorWithNumberType.types     |   2 +-
 ...ratorWithNumberTypeInvalidOperations.types |   2 +-
 ...entOperatorWithUnsupportedStringType.types |   2 +-
 .../indexSignaturesInferentialTyping.types    |   6 +-
 tests/baselines/reference/indexer.types       |   6 +-
 tests/baselines/reference/indexerA.types      |   6 +-
 .../reference/indexerWithTuple.types          |  10 +-
 .../indirectTypeParameterReferences.types     |   2 +-
 ...inferentialTypingWithFunctionTypeZip.types |   2 +-
 ...ialTypingWithObjectLiteralProperties.types |  12 +-
 tests/baselines/reference/inheritance.types   |   2 +-
 ...nstanceMemberAssignsToClassPrototype.types |   4 +-
 .../reference/instantiatedModule.types        |   2 +-
 tests/baselines/reference/interface0.types    |   2 +-
 .../reference/interfaceAssignmentCompat.types |  12 +-
 .../interfaceDoesNotDependOnBaseTypes.types   |   2 +-
 .../reference/interfaceImplementation6.types  |   2 +-
 .../interfaceWithPropertyOfEveryType.types    |  10 +-
 .../reference/intersectionThisTypes.types     |   4 +-
 .../reference/intersectionTypeInference.types |   6 +-
 .../intersectionTypeInference1.types          |   2 +-
 .../reference/intersectionTypeMembers.types   |  18 +-
 .../invalidReturnStatements.errors.txt        |   8 +-
 .../reference/invalidReturnStatements.types   |   2 +-
 .../isomorphicMappedTypeInference.types       |   4 +-
 .../reference/iterableArrayPattern23.types    |   4 +-
 .../reference/iterableArrayPattern25.types    |   6 +-
 .../reference/iterableArrayPattern26.types    |   6 +-
 .../reference/iterableArrayPattern27.types    |   6 +-
 .../iterableArrayPattern28.errors.txt         |  28 +-
 .../reference/iterableArrayPattern29.types    |   6 +-
 .../reference/iterableArrayPattern30.types    |   6 +-
 .../iteratorSpreadInArray5.errors.txt         |   8 +-
 .../reference/iteratorSpreadInArray5.types    |   2 +-
 .../reference/iteratorSpreadInArray6.types    |   2 +-
 .../jsdocDisallowedInTypescript.types         |   2 +-
 .../reference/jsdocParamTagTypeLiteral.types  |  26 +-
 .../baselines/reference/json.stringify.types  |   2 +-
 .../reference/keyofAndIndexedAccess.types     |  60 ++---
 .../keyofIsLiteralContexualType.types         |   2 +-
 .../reference/lambdaParamTypes.types          |   6 +-
 tests/baselines/reference/literalTypes2.types |   4 +-
 .../literalTypesAndTypeAssertions.types       |   4 +-
 .../logicalNotOperatorWithNumberType.types    |   2 +-
 .../logicalNotOperatorWithStringType.types    |   2 +-
 ...OrExpressionIsContextuallyTyped.errors.txt |   8 +-
 ...gicalOrExpressionIsContextuallyTyped.types |   6 +-
 .../logicalOrOperatorWithTypeParameters.types |   6 +-
 .../reference/looseThisTypeInFunctions.types  |   2 +-
 .../reference/mapOnTupleTypes01.types         |  16 +-
 .../reference/mappedTypeErrors.errors.txt     |  16 +-
 .../reference/mappedTypeErrors.types          |  30 +--
 .../mappedTypeInferenceErrors.errors.txt      |   8 +-
 ...mappedTypeNestedGenericInstantiation.types |   2 +-
 tests/baselines/reference/mappedTypes2.types  |   4 +-
 .../matchingOfObjectLiteralConstraints.types  |   2 +-
 ...citTypeParameterAndArgumentType.errors.txt |   8 +-
 ...ExplicitTypeParameterAndArgumentType.types |   2 +-
 .../missingAndExcessProperties.types          |  18 +-
 .../reference/multipleInheritance.types       |   2 +-
 .../reference/multipleNumericIndexers.types   |   2 +-
 .../reference/multipleStringIndexers.types    |   2 +-
 .../negateOperatorWithNumberType.types        |   2 +-
 .../negateOperatorWithStringType.types        |   2 +-
 tests/baselines/reference/nestedLoops.types   |   4 +-
 tests/baselines/reference/nestedModules.types |   2 +-
 .../nestedTypeVariableInfersLiteral.js        |  31 +++
 .../nestedTypeVariableInfersLiteral.symbols   |  78 ++++++
 .../nestedTypeVariableInfersLiteral.types     | 100 +++++++
 .../baselines/reference/neverInference.types  |   4 +-
 tests/baselines/reference/neverType.types     |   2 +-
 .../reference/noCrashOnImportShadowing.types  |   4 +-
 ...licitAnyDestructuringVarDeclaration2.types |   4 +-
 .../noImplicitAnyInCastExpression.types       |   2 +-
 .../reference/noImplicitAnyIndexing.types     |   2 +-
 .../noImplicitAnyIndexingSuppressed.types     |   2 +-
 .../reference/nonInstantiatedModule.types     |   2 +-
 tests/baselines/reference/null.types          |   2 +-
 ...rConstrainsPropertyDeclarations.errors.txt |   4 +-
 ...ndexerConstrainsPropertyDeclarations.types |   2 +-
 .../reference/numericIndexingResults.types    |   4 +-
 tests/baselines/reference/objectFreeze.types  |   4 +-
 .../objectLitTargetTypeCallSite.errors.txt    |   4 +-
 .../objectLiteralArraySpecialization.types    |   6 +-
 .../objectLiteralContextualTyping.types       |   4 +-
 .../objectLiteralEnumPropertyNames.types      |  10 +-
 .../objectLiteralExcessProperties.errors.txt  |  28 +-
 .../objectLiteralExcessProperties.types       |  12 +-
 ...eralFunctionArgContextualTyping.errors.txt |   4 +-
 ...ctLiteralFunctionArgContextualTyping.types |   4 +-
 ...ralFunctionArgContextualTyping2.errors.txt |  16 +-
 .../objectLiteralNormalization.errors.txt     |  48 ++--
 .../objectLiteralNormalization.types          |  40 +--
 .../objectLiteralParameterResolution.types    |   6 +-
 tests/baselines/reference/objectRest.types    |   6 +-
 .../baselines/reference/objectRestForOf.types |   4 +-
 .../reference/objectRestParameter.types       |   2 +-
 .../reference/objectRestParameterES5.types    |   2 +-
 tests/baselines/reference/objectSpread.types  |  40 +--
 .../reference/objectSpreadNegative.errors.txt |  12 +-
 .../reference/objectSpreadNegative.types      |  24 +-
 ...ectTypesIdentityWithNumericIndexers1.types |   2 +-
 ...ectTypesIdentityWithNumericIndexers3.types |   2 +-
 ...bjectTypesIdentityWithStringIndexers.types |   2 +-
 .../optionalBindingParameters1.errors.txt     |   4 +-
 .../optionalBindingParameters1.types          |   2 +-
 .../optionalBindingParameters2.errors.txt     |   4 +-
 .../optionalBindingParameters2.types          |   2 +-
 ...alBindingParametersInOverloads1.errors.txt |   4 +-
 ...ptionalBindingParametersInOverloads1.types |   2 +-
 ...alBindingParametersInOverloads2.errors.txt |   4 +-
 ...ptionalBindingParametersInOverloads2.types |   2 +-
 .../reference/optionalParamArgsTest.types     |   8 +-
 .../reference/optionalProperties01.types      |   4 +-
 .../optionalPropertiesTest.errors.txt         |   8 +-
 .../reference/optionalPropertiesTest.types    |  20 +-
 ...attersForSignatureGroupIdentity.errors.txt |   8 +-
 .../overloadOnConstAsTypeAnnotation.types     |   2 +-
 .../overloadOnConstNoAnyImplementation.types  |   6 +-
 ...loadOnConstNoAnyImplementation2.errors.txt |   8 +-
 .../overloadOnConstNoAnyImplementation2.types |   8 +-
 ...verloadOnConstNoStringImplementation.types |   6 +-
 ...dOnConstNoStringImplementation2.errors.txt |   8 +-
 ...erloadOnConstNoStringImplementation2.types |   8 +-
 ...overloadResolutionOverNonCTObjectLit.types |   6 +-
 .../overloadResolutionTest1.errors.txt        |  20 +-
 .../reference/overloadResolutionTest1.types   |   6 +-
 ...lbacksWithDifferingOptionalityOnArgs.types |   4 +-
 .../overloadsWithProvisionalErrors.types      |   6 +-
 .../overrideBaseIntersectionMethod.types      |   2 +-
 .../plusOperatorWithNumberType.types          |   2 +-
 .../plusOperatorWithStringType.types          |   2 +-
 .../reference/promiseVoidErrorCallback.types  |   2 +-
 .../reference/propertyAccess.errors.txt       |   4 +-
 .../baselines/reference/propertyAccess.types  |   2 +-
 .../baselines/reference/readonlyMembers.types |   4 +-
 .../reference/restArgAssignmentCompat.types   |   2 +-
 .../reference/restElementMustBeLast.types     |   4 +-
 ...stElementWithAssignmentPattern1.errors.txt |  16 +-
 .../restElementWithAssignmentPattern1.types   |   4 +-
 .../restElementWithAssignmentPattern3.types   |   2 +-
 .../restElementWithAssignmentPattern4.types   |   2 +-
 .../restElementWithAssignmentPattern5.types   |   4 +-
 .../reference/returnInConstructor1.types      |   2 +-
 .../reference/returnStatements.types          |   2 +-
 ...adowingViaLocalValueOrBindingElement.types |   4 +-
 ...ndPropertyAssignmentsInDestructuring.types |  42 +--
 ...opertyAssignmentsInDestructuring_ES6.types |  42 +--
 ...nDestructuringForArrayBindingPattern.types |  10 +-
 ...DestructuringForArrayBindingPattern2.types |  46 ++--
 ...gForArrayBindingPatternDefaultValues.types |  40 +--
 ...ForArrayBindingPatternDefaultValues2.types |  74 +++---
 ...DestructuringForObjectBindingPattern.types |  24 +-
 ...estructuringForObjectBindingPattern2.types |  40 +--
 ...ForObjectBindingPatternDefaultValues.types |  36 +--
 ...orObjectBindingPatternDefaultValues2.types | 136 +++++-----
 ...estructuringForOfArrayBindingPattern.types |  12 +-
 ...structuringForOfArrayBindingPattern2.types |  12 +-
 ...orOfArrayBindingPatternDefaultValues.types |  24 +-
 ...rOfArrayBindingPatternDefaultValues2.types |  48 ++--
 ...structuringForOfObjectBindingPattern.types |  20 +-
 ...tructuringForOfObjectBindingPattern2.types |  20 +-
 ...rOfObjectBindingPatternDefaultValues.types |  60 ++---
 ...OfObjectBindingPatternDefaultValues2.types | 120 ++++-----
 ...gParameterNestedObjectBindingPattern.types |  24 +-
 ...tedObjectBindingPatternDefaultValues.types |  30 +--
 ...cturingParameterObjectBindingPattern.types |   8 +-
 ...terObjectBindingPatternDefaultValues.types |   8 +-
 ...cturingParametertArrayBindingPattern.types |  10 +-
 ...turingParametertArrayBindingPattern2.types |  20 +-
 ...tertArrayBindingPatternDefaultValues.types |  18 +-
 ...ertArrayBindingPatternDefaultValues2.types |  26 +-
 ...dationDestructuringVariableStatement.types |   4 +-
 ...ationDestructuringVariableStatement1.types |   4 +-
 ...VariableStatementArrayBindingPattern.types |   4 +-
 ...ariableStatementArrayBindingPattern2.types |   8 +-
 ...ariableStatementArrayBindingPattern3.types |  50 ++--
 ...ariableStatementArrayBindingPattern6.types |   2 +-
 ...ariableStatementArrayBindingPattern7.types |   2 +-
 ...mentArrayBindingPatternDefaultValues.types |   8 +-
 ...entArrayBindingPatternDefaultValues2.types |  20 +-
 ...entArrayBindingPatternDefaultValues3.types |  38 +--
 ...turingVariableStatementDefaultValues.types |   6 +-
 ...eStatementNestedObjectBindingPattern.types |  12 +-
 ...bjectBindingPatternWithDefaultValues.types |  24 +-
 ...riableStatementObjectBindingPattern3.types |   2 +-
 ...riableStatementObjectBindingPattern4.types |   2 +-
 ...ializedSignatureAsCallbackParameter1.types |   4 +-
 tests/baselines/reference/spreadMethods.types |   2 +-
 .../reference/spreadTypeRemovesReadonly.types |   2 +-
 ...ymousTypeNotReferencingTypeParameter.types |   2 +-
 ...rAssignsToConstructorFunctionMembers.types |   4 +-
 ...rConstrainsPropertyDeclarations.errors.txt |   4 +-
 ...ndexerConstrainsPropertyDeclarations.types |   2 +-
 .../reference/stringIndexingResults.types     |   2 +-
 .../stringLiteralTypesAsTags01.types          |   2 +-
 .../stringLiteralTypesAsTags02.types          |   2 +-
 .../stringLiteralTypesAsTags03.types          |   2 +-
 tests/baselines/reference/structural1.types   |   2 +-
 .../reference/subtypeRelationForNever.types   |   2 +-
 .../reference/superPropertyAccess.types       |   4 +-
 .../reference/symbolProperty21.errors.txt     |   4 +-
 tests/baselines/reference/syntaxErrors.types  |   2 +-
 ...TemplateStringsTypeArgumentInference.types |  10 +-
 ...plateStringsTypeArgumentInferenceES6.types |  10 +-
 .../reference/targetTypeCastTest.types        |   2 +-
 .../reference/targetTypeObjectLiteral.types   |   6 +-
 .../baselines/reference/targetTypeTest1.types |   8 +-
 .../reference/targetTypeTest3.errors.txt      |   8 +-
 .../baselines/reference/targetTypeTest3.types |   2 +-
 .../thisTypeInAccessorsNegative.types         |   2 +-
 .../reference/thisTypeInFunctions.types       |  26 +-
 .../reference/thisTypeInFunctions2.types      |   4 +-
 .../thisTypeInFunctionsNegative.errors.txt    |  12 +-
 .../thisTypeInFunctionsNegative.types         |  18 +-
 .../reference/thisTypeInObjectLiterals2.types |  36 +--
 .../reference/thisTypeInTuples.types          |   2 +-
 ...ommaInHeterogenousArrayLiteral1.errors.txt |  12 +-
 ...sxInferenceShouldNotYieldAnyOnUnions.types |  14 +-
 .../tsxSpreadAttributesResolution11.types     |   6 +-
 .../tsxSpreadAttributesResolution12.types     |   2 +-
 .../tsxSpreadAttributesResolution4.types      |   2 +-
 ...xStatelessFunctionComponentOverload2.types |   4 +-
 ...FunctionComponentsWithTypeArguments1.types |   4 +-
 ...ionComponentsWithTypeArguments2.errors.txt |   8 +-
 ...FunctionComponentsWithTypeArguments2.types |   4 +-
 .../baselines/reference/tsxUnionSpread.types  |   4 +-
 .../baselines/reference/tupleTypes.errors.txt |  12 +-
 tests/baselines/reference/tupleTypes.types    |  20 +-
 tests/baselines/reference/typeAliases.types   |   2 +-
 ...notationBestCommonTypeInArrayLiteral.types |   6 +-
 .../reference/typeArgInference2.types         |  20 +-
 .../reference/typeArgInferenceWithNull.types  |   6 +-
 .../typeArgumentInference.errors.txt          |   4 +-
 .../reference/typeArgumentInference.types     |  16 +-
 ...entInferenceConstructSignatures.errors.txt |   4 +-
 ...ArgumentInferenceConstructSignatures.types |  16 +-
 ...rgumentInferenceWithConstraints.errors.txt |   4 +-
 ...typeArgumentInferenceWithConstraints.types |  16 +-
 .../reference/typeGuardsAsAssertions.types    |   2 +-
 .../reference/typeGuardsOnClassProperty.types |   2 +-
 .../typeInferenceFBoundedTypeParams.types     |   4 +-
 .../typeInferenceWithExcessProperties.types   |  16 +-
 .../typeInferenceWithTupleType.types          |   4 +-
 .../baselines/reference/typeMatch2.errors.txt |  28 +-
 tests/baselines/reference/typeMatch2.types    |  32 +--
 ...peParameterAsTypeParameterConstraint.types |  10 +-
 ...sTypeParameterConstraintTransitively.types |  10 +-
 ...TypeParameterConstraintTransitively2.types |   8 +-
 tests/baselines/reference/typeVal.types       |   2 +-
 .../baselines/reference/typeofInterface.types |   2 +-
 .../typeofOperatorWithNumberType.types        |   2 +-
 .../typeofOperatorWithStringType.types        |   2 +-
 .../types.asyncGenerators.esnext.1.types      |   6 +-
 .../types.asyncGenerators.esnext.2.types      |   2 +-
 .../baselines/reference/underscoreTest1.types |  84 +++---
 .../unionTypeFromArrayLiteral.errors.txt      |   4 +-
 .../reference/unionTypeFromArrayLiteral.types |   6 +-
 .../reference/unionTypeInference.types        |   2 +-
 .../reference/unusedImportDeclaration.types   |   2 +-
 .../reference/useBeforeDeclaration.types      |   2 +-
 .../validMultipleVariableDeclarations.types   |   6 +-
 tests/baselines/reference/vardecl.types       |   4 +-
 ...aratorResolvedDuringContextualTyping.types |   2 +-
 .../voidOperatorWithNumberType.types          |   2 +-
 .../voidOperatorWithStringType.types          |   2 +-
 tests/baselines/reference/widenToAny1.types   |   2 +-
 tests/baselines/reference/widenToAny2.types   |   2 +-
 .../baselines/reference/withExportDecl.types  |   4 +-
 .../baselines/reference/withImportDecl.types  |   2 +-
 ...wrappedAndRecursiveConstraints3.errors.txt |  23 ++
 .../wrappedAndRecursiveConstraints3.types     |  22 +-
 ...wrappedAndRecursiveConstraints4.errors.txt |   8 +-
 .../wrappedAndRecursiveConstraints4.types     |  18 +-
 .../compiler/contextualTypeShouldBeLiteral.ts |  96 +++++++
 .../nestedTypeVariableInfersLiteral.ts        |  18 ++
 561 files changed, 3474 insertions(+), 2504 deletions(-)
 create mode 100644 tests/baselines/reference/contextualTypeShouldBeLiteral.js
 create mode 100644 tests/baselines/reference/contextualTypeShouldBeLiteral.symbols
 create mode 100644 tests/baselines/reference/contextualTypeShouldBeLiteral.types
 create mode 100644 tests/baselines/reference/nestedTypeVariableInfersLiteral.js
 create mode 100644 tests/baselines/reference/nestedTypeVariableInfersLiteral.symbols
 create mode 100644 tests/baselines/reference/nestedTypeVariableInfersLiteral.types
 create mode 100644 tests/baselines/reference/wrappedAndRecursiveConstraints3.errors.txt
 create mode 100644 tests/cases/compiler/contextualTypeShouldBeLiteral.ts
 create mode 100644 tests/cases/compiler/nestedTypeVariableInfersLiteral.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6846807c3af4f..e0c4ee8ffae7c 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -4306,9 +4306,10 @@ namespace ts {
             if (strictNullChecks && declaration.initializer && !(getFalsyFlags(checkExpressionCached(declaration.initializer)) & TypeFlags.Undefined)) {
                 type = getTypeWithFacts(type, TypeFacts.NEUndefined);
             }
-            return declaration.initializer ?
+            type = declaration.initializer ?
                 getUnionType([type, checkExpressionCached(declaration.initializer)], /*subtypeReduction*/ true) :
                 type;
+            return shouldUseLiteralType(declaration) ? type : getWidenedLiteralType(type);
         }
 
         function getTypeForDeclarationFromJSDocComment(declaration: Node) {
@@ -10672,7 +10673,7 @@ namespace ts {
         }
 
         function getWidenedLiteralLikeTypeForContextualType(type: Type, contextualType: Type) {
-            if (!isLiteralLikeContextualType(contextualType)) {
+            if (!isLiteralLikeContextualType(type, contextualType)) {
                 type = getWidenedUniqueESSymbolType(getWidenedLiteralType(type));
             }
             return type;
@@ -18856,24 +18857,30 @@ namespace ts {
 
         function checkDeclarationInitializer(declaration: VariableLikeDeclaration) {
             const type = getTypeOfExpression(declaration.initializer, /*cache*/ true);
+            return shouldUseLiteralType(declaration) ? type : getWidenedLiteralType(type);
+        }
+
+        function shouldUseLiteralType(declaration: VariableLikeDeclaration) {
             return getCombinedNodeFlags(declaration) & NodeFlags.Const ||
-                (getCombinedModifierFlags(declaration) & ModifierFlags.Readonly && !isParameterPropertyDeclaration(declaration)) ||
-                isTypeAssertion(declaration.initializer) ? type : getWidenedLiteralType(type);
+                getCombinedModifierFlags(declaration) & ModifierFlags.Readonly && !isParameterPropertyDeclaration(declaration) ||
+                (declaration.initializer && isTypeAssertion(declaration.initializer));
         }
 
-        function isLiteralLikeContextualType(contextualType: Type) {
+        function isLiteralLikeContextualType(candidateLiteral: Type, contextualType: Type): boolean {
             if (contextualType) {
+                if (contextualType.flags & TypeFlags.UnionOrIntersection) {
+                    return some((contextualType as UnionOrIntersectionType).types, t => isLiteralLikeContextualType(candidateLiteral, t));
+                }
                 if (contextualType.flags & TypeFlags.TypeVariable) {
                     const constraint = getBaseConstraintOfType(contextualType) || emptyObjectType;
-                    // If the type parameter is constrained to the base primitive type we're checking for,
-                    // consider this a literal context. For example, given a type parameter 'T extends string',
-                    // this causes us to infer string literal types for T.
-                    if (constraint.flags & (TypeFlags.String | TypeFlags.Number | TypeFlags.Boolean | TypeFlags.Enum | TypeFlags.ESSymbol)) {
-                        return true;
-                    }
-                    contextualType = constraint;
-                }
-                return maybeTypeOfKind(contextualType, (TypeFlags.Literal | TypeFlags.Index | TypeFlags.UniqueESSymbol));
+                    return isLiteralLikeContextualType(candidateLiteral, constraint);
+                }
+                // No need to `maybeTypeOfKind` on the contextual type, as it can't be a union, _however_, `candidateLiteral` might still be one!
+                return !!(((contextualType.flags & TypeFlags.StringLike) && maybeTypeOfKind(candidateLiteral, TypeFlags.StringLike)) ||
+                    ((contextualType.flags & TypeFlags.NumberLike) && maybeTypeOfKind(candidateLiteral, TypeFlags.NumberLike)) ||
+                    ((contextualType.flags & TypeFlags.BooleanLike) && maybeTypeOfKind(candidateLiteral, TypeFlags.BooleanLike)) ||
+                    ((contextualType.flags & TypeFlags.ESSymbolLike) && maybeTypeOfKind(candidateLiteral, TypeFlags.ESSymbolLike))
+                );
             }
             return false;
         }
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.types b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.types
index f3bdde0e6a4d0..9cb56ae556d7a 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.types
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndExportedFunctionThatShareAName.types
@@ -9,7 +9,7 @@ class Point {
     static Origin(): Point { return { x: 0, y: 0 }; } // unexpected error here bug 840246
 >Origin : () => Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -38,7 +38,7 @@ module A {
         static Origin(): Point { return { x: 0, y: 0 }; } // unexpected error here bug 840246
 >Origin : () => Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.types b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.types
index b0685c4f858cf..df13a45e8376b 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.types
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticFunctionAndNonExportedFunctionThatShareAName.types
@@ -9,7 +9,7 @@ class Point {
     static Origin(): Point { return { x: 0, y: 0 }; }
 >Origin : () => Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -38,7 +38,7 @@ module A {
         static Origin(): Point { return { x: 0, y: 0 }; }
 >Origin : () => Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.types b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.types
index 1c2423316dce8..72470c0731f12 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.types
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndExportedVarThatShareAName.types
@@ -9,7 +9,7 @@ class Point {
     static Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -38,7 +38,7 @@ module A {
         static Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.types b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.types
index 7aa32879b7c79..cdbb8afbc1fa4 100644
--- a/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.types
+++ b/tests/baselines/reference/ClassAndModuleThatMergeWithStaticVariableAndNonExportedVarThatShareAName.types
@@ -9,7 +9,7 @@ class Point {
     static Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -38,7 +38,7 @@ module A {
         static Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ES5For-of30.types b/tests/baselines/reference/ES5For-of30.types
index e55ead743ada8..02d59e5dab3b9 100644
--- a/tests/baselines/reference/ES5For-of30.types
+++ b/tests/baselines/reference/ES5For-of30.types
@@ -5,7 +5,7 @@ var a: string, b: number;
 
 var tuple: [number, string] = [2, "3"];
 >tuple : [number, string]
->[2, "3"] : [number, string]
+>[2, "3"] : [2, "3"]
 >2 : 2
 >"3" : "3"
 
diff --git a/tests/baselines/reference/ES5For-ofTypeCheck3.types b/tests/baselines/reference/ES5For-ofTypeCheck3.types
index d46cdd0172d56..9509055e5d68c 100644
--- a/tests/baselines/reference/ES5For-ofTypeCheck3.types
+++ b/tests/baselines/reference/ES5For-ofTypeCheck3.types
@@ -1,7 +1,7 @@
 === tests/cases/conformance/statements/for-ofStatements/ES5For-ofTypeCheck3.ts ===
 var tuple: [string, number] = ["", 0];
 >tuple : [string, number]
->["", 0] : [string, number]
+>["", 0] : ["", 0]
 >"" : ""
 >0 : 0
 
diff --git a/tests/baselines/reference/ES5for-of32.types b/tests/baselines/reference/ES5for-of32.types
index 22e387d8484e4..d922b945c7391 100644
--- a/tests/baselines/reference/ES5for-of32.types
+++ b/tests/baselines/reference/ES5for-of32.types
@@ -20,9 +20,9 @@ for (let num of array) {
 >0 : 0
 
         array = [4,5,6]
->array = [4,5,6] : number[]
+>array = [4,5,6] : (4 | 5 | 6)[]
 >array : number[]
->[4,5,6] : number[]
+>[4,5,6] : (4 | 5 | 6)[]
 >4 : 4
 >5 : 5
 >6 : 6
diff --git a/tests/baselines/reference/ExportClassWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types b/tests/baselines/reference/ExportClassWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
index e832f36e86234..cb32bdbb3a213 100644
--- a/tests/baselines/reference/ExportClassWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
+++ b/tests/baselines/reference/ExportClassWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
@@ -15,7 +15,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -32,7 +32,7 @@ module A {
     export var Origin3d: Point3d = { x: 0, y: 0, z: 0 };
 >Origin3d : Point3d
 >Point3d : Point3d
->{ x: 0, y: 0, z: 0 } : { x: number; y: number; z: number; }
+>{ x: 0, y: 0, z: 0 } : { x: 0; y: 0; z: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportClassWithInaccessibleTypeInTypeParameterConstraint.types b/tests/baselines/reference/ExportClassWithInaccessibleTypeInTypeParameterConstraint.types
index 1a97175a833c4..dc291b6be53f5 100644
--- a/tests/baselines/reference/ExportClassWithInaccessibleTypeInTypeParameterConstraint.types
+++ b/tests/baselines/reference/ExportClassWithInaccessibleTypeInTypeParameterConstraint.types
@@ -15,7 +15,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -32,7 +32,7 @@ module A {
     export var Origin3d: Point3d = { x: 0, y: 0, z: 0 };
 >Origin3d : Point3d
 >Point3d : Point3d
->{ x: 0, y: 0, z: 0 } : { x: number; y: number; z: number; }
+>{ x: 0, y: 0, z: 0 } : { x: 0; y: 0; z: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportFunctionWithAccessibleTypesInParameterAndReturnTypeAnnotation.types b/tests/baselines/reference/ExportFunctionWithAccessibleTypesInParameterAndReturnTypeAnnotation.types
index 957c9ce0207a2..cd824039feb22 100644
--- a/tests/baselines/reference/ExportFunctionWithAccessibleTypesInParameterAndReturnTypeAnnotation.types
+++ b/tests/baselines/reference/ExportFunctionWithAccessibleTypesInParameterAndReturnTypeAnnotation.types
@@ -31,7 +31,7 @@ module A {
         return new Line({ x: 0, y: 0 }, p);
 >new Line({ x: 0, y: 0 }, p) : Line
 >Line : typeof Line
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInParameterTypeAnnotation.types b/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInParameterTypeAnnotation.types
index 079b39650d010..f31cccdf3e7ed 100644
--- a/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInParameterTypeAnnotation.types
+++ b/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInParameterTypeAnnotation.types
@@ -31,7 +31,7 @@ module A {
         return new Line({ x: 0, y: 0 }, p);
 >new Line({ x: 0, y: 0 }, p) : Line
 >Line : typeof Line
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInReturnTypeAnnotation.types b/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInReturnTypeAnnotation.types
index 6fcbb786a68a6..a78a3e54cefdb 100644
--- a/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInReturnTypeAnnotation.types
+++ b/tests/baselines/reference/ExportFunctionWithInaccessibleTypesInReturnTypeAnnotation.types
@@ -31,7 +31,7 @@ module A {
         return new Line({ x: 0, y: 0 }, p);
 >new Line({ x: 0, y: 0 }, p) : Line
 >Line : typeof Line
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportInterfaceWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types b/tests/baselines/reference/ExportInterfaceWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
index c7c78424064d5..ddbe70119c062 100644
--- a/tests/baselines/reference/ExportInterfaceWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
+++ b/tests/baselines/reference/ExportInterfaceWithAccessibleTypesInTypeParameterConstraintsClassHeritageListMemberTypeAnnotations.types
@@ -15,7 +15,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -32,7 +32,7 @@ module A {
     export var Origin3d: Point3d = { x: 0, y: 0, z: 0 };
 >Origin3d : Point3d
 >Point3d : Point3d
->{ x: 0, y: 0, z: 0 } : { x: number; y: number; z: number; }
+>{ x: 0, y: 0, z: 0 } : { x: 0; y: 0; z: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportInterfaceWithInaccessibleTypeInTypeParameterConstraint.types b/tests/baselines/reference/ExportInterfaceWithInaccessibleTypeInTypeParameterConstraint.types
index 8d07e4a44dd7f..c3b1d5b0c1e47 100644
--- a/tests/baselines/reference/ExportInterfaceWithInaccessibleTypeInTypeParameterConstraint.types
+++ b/tests/baselines/reference/ExportInterfaceWithInaccessibleTypeInTypeParameterConstraint.types
@@ -15,7 +15,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -32,7 +32,7 @@ module A {
     export var Origin3d: Point3d = { x: 0, y: 0, z: 0 };
 >Origin3d : Point3d
 >Point3d : Point3d
->{ x: 0, y: 0, z: 0 } : { x: number; y: number; z: number; }
+>{ x: 0, y: 0, z: 0 } : { x: 0; y: 0; z: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportModuleWithAccessibleTypesOnItsExportedMembers.types b/tests/baselines/reference/ExportModuleWithAccessibleTypesOnItsExportedMembers.types
index a3ee7c55a4c16..e2caff571ca49 100644
--- a/tests/baselines/reference/ExportModuleWithAccessibleTypesOnItsExportedMembers.types
+++ b/tests/baselines/reference/ExportModuleWithAccessibleTypesOnItsExportedMembers.types
@@ -40,7 +40,7 @@ module A {
                 return new Line({ x: 0, y: 0 }, p);
 >new Line({ x: 0, y: 0 }, p) : Line
 >Line : typeof Line
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportObjectLiteralAndObjectTypeLiteralWithAccessibleTypesInMemberTypeAnnotations.types b/tests/baselines/reference/ExportObjectLiteralAndObjectTypeLiteralWithAccessibleTypesInMemberTypeAnnotations.types
index 0ce1b82d67e12..ad292b3accf73 100644
--- a/tests/baselines/reference/ExportObjectLiteralAndObjectTypeLiteralWithAccessibleTypesInMemberTypeAnnotations.types
+++ b/tests/baselines/reference/ExportObjectLiteralAndObjectTypeLiteralWithAccessibleTypesInMemberTypeAnnotations.types
@@ -13,7 +13,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportVariableWithAccessibleTypeInTypeAnnotation.types b/tests/baselines/reference/ExportVariableWithAccessibleTypeInTypeAnnotation.types
index 91504be2c7024..32d2213d9bdec 100644
--- a/tests/baselines/reference/ExportVariableWithAccessibleTypeInTypeAnnotation.types
+++ b/tests/baselines/reference/ExportVariableWithAccessibleTypeInTypeAnnotation.types
@@ -16,7 +16,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ExportVariableWithInaccessibleTypeInTypeAnnotation.types b/tests/baselines/reference/ExportVariableWithInaccessibleTypeInTypeAnnotation.types
index 39bc5fa8af0ec..9cd0b08c8abb4 100644
--- a/tests/baselines/reference/ExportVariableWithInaccessibleTypeInTypeAnnotation.types
+++ b/tests/baselines/reference/ExportVariableWithInaccessibleTypeInTypeAnnotation.types
@@ -16,7 +16,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -34,7 +34,7 @@ module A {
     export var Origin3d: Point3d = { x: 0, y: 0, z: 0 };
 >Origin3d : Point3d
 >Point3d : Point3d
->{ x: 0, y: 0, z: 0 } : { x: number; y: number; z: number; }
+>{ x: 0, y: 0, z: 0 } : { x: 0; y: 0; z: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/ModuleWithExportedAndNonExportedImportAlias.types b/tests/baselines/reference/ModuleWithExportedAndNonExportedImportAlias.types
index 74e8d7f271f79..87e44d833a047 100644
--- a/tests/baselines/reference/ModuleWithExportedAndNonExportedImportAlias.types
+++ b/tests/baselines/reference/ModuleWithExportedAndNonExportedImportAlias.types
@@ -52,7 +52,7 @@ module Geometry {
 >Origin : Points.Point
 >Points : any
 >Point : Points.Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -68,7 +68,7 @@ module Geometry {
 >Lines : typeof Lines
 >Line : typeof Lines.Line
 >Origin : Points.Point
->{ x: 1, y: 0 } : { x: number; y: number; }
+>{ x: 1, y: 0 } : { x: 1; y: 0; }
 >x : number
 >1 : 1
 >y : number
diff --git a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedAndNonExportedLocalVarsOfTheSameName.types b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedAndNonExportedLocalVarsOfTheSameName.types
index 25a627030c43e..5d5771d06f815 100644
--- a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedAndNonExportedLocalVarsOfTheSameName.types
+++ b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedAndNonExportedLocalVarsOfTheSameName.types
@@ -37,7 +37,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -121,7 +121,7 @@ var p = new A.Utils.Plane(o, { x: 1, y: 1 });
 >Utils : typeof A.Utils
 >Plane : typeof A.Utils.Plane
 >o : { x: number; y: number; }
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
diff --git a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.types b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.types
index b9132a1d2cb26..0b3a0c067bc90 100644
--- a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.types
+++ b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.types
@@ -38,7 +38,7 @@ export module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndDifferentCommonRoot.types b/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndDifferentCommonRoot.types
index 2d654a580ea38..89f3441242679 100644
--- a/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndDifferentCommonRoot.types
+++ b/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndDifferentCommonRoot.types
@@ -53,7 +53,7 @@ module otherRoot {
 >Root : any
 >A : any
 >Point : Root.A.Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndSameCommonRoot.types b/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndSameCommonRoot.types
index 11cb6e95d2814..0ae71b43fee00 100644
--- a/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndSameCommonRoot.types
+++ b/tests/baselines/reference/TwoInternalModulesWithTheSameNameAndSameCommonRoot.types
@@ -43,7 +43,7 @@ module A {
     export var Origin: Point = { x: 0, y: 0 };
 >Origin : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -117,7 +117,7 @@ var p = new A.Utils.Plane(o, { x: 1, y: 1 });
 >Utils : typeof A.Utils
 >Plane : typeof A.Utils.Plane
 >o : { x: number; y: number; }
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
diff --git a/tests/baselines/reference/accessorsAreNotContextuallyTyped.types b/tests/baselines/reference/accessorsAreNotContextuallyTyped.types
index c48ad59372465..780f2ca4235da 100644
--- a/tests/baselines/reference/accessorsAreNotContextuallyTyped.types
+++ b/tests/baselines/reference/accessorsAreNotContextuallyTyped.types
@@ -14,7 +14,7 @@ class C {
 >x : (a: string) => string
 
         return (x: string) => "";
->(x: string) => "" : (x: string) => string
+>(x: string) => "" : (x: string) => ""
 >x : string
 >"" : ""
     }
diff --git a/tests/baselines/reference/allowImportClausesToMergeWithTypes.types b/tests/baselines/reference/allowImportClausesToMergeWithTypes.types
index 89d6a416ff302..87eff08e05d8f 100644
--- a/tests/baselines/reference/allowImportClausesToMergeWithTypes.types
+++ b/tests/baselines/reference/allowImportClausesToMergeWithTypes.types
@@ -20,7 +20,7 @@ import zzz from "./b";
 const x: zzz = { x: "" };
 >x : zzz
 >zzz : zzz
->{ x: "" } : { x: string; }
+>{ x: "" } : { x: ""; }
 >x : string
 >"" : ""
 
@@ -38,7 +38,7 @@ import zzz from "./a";
 const x: zzz = { x: "" };
 >x : zzz
 >zzz : zzz
->{ x: "" } : { x: string; }
+>{ x: "" } : { x: ""; }
 >x : string
 >"" : ""
 
diff --git a/tests/baselines/reference/argumentExpressionContextualTyping.types b/tests/baselines/reference/argumentExpressionContextualTyping.types
index 3b0fec11aa2cf..7a8ea06f3ecce 100644
--- a/tests/baselines/reference/argumentExpressionContextualTyping.types
+++ b/tests/baselines/reference/argumentExpressionContextualTyping.types
@@ -51,13 +51,13 @@ var o1: { x: [string, number], y: { c: boolean, d: string, e: number } } = { x:
 >c : boolean
 >d : string
 >e : number
->{ x: ["string", 1], y: { c: true, d: "world", e: 3 } } : { x: [string, number]; y: { c: true; d: string; e: number; }; }
->x : [string, number]
->["string", 1] : [string, number]
+>{ x: ["string", 1], y: { c: true, d: "world", e: 3 } } : { x: ["string", 1]; y: { c: true; d: "world"; e: 3; }; }
+>x : ["string", 1]
+>["string", 1] : ["string", 1]
 >"string" : "string"
 >1 : 1
->y : { c: true; d: string; e: number; }
->{ c: true, d: "world", e: 3 } : { c: true; d: string; e: number; }
+>y : { c: true; d: "world"; e: 3; }
+>{ c: true, d: "world", e: 3 } : { c: true; d: "world"; e: 3; }
 >c : boolean
 >true : true
 >d : string
@@ -96,7 +96,7 @@ var array = ["string", 1, true];
 
 var tuple: [string, number, boolean] = ["string", 1, true];
 >tuple : [string, number, boolean]
->["string", 1, true] : [string, number, true]
+>["string", 1, true] : ["string", 1, true]
 >"string" : "string"
 >1 : 1
 >true : true
@@ -109,7 +109,7 @@ baz(tuple);
 baz(["string", 1, true]);
 >baz(["string", 1, true]) : void
 >baz : (x: [string, number, boolean]) => void
->["string", 1, true] : [string, number, true]
+>["string", 1, true] : ["string", 1, true]
 >"string" : "string"
 >1 : 1
 >true : true
diff --git a/tests/baselines/reference/arrayBestCommonTypes.types b/tests/baselines/reference/arrayBestCommonTypes.types
index 864b1adfacba6..3da98ef2846d4 100644
--- a/tests/baselines/reference/arrayBestCommonTypes.types
+++ b/tests/baselines/reference/arrayBestCommonTypes.types
@@ -236,14 +236,14 @@ module EmptyTypes {
 >x : number
 >y : base
 >base : base
->[{ x: 7, y: new derived() }, { x: 5, y: new base() }] : { x: number; y: derived; }[]
->{ x: 7, y: new derived() } : { x: number; y: derived; }
+>[{ x: 7, y: new derived() }, { x: 5, y: new base() }] : ({ x: 7; y: derived; } | { x: 5; y: base; })[]
+>{ x: 7, y: new derived() } : { x: 7; y: derived; }
 >x : number
 >7 : 7
 >y : derived
 >new derived() : derived
 >derived : typeof derived
->{ x: 5, y: new base() } : { x: number; y: base; }
+>{ x: 5, y: new base() } : { x: 5; y: base; }
 >x : number
 >5 : 5
 >y : base
@@ -274,14 +274,14 @@ module EmptyTypes {
 >x : string
 >y : base
 >base : base
->[{ x: undefined, y: new base() }, { x: '', y: new derived() }] : { x: string; y: derived; }[]
+>[{ x: undefined, y: new base() }, { x: '', y: new derived() }] : { x: ""; y: derived; }[]
 >{ x: undefined, y: new base() } : { x: undefined; y: base; }
 >x : undefined
 >undefined : undefined
 >y : base
 >new base() : base
 >base : typeof base
->{ x: '', y: new derived() } : { x: string; y: derived; }
+>{ x: '', y: new derived() } : { x: ""; y: derived; }
 >x : string
 >'' : ""
 >y : derived
@@ -639,14 +639,14 @@ module NonEmptyTypes {
 >x : number
 >y : base
 >base : base
->[{ x: 7, y: new derived() }, { x: 5, y: new base() }] : { x: number; y: base; }[]
->{ x: 7, y: new derived() } : { x: number; y: derived; }
+>[{ x: 7, y: new derived() }, { x: 5, y: new base() }] : ({ x: 7; y: derived; } | { x: 5; y: base; })[]
+>{ x: 7, y: new derived() } : { x: 7; y: derived; }
 >x : number
 >7 : 7
 >y : derived
 >new derived() : derived
 >derived : typeof derived
->{ x: 5, y: new base() } : { x: number; y: base; }
+>{ x: 5, y: new base() } : { x: 5; y: base; }
 >x : number
 >5 : 5
 >y : base
@@ -677,14 +677,14 @@ module NonEmptyTypes {
 >x : string
 >y : base
 >base : base
->[{ x: undefined, y: new base() }, { x: '', y: new derived() }] : ({ x: undefined; y: base; } | { x: string; y: derived; })[]
+>[{ x: undefined, y: new base() }, { x: '', y: new derived() }] : ({ x: undefined; y: base; } | { x: ""; y: derived; })[]
 >{ x: undefined, y: new base() } : { x: undefined; y: base; }
 >x : undefined
 >undefined : undefined
 >y : base
 >new base() : base
 >base : typeof base
->{ x: '', y: new derived() } : { x: string; y: derived; }
+>{ x: '', y: new derived() } : { x: ""; y: derived; }
 >x : string
 >'' : ""
 >y : derived
diff --git a/tests/baselines/reference/arrayLiteral.types b/tests/baselines/reference/arrayLiteral.types
index c36cc93c68e38..9744fd320c459 100644
--- a/tests/baselines/reference/arrayLiteral.types
+++ b/tests/baselines/reference/arrayLiteral.types
@@ -39,12 +39,12 @@ var x2: number[] = new Array(1);
 
 var y2: number[] = [1];
 >y2 : number[]
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
 var y2: number[] = [1, 2];
 >y2 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
index 8cb36b113a754..a324163a5fa3a 100644
--- a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
+++ b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(6,5): error TS2322: Type '[number, number, number, number]' is not assignable to type '[number, number, number]'.
+tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(6,5): error TS2322: Type '[1, 2, 3, 4]' is not assignable to type '[number, number, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
-tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(7,5): error TS2322: Type '[number, number, number, string]' is not assignable to type '[string | number, string | number, string | number]'.
+tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(7,5): error TS2322: Type '[1, 2, 3, "string"]' is not assignable to type '[string | number, string | number, string | number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
-tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(8,5): error TS2322: Type '[number, number, number, string]' is not assignable to type '[number, number, number]'.
+tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(8,5): error TS2322: Type '[1, 2, 3, string]' is not assignable to type '[number, number, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
 tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionContextualTyping.ts(14,5): error TS2322: Type 'number[]' is not assignable to type '[number, number, number]'.
@@ -19,17 +19,17 @@ tests/cases/conformance/expressions/contextualTyping/arrayLiteralExpressionConte
     var array1 = [true, 2, 3];  // Contextual type by the numeric index type of the contextual type
     var tup: [number, number, number] = [1, 2, 3, 4];
         ~~~
-!!! error TS2322: Type '[number, number, number, number]' is not assignable to type '[number, number, number]'.
+!!! error TS2322: Type '[1, 2, 3, 4]' is not assignable to type '[number, number, number]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '4' is not assignable to type '3'.
     var tup1: [number|string, number|string, number|string] = [1, 2, 3, "string"];
         ~~~~
-!!! error TS2322: Type '[number, number, number, string]' is not assignable to type '[string | number, string | number, string | number]'.
+!!! error TS2322: Type '[1, 2, 3, "string"]' is not assignable to type '[string | number, string | number, string | number]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '4' is not assignable to type '3'.
     var tup2: [number, number, number] = [1, 2, 3, "string"];  // Error
         ~~~~
-!!! error TS2322: Type '[number, number, number, string]' is not assignable to type '[number, number, number]'.
+!!! error TS2322: Type '[1, 2, 3, string]' is not assignable to type '[number, number, number]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '4' is not assignable to type '3'.
     
diff --git a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
index 5954448c984fb..7b487c11e1509 100644
--- a/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
+++ b/tests/baselines/reference/arrayLiteralExpressionContextualTyping.types
@@ -18,7 +18,7 @@ var array1 = [true, 2, 3];  // Contextual type by the numeric index type of the
 
 var tup: [number, number, number] = [1, 2, 3, 4];
 >tup : [number, number, number]
->[1, 2, 3, 4] : [number, number, number, number]
+>[1, 2, 3, 4] : [1, 2, 3, 4]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -26,7 +26,7 @@ var tup: [number, number, number] = [1, 2, 3, 4];
 
 var tup1: [number|string, number|string, number|string] = [1, 2, 3, "string"];
 >tup1 : [string | number, string | number, string | number]
->[1, 2, 3, "string"] : [number, number, number, string]
+>[1, 2, 3, "string"] : [1, 2, 3, "string"]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -34,7 +34,7 @@ var tup1: [number|string, number|string, number|string] = [1, 2, 3, "string"];
 
 var tup2: [number, number, number] = [1, 2, 3, "string"];  // Error
 >tup2 : [number, number, number]
->[1, 2, 3, "string"] : [number, number, number, string]
+>[1, 2, 3, "string"] : [1, 2, 3, string]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/arrayLiteralTypeInference.errors.txt b/tests/baselines/reference/arrayLiteralTypeInference.errors.txt
index a2c4597127fbc..9c05da442386d 100644
--- a/tests/baselines/reference/arrayLiteralTypeInference.errors.txt
+++ b/tests/baselines/reference/arrayLiteralTypeInference.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/compiler/arrayLiteralTypeInference.ts(14,14): error TS2322: Type '({ id: number; trueness: boolean; } | { id: number; name: string; })[]' is not assignable to type 'Action[]'.
-  Type '{ id: number; trueness: boolean; } | { id: number; name: string; }' is not assignable to type 'Action'.
-    Type '{ id: number; trueness: boolean; }' is not assignable to type 'Action'.
+tests/cases/compiler/arrayLiteralTypeInference.ts(14,14): error TS2322: Type '({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]' is not assignable to type 'Action[]'.
+  Type '{ id: 2; trueness: boolean; } | { id: 3; name: string; }' is not assignable to type 'Action'.
+    Type '{ id: 2; trueness: boolean; }' is not assignable to type 'Action'.
       Object literal may only specify known properties, and 'trueness' does not exist in type 'Action'.
-tests/cases/compiler/arrayLiteralTypeInference.ts(31,18): error TS2322: Type '({ id: number; trueness: boolean; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-  Type '{ id: number; trueness: boolean; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-    Type '{ id: number; trueness: boolean; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/arrayLiteralTypeInference.ts(31,18): error TS2322: Type '({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+  Type '{ id: 2; trueness: boolean; } | { id: 3; name: string; }' is not assignable to type '{ id: number; }'.
+    Type '{ id: 2; trueness: boolean; }' is not assignable to type '{ id: number; }'.
       Object literal may only specify known properties, and 'trueness' does not exist in type '{ id: number; }'.
 
 
@@ -24,9 +24,9 @@ tests/cases/compiler/arrayLiteralTypeInference.ts(31,18): error TS2322: Type '({
     var x1: Action[] = [
         { id: 2, trueness: false },
                  ~~~~~~~~~~~~~~~
-!!! error TS2322: Type '({ id: number; trueness: boolean; } | { id: number; name: string; })[]' is not assignable to type 'Action[]'.
-!!! error TS2322:   Type '{ id: number; trueness: boolean; } | { id: number; name: string; }' is not assignable to type 'Action'.
-!!! error TS2322:     Type '{ id: number; trueness: boolean; }' is not assignable to type 'Action'.
+!!! error TS2322: Type '({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]' is not assignable to type 'Action[]'.
+!!! error TS2322:   Type '{ id: 2; trueness: boolean; } | { id: 3; name: string; }' is not assignable to type 'Action'.
+!!! error TS2322:     Type '{ id: 2; trueness: boolean; }' is not assignable to type 'Action'.
 !!! error TS2322:       Object literal may only specify known properties, and 'trueness' does not exist in type 'Action'.
         { id: 3, name: "three" }
     ]
@@ -46,9 +46,9 @@ tests/cases/compiler/arrayLiteralTypeInference.ts(31,18): error TS2322: Type '({
         [
             { id: 2, trueness: false },
                      ~~~~~~~~~~~~~~~
-!!! error TS2322: Type '({ id: number; trueness: boolean; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-!!! error TS2322:   Type '{ id: number; trueness: boolean; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-!!! error TS2322:     Type '{ id: number; trueness: boolean; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+!!! error TS2322:   Type '{ id: 2; trueness: boolean; } | { id: 3; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322:     Type '{ id: 2; trueness: boolean; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:       Object literal may only specify known properties, and 'trueness' does not exist in type '{ id: number; }'.
             { id: 3, name: "three" }
         ]
diff --git a/tests/baselines/reference/arrayLiteralTypeInference.types b/tests/baselines/reference/arrayLiteralTypeInference.types
index bb3c8b0b7debf..68b6e5118ab4e 100644
--- a/tests/baselines/reference/arrayLiteralTypeInference.types
+++ b/tests/baselines/reference/arrayLiteralTypeInference.types
@@ -25,17 +25,17 @@ class ActionB extends Action {
 var x1: Action[] = [
 >x1 : Action[]
 >Action : Action
->[    { id: 2, trueness: false },    { id: 3, name: "three" }] : ({ id: number; trueness: boolean; } | { id: number; name: string; })[]
+>[    { id: 2, trueness: false },    { id: 3, name: "three" }] : ({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]
 
     { id: 2, trueness: false },
->{ id: 2, trueness: false } : { id: number; trueness: boolean; }
+>{ id: 2, trueness: false } : { id: 2; trueness: boolean; }
 >id : number
 >2 : 2
 >trueness : boolean
 >false : false
 
     { id: 3, name: "three" }
->{ id: 3, name: "three" } : { id: number; name: string; }
+>{ id: 3, name: "three" } : { id: 3; name: string; }
 >id : number
 >3 : 3
 >name : string
@@ -82,17 +82,17 @@ var z1: { id: number }[] =
 >id : number
 
     [
->[        { id: 2, trueness: false },        { id: 3, name: "three" }    ] : ({ id: number; trueness: boolean; } | { id: number; name: string; })[]
+>[        { id: 2, trueness: false },        { id: 3, name: "three" }    ] : ({ id: 2; trueness: boolean; } | { id: 3; name: string; })[]
 
         { id: 2, trueness: false },
->{ id: 2, trueness: false } : { id: number; trueness: boolean; }
+>{ id: 2, trueness: false } : { id: 2; trueness: boolean; }
 >id : number
 >2 : 2
 >trueness : boolean
 >false : false
 
         { id: 3, name: "three" }
->{ id: 3, name: "three" } : { id: number; name: string; }
+>{ id: 3, name: "three" } : { id: 3; name: string; }
 >id : number
 >3 : 3
 >name : string
diff --git a/tests/baselines/reference/arrayLiterals.errors.txt b/tests/baselines/reference/arrayLiterals.errors.txt
index f5fe71b79a6e7..565098389ea37 100644
--- a/tests/baselines/reference/arrayLiterals.errors.txt
+++ b/tests/baselines/reference/arrayLiterals.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/expressions/arrayLiterals/arrayLiterals.ts(24,77): error TS2322: Type '({ a: string; b: number; c: string; } | { a: string; b: number; c: number; })[]' is not assignable to type '{ [n: number]: { a: string; b: number; }; }'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals.ts(24,77): error TS2322: Type '({ a: ""; b: 0; c: string; } | { a: ""; b: 3; c: number; })[]' is not assignable to type '{ [n: number]: { a: string; b: number; }; }'.
   Index signatures are incompatible.
-    Type '{ a: string; b: number; c: string; } | { a: string; b: number; c: number; }' is not assignable to type '{ a: string; b: number; }'.
-      Type '{ a: string; b: number; c: string; }' is not assignable to type '{ a: string; b: number; }'.
+    Type '{ a: ""; b: 0; c: string; } | { a: ""; b: 3; c: number; }' is not assignable to type '{ a: string; b: number; }'.
+      Type '{ a: ""; b: 0; c: string; }' is not assignable to type '{ a: string; b: number; }'.
         Object literal may only specify known properties, and 'c' does not exist in type '{ a: string; b: number; }'.
 
 
@@ -31,10 +31,10 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals.ts(24,77): error
     // Contextual type C with numeric index signature makes array literal of EveryType E of type BCT(E,C)[]
     var context1: { [n: number]: { a: string; b: number; }; } = [{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }];
                                                                                 ~~~~~
-!!! error TS2322: Type '({ a: string; b: number; c: string; } | { a: string; b: number; c: number; })[]' is not assignable to type '{ [n: number]: { a: string; b: number; }; }'.
+!!! error TS2322: Type '({ a: ""; b: 0; c: string; } | { a: ""; b: 3; c: number; })[]' is not assignable to type '{ [n: number]: { a: string; b: number; }; }'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '{ a: string; b: number; c: string; } | { a: string; b: number; c: number; }' is not assignable to type '{ a: string; b: number; }'.
-!!! error TS2322:       Type '{ a: string; b: number; c: string; }' is not assignable to type '{ a: string; b: number; }'.
+!!! error TS2322:     Type '{ a: ""; b: 0; c: string; } | { a: ""; b: 3; c: number; }' is not assignable to type '{ a: string; b: number; }'.
+!!! error TS2322:       Type '{ a: ""; b: 0; c: string; }' is not assignable to type '{ a: string; b: number; }'.
 !!! error TS2322:         Object literal may only specify known properties, and 'c' does not exist in type '{ a: string; b: number; }'.
     var context2 = [{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }];
     
diff --git a/tests/baselines/reference/arrayLiterals.types b/tests/baselines/reference/arrayLiterals.types
index 02dec0c8ecda8..9afd92aff2751 100644
--- a/tests/baselines/reference/arrayLiterals.types
+++ b/tests/baselines/reference/arrayLiterals.types
@@ -82,15 +82,15 @@ var context1: { [n: number]: { a: string; b: number; }; } = [{ a: '', b: 0, c: '
 >n : number
 >a : string
 >b : number
->[{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }] : ({ a: string; b: number; c: string; } | { a: string; b: number; c: number; })[]
->{ a: '', b: 0, c: '' } : { a: string; b: number; c: string; }
+>[{ a: '', b: 0, c: '' }, { a: "", b: 3, c: 0 }] : ({ a: ""; b: 0; c: string; } | { a: ""; b: 3; c: number; })[]
+>{ a: '', b: 0, c: '' } : { a: ""; b: 0; c: string; }
 >a : string
 >'' : ""
 >b : number
 >0 : 0
 >c : string
 >'' : ""
->{ a: "", b: 3, c: 0 } : { a: string; b: number; c: number; }
+>{ a: "", b: 3, c: 0 } : { a: ""; b: 3; c: number; }
 >a : string
 >"" : ""
 >b : number
diff --git a/tests/baselines/reference/arrayLiterals2ES5.types b/tests/baselines/reference/arrayLiterals2ES5.types
index c3256db925e02..cc934367597eb 100644
--- a/tests/baselines/reference/arrayLiterals2ES5.types
+++ b/tests/baselines/reference/arrayLiterals2ES5.types
@@ -72,12 +72,12 @@ var b0: [any, any, any] = [undefined, null, undefined];
 
 var b1: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
 >b1 : [number[], string[]]
->[[1, 2, 3], ["hello", "string"]] : [number[], string[]]
->[1, 2, 3] : number[]
+>[[1, 2, 3], ["hello", "string"]] : [(2 | 3 | 1)[], ("hello" | "string")[]]
+>[1, 2, 3] : (2 | 3 | 1)[]
 >1 : 1
 >2 : 2
 >3 : 3
->["hello", "string"] : string[]
+>["hello", "string"] : ("hello" | "string")[]
 >"hello" : "hello"
 >"string" : "string"
 
@@ -119,12 +119,12 @@ var temp1 = [1, 2, 3];
 
 var temp2: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
 >temp2 : [number[], string[]]
->[[1, 2, 3], ["hello", "string"]] : [number[], string[]]
->[1, 2, 3] : number[]
+>[[1, 2, 3], ["hello", "string"]] : [(2 | 3 | 1)[], ("hello" | "string")[]]
+>[1, 2, 3] : (2 | 3 | 1)[]
 >1 : 1
 >2 : 2
 >3 : 3
->["hello", "string"] : string[]
+>["hello", "string"] : ("hello" | "string")[]
 >"hello" : "hello"
 >"string" : "string"
 
diff --git a/tests/baselines/reference/arrayLiterals2ES6.types b/tests/baselines/reference/arrayLiterals2ES6.types
index 57f3f44f62d84..4e3b08a3e9d15 100644
--- a/tests/baselines/reference/arrayLiterals2ES6.types
+++ b/tests/baselines/reference/arrayLiterals2ES6.types
@@ -72,12 +72,12 @@ var b0: [any, any, any] = [undefined, null, undefined];
 
 var b1: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
 >b1 : [number[], string[]]
->[[1, 2, 3], ["hello", "string"]] : [number[], string[]]
->[1, 2, 3] : number[]
+>[[1, 2, 3], ["hello", "string"]] : [(2 | 3 | 1)[], ("string" | "hello")[]]
+>[1, 2, 3] : (2 | 3 | 1)[]
 >1 : 1
 >2 : 2
 >3 : 3
->["hello", "string"] : string[]
+>["hello", "string"] : ("string" | "hello")[]
 >"hello" : "hello"
 >"string" : "string"
 
@@ -119,12 +119,12 @@ var temp1 = [1, 2, 3];
 
 var temp2: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
 >temp2 : [number[], string[]]
->[[1, 2, 3], ["hello", "string"]] : [number[], string[]]
->[1, 2, 3] : number[]
+>[[1, 2, 3], ["hello", "string"]] : [(2 | 3 | 1)[], ("string" | "hello")[]]
+>[1, 2, 3] : (2 | 3 | 1)[]
 >1 : 1
 >2 : 2
 >3 : 3
->["hello", "string"] : string[]
+>["hello", "string"] : ("string" | "hello")[]
 >"hello" : "hello"
 >"string" : "string"
 
diff --git a/tests/baselines/reference/arrayLiterals3.errors.txt b/tests/baselines/reference/arrayLiterals3.errors.txt
index 8c36d7d59c148..743eecdb4e2fe 100644
--- a/tests/baselines/reference/arrayLiterals3.errors.txt
+++ b/tests/baselines/reference/arrayLiterals3.errors.txt
@@ -1,8 +1,8 @@
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(10,5): error TS2322: Type 'undefined[]' is not assignable to type '[any, any, any]'.
   Property '0' is missing in type 'undefined[]'.
-tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,5): error TS2322: Type '["string", number, boolean]' is not assignable to type '[boolean, string, number]'.
-  Type '"string"' is not assignable to type 'boolean'.
-tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(17,5): error TS2322: Type '[number, number, string, boolean]' is not assignable to type '[number, number]'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(11,5): error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
+  Type 'string' is not assignable to type 'boolean'.
+tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(17,5): error TS2322: Type '[1, 2, string, boolean]' is not assignable to type '[number, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '2'.
 tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(32,5): error TS2322: Type '(number[] | string[])[]' is not assignable to type 'tup'.
@@ -34,8 +34,8 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(34,5): error
 !!! error TS2322:   Property '0' is missing in type 'undefined[]'.
     var a1: [boolean, string, number] = ["string", 1, true];  // Error
         ~~
-!!! error TS2322: Type '["string", number, boolean]' is not assignable to type '[boolean, string, number]'.
-!!! error TS2322:   Type '"string"' is not assignable to type 'boolean'.
+!!! error TS2322: Type '[string, number, boolean]' is not assignable to type '[boolean, string, number]'.
+!!! error TS2322:   Type 'string' is not assignable to type 'boolean'.
     
     // The resulting type an array literal expression is determined as follows:
     //     - If the array literal contains no spread elements and is an array assignment pattern in a destructuring assignment (section 4.17.1),
@@ -43,7 +43,7 @@ tests/cases/conformance/expressions/arrayLiterals/arrayLiterals3.ts(34,5): error
     
     var [b1, b2]: [number, number] = [1, 2, "string", true];
         ~~~~~~~~
-!!! error TS2322: Type '[number, number, string, boolean]' is not assignable to type '[number, number]'.
+!!! error TS2322: Type '[1, 2, string, boolean]' is not assignable to type '[number, number]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '4' is not assignable to type '2'.
     
diff --git a/tests/baselines/reference/arrayLiterals3.types b/tests/baselines/reference/arrayLiterals3.types
index 827f35ead8cbd..f1c7161f9d106 100644
--- a/tests/baselines/reference/arrayLiterals3.types
+++ b/tests/baselines/reference/arrayLiterals3.types
@@ -14,7 +14,7 @@ var a0: [any, any, any] = [];                             // Error
 
 var a1: [boolean, string, number] = ["string", 1, true];  // Error
 >a1 : [boolean, string, number]
->["string", 1, true] : ["string", number, boolean]
+>["string", 1, true] : [string, number, boolean]
 >"string" : "string"
 >1 : 1
 >true : true
@@ -26,7 +26,7 @@ var a1: [boolean, string, number] = ["string", 1, true];  // Error
 var [b1, b2]: [number, number] = [1, 2, "string", true];
 >b1 : number
 >b2 : number
->[1, 2, "string", true] : [number, number, string, boolean]
+>[1, 2, "string", true] : [1, 2, string, boolean]
 >1 : 1
 >2 : 2
 >"string" : "string"
@@ -51,12 +51,12 @@ var temp1 = [1, 2, 3];
 
 var temp2: [number[], string[]] = [[1, 2, 3], ["hello", "string"]];
 >temp2 : [number[], string[]]
->[[1, 2, 3], ["hello", "string"]] : [number[], string[]]
->[1, 2, 3] : number[]
+>[[1, 2, 3], ["hello", "string"]] : [(1 | 2 | 3)[], ("string" | "hello")[]]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
->["hello", "string"] : string[]
+>["hello", "string"] : ("string" | "hello")[]
 >"hello" : "hello"
 >"string" : "string"
 
diff --git a/tests/baselines/reference/arrowFunctionExpressions.types b/tests/baselines/reference/arrowFunctionExpressions.types
index 0de6c674d18dc..8f56f6f0d3c27 100644
--- a/tests/baselines/reference/arrowFunctionExpressions.types
+++ b/tests/baselines/reference/arrowFunctionExpressions.types
@@ -100,12 +100,12 @@ var p8 = ({ a = 1 }) => { };
 >1 : 1
 
 var p9 = ({ a: { b = 1 } = { b: 1 } }) => { };
->p9 : ({ a: { b } }: { a?: { b?: number; }; }) => void
->({ a: { b = 1 } = { b: 1 } }) => { } : ({ a: { b } }: { a?: { b?: number; }; }) => void
+>p9 : ({ a: { b } }: { a?: { b?: 1; }; }) => void
+>({ a: { b = 1 } = { b: 1 } }) => { } : ({ a: { b } }: { a?: { b?: 1; }; }) => void
 >a : any
 >b : number
 >1 : 1
->{ b: 1 } : { b?: number; }
+>{ b: 1 } : { b?: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/arrowFunctionWithObjectLiteralBody5.types b/tests/baselines/reference/arrowFunctionWithObjectLiteralBody5.types
index 8a006d7f1d4d4..0dee51b3e0e06 100644
--- a/tests/baselines/reference/arrowFunctionWithObjectLiteralBody5.types
+++ b/tests/baselines/reference/arrowFunctionWithObjectLiteralBody5.types
@@ -4,7 +4,7 @@ var a = () => <Error>{ name: "foo", message: "bar" };
 >() => <Error>{ name: "foo", message: "bar" } : () => Error
 ><Error>{ name: "foo", message: "bar" } : Error
 >Error : Error
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
@@ -16,7 +16,7 @@ var b = () => (<Error>{ name: "foo", message: "bar" });
 >(<Error>{ name: "foo", message: "bar" }) : Error
 ><Error>{ name: "foo", message: "bar" } : Error
 >Error : Error
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
@@ -39,8 +39,8 @@ var d = () => ((<Error>({ name: "foo", message: "bar" })));
 >(<Error>({ name: "foo", message: "bar" })) : Error
 ><Error>({ name: "foo", message: "bar" }) : Error
 >Error : Error
->({ name: "foo", message: "bar" }) : { name: string; message: string; }
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>({ name: "foo", message: "bar" }) : { name: "foo"; message: "bar"; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
diff --git a/tests/baselines/reference/arrowFunctionWithObjectLiteralBody6.types b/tests/baselines/reference/arrowFunctionWithObjectLiteralBody6.types
index 615f19aaf6b6e..ba9ea46898396 100644
--- a/tests/baselines/reference/arrowFunctionWithObjectLiteralBody6.types
+++ b/tests/baselines/reference/arrowFunctionWithObjectLiteralBody6.types
@@ -4,7 +4,7 @@ var a = () => <Error>{ name: "foo", message: "bar" };
 >() => <Error>{ name: "foo", message: "bar" } : () => Error
 ><Error>{ name: "foo", message: "bar" } : Error
 >Error : Error
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
@@ -16,7 +16,7 @@ var b = () => (<Error>{ name: "foo", message: "bar" });
 >(<Error>{ name: "foo", message: "bar" }) : Error
 ><Error>{ name: "foo", message: "bar" } : Error
 >Error : Error
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
@@ -39,8 +39,8 @@ var d = () => ((<Error>({ name: "foo", message: "bar" })));
 >(<Error>({ name: "foo", message: "bar" })) : Error
 ><Error>({ name: "foo", message: "bar" }) : Error
 >Error : Error
->({ name: "foo", message: "bar" }) : { name: string; message: string; }
->{ name: "foo", message: "bar" } : { name: string; message: string; }
+>({ name: "foo", message: "bar" }) : { name: "foo"; message: "bar"; }
+>{ name: "foo", message: "bar" } : { name: "foo"; message: "bar"; }
 >name : string
 >"foo" : "foo"
 >message : string
diff --git a/tests/baselines/reference/assign1.types b/tests/baselines/reference/assign1.types
index 51d9c72c54e9c..33796e87de038 100644
--- a/tests/baselines/reference/assign1.types
+++ b/tests/baselines/reference/assign1.types
@@ -15,7 +15,7 @@ module M {
     var x:I={salt:2,pepper:0};
 >x : I
 >I : I
->{salt:2,pepper:0} : { salt: number; pepper: number; }
+>{salt:2,pepper:0} : { salt: 2; pepper: 0; }
 >salt : number
 >2 : 2
 >pepper : number
diff --git a/tests/baselines/reference/assignmentCompatBug2.errors.txt b/tests/baselines/reference/assignmentCompatBug2.errors.txt
index 29ba96e6586d4..8f4545b776e3b 100644
--- a/tests/baselines/reference/assignmentCompatBug2.errors.txt
+++ b/tests/baselines/reference/assignmentCompatBug2.errors.txt
@@ -2,14 +2,14 @@ tests/cases/compiler/assignmentCompatBug2.ts(1,27): error TS2322: Type '{ a: num
   Object literal may only specify known properties, and 'a' does not exist in type '{ b: number; }'.
 tests/cases/compiler/assignmentCompatBug2.ts(3,8): error TS2322: Type '{ a: number; }' is not assignable to type '{ b: number; }'.
   Object literal may only specify known properties, and 'a' does not exist in type '{ b: number; }'.
-tests/cases/compiler/assignmentCompatBug2.ts(5,13): error TS2322: Type '{ b: number; a: number; }' is not assignable to type '{ b: number; }'.
+tests/cases/compiler/assignmentCompatBug2.ts(5,13): error TS2322: Type '{ b: 0; a: number; }' is not assignable to type '{ b: number; }'.
   Object literal may only specify known properties, and 'a' does not exist in type '{ b: number; }'.
-tests/cases/compiler/assignmentCompatBug2.ts(15,1): error TS2322: Type '{ f: (n: number) => number; g: (s: string) => number; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-  Property 'm' is missing in type '{ f: (n: number) => number; g: (s: string) => number; }'.
-tests/cases/compiler/assignmentCompatBug2.ts(20,1): error TS2322: Type '{ f: (n: number) => number; m: number; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-  Property 'g' is missing in type '{ f: (n: number) => number; m: number; }'.
-tests/cases/compiler/assignmentCompatBug2.ts(33,1): error TS2322: Type '{ f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-  Property 'm' is missing in type '{ f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }'.
+tests/cases/compiler/assignmentCompatBug2.ts(15,1): error TS2322: Type '{ f: (n: number) => 0; g: (s: string) => 0; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+  Property 'm' is missing in type '{ f: (n: number) => 0; g: (s: string) => 0; }'.
+tests/cases/compiler/assignmentCompatBug2.ts(20,1): error TS2322: Type '{ f: (n: number) => 0; m: 0; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+  Property 'g' is missing in type '{ f: (n: number) => 0; m: 0; }'.
+tests/cases/compiler/assignmentCompatBug2.ts(33,1): error TS2322: Type '{ f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+  Property 'm' is missing in type '{ f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }'.
 
 
 ==== tests/cases/compiler/assignmentCompatBug2.ts (6 errors) ====
@@ -25,7 +25,7 @@ tests/cases/compiler/assignmentCompatBug2.ts(33,1): error TS2322: Type '{ f: (n:
     
     b2 = {b: 0, a: 0 };
                 ~~~~
-!!! error TS2322: Type '{ b: number; a: number; }' is not assignable to type '{ b: number; }'.
+!!! error TS2322: Type '{ b: 0; a: number; }' is not assignable to type '{ b: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'a' does not exist in type '{ b: number; }'.
     
     var b3: { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; };
@@ -38,16 +38,16 @@ tests/cases/compiler/assignmentCompatBug2.ts(33,1): error TS2322: Type '{ f: (n:
     
     b3 = {
     ~~
-!!! error TS2322: Type '{ f: (n: number) => number; g: (s: string) => number; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-!!! error TS2322:   Property 'm' is missing in type '{ f: (n: number) => number; g: (s: string) => number; }'.
+!!! error TS2322: Type '{ f: (n: number) => 0; g: (s: string) => 0; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+!!! error TS2322:   Property 'm' is missing in type '{ f: (n: number) => 0; g: (s: string) => 0; }'.
         f: (n) => { return 0; },
         g: (s) => { return 0; },
     }; // error
     
     b3 = {
     ~~
-!!! error TS2322: Type '{ f: (n: number) => number; m: number; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-!!! error TS2322:   Property 'g' is missing in type '{ f: (n: number) => number; m: number; }'.
+!!! error TS2322: Type '{ f: (n: number) => 0; m: 0; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+!!! error TS2322:   Property 'g' is missing in type '{ f: (n: number) => 0; m: 0; }'.
         f: (n) => { return 0; },
         m: 0,
     }; // error
@@ -62,8 +62,8 @@ tests/cases/compiler/assignmentCompatBug2.ts(33,1): error TS2322: Type '{ f: (n:
     
     b3 = {
     ~~
-!!! error TS2322: Type '{ f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
-!!! error TS2322:   Property 'm' is missing in type '{ f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }'.
+!!! error TS2322: Type '{ f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }' is not assignable to type '{ f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }'.
+!!! error TS2322:   Property 'm' is missing in type '{ f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }'.
         f: (n) => { return 0; },
         g: (s) => { return 0; },
         n: 0,
diff --git a/tests/baselines/reference/assignmentCompatBug2.types b/tests/baselines/reference/assignmentCompatBug2.types
index 414f91b5bdcfd..bffed88d7e9e1 100644
--- a/tests/baselines/reference/assignmentCompatBug2.types
+++ b/tests/baselines/reference/assignmentCompatBug2.types
@@ -14,9 +14,9 @@ b2 = { a: 0 }; // error
 >0 : 0
 
 b2 = {b: 0, a: 0 };
->b2 = {b: 0, a: 0 } : { b: number; a: number; }
+>b2 = {b: 0, a: 0 } : { b: 0; a: number; }
 >b2 : { b: number; }
->{b: 0, a: 0 } : { b: number; a: number; }
+>{b: 0, a: 0 } : { b: 0; a: number; }
 >b : number
 >0 : 0
 >a : number
@@ -34,19 +34,19 @@ var b3: { f(n: number): number; g(s: string): number; m: number; n?: number; k?(
 >a : any
 
 b3 = {
->b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,} : { f: (n: number) => number; g: (s: string) => number; m: number; }
+>b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,} : { f: (n: number) => 0; g: (s: string) => 0; m: 0; }
 >b3 : { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }
->{    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,} : { f: (n: number) => number; g: (s: string) => number; m: number; }
+>{    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,} : { f: (n: number) => 0; g: (s: string) => 0; m: 0; }
 
     f: (n) => { return 0; },
->f : (n: number) => number
->(n) => { return 0; } : (n: number) => number
+>f : (n: number) => 0
+>(n) => { return 0; } : (n: number) => 0
 >n : number
 >0 : 0
 
     g: (s) => { return 0; },
->g : (s: string) => number
->(s) => { return 0; } : (s: string) => number
+>g : (s: string) => 0
+>(s) => { return 0; } : (s: string) => 0
 >s : string
 >0 : 0
 
@@ -57,32 +57,32 @@ b3 = {
 }; // ok
 
 b3 = {
->b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },} : { f: (n: number) => number; g: (s: string) => number; }
+>b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },} : { f: (n: number) => 0; g: (s: string) => 0; }
 >b3 : { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }
->{    f: (n) => { return 0; },    g: (s) => { return 0; },} : { f: (n: number) => number; g: (s: string) => number; }
+>{    f: (n) => { return 0; },    g: (s) => { return 0; },} : { f: (n: number) => 0; g: (s: string) => 0; }
 
     f: (n) => { return 0; },
->f : (n: number) => number
->(n) => { return 0; } : (n: number) => number
+>f : (n: number) => 0
+>(n) => { return 0; } : (n: number) => 0
 >n : number
 >0 : 0
 
     g: (s) => { return 0; },
->g : (s: string) => number
->(s) => { return 0; } : (s: string) => number
+>g : (s: string) => 0
+>(s) => { return 0; } : (s: string) => 0
 >s : string
 >0 : 0
 
 }; // error
 
 b3 = {
->b3 = {    f: (n) => { return 0; },    m: 0,} : { f: (n: number) => number; m: number; }
+>b3 = {    f: (n) => { return 0; },    m: 0,} : { f: (n: number) => 0; m: 0; }
 >b3 : { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }
->{    f: (n) => { return 0; },    m: 0,} : { f: (n: number) => number; m: number; }
+>{    f: (n) => { return 0; },    m: 0,} : { f: (n: number) => 0; m: 0; }
 
     f: (n) => { return 0; },
->f : (n: number) => number
->(n) => { return 0; } : (n: number) => number
+>f : (n: number) => 0
+>(n) => { return 0; } : (n: number) => 0
 >n : number
 >0 : 0
 
@@ -93,19 +93,19 @@ b3 = {
 }; // error
 
 b3 = {
->b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => number; g: (s: string) => number; m: number; n: number; k: (a: any) => any; }
+>b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => 0; g: (s: string) => 0; m: 0; n: 0; k: (a: any) => any; }
 >b3 : { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }
->{    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => number; g: (s: string) => number; m: number; n: number; k: (a: any) => any; }
+>{    f: (n) => { return 0; },    g: (s) => { return 0; },    m: 0,    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => 0; g: (s: string) => 0; m: 0; n: 0; k: (a: any) => any; }
 
     f: (n) => { return 0; },
->f : (n: number) => number
->(n) => { return 0; } : (n: number) => number
+>f : (n: number) => 0
+>(n) => { return 0; } : (n: number) => 0
 >n : number
 >0 : 0
 
     g: (s) => { return 0; },
->g : (s: string) => number
->(s) => { return 0; } : (s: string) => number
+>g : (s: string) => 0
+>(s) => { return 0; } : (s: string) => 0
 >s : string
 >0 : 0
 
@@ -126,19 +126,19 @@ b3 = {
 }; // ok
 
 b3 = {
->b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }
+>b3 = {    f: (n) => { return 0; },    g: (s) => { return 0; },    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }
 >b3 : { f(n: number): number; g(s: string): number; m: number; n?: number; k?(a: any): any; }
->{    f: (n) => { return 0; },    g: (s) => { return 0; },    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => number; g: (s: string) => number; n: number; k: (a: any) => any; }
+>{    f: (n) => { return 0; },    g: (s) => { return 0; },    n: 0,    k: (a) =>{ return null; },} : { f: (n: number) => 0; g: (s: string) => 0; n: 0; k: (a: any) => any; }
 
     f: (n) => { return 0; },
->f : (n: number) => number
->(n) => { return 0; } : (n: number) => number
+>f : (n: number) => 0
+>(n) => { return 0; } : (n: number) => 0
 >n : number
 >0 : 0
 
     g: (s) => { return 0; },
->g : (s: string) => number
->(s) => { return 0; } : (s: string) => number
+>g : (s: string) => 0
+>(s) => { return 0; } : (s: string) => 0
 >s : string
 >0 : 0
 
diff --git a/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.errors.txt b/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.errors.txt
index 2316320f480c9..8b5da65edd92e 100644
--- a/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.errors.txt
+++ b/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.errors.txt
@@ -1,9 +1,9 @@
 tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(1,10): error TS2391: Function implementation is missing or not immediately following the declaration.
-tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(4,5): error TS2345: Argument of type '{ id: number; name: boolean; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
+tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(4,5): error TS2345: Argument of type '{ id: 1234; name: boolean; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
   Types of property 'name' are incompatible.
     Type 'boolean' is not assignable to type 'string'.
-tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(5,5): error TS2345: Argument of type '{ name: string; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
-  Property 'id' is missing in type '{ name: string; }'.
+tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(5,5): error TS2345: Argument of type '{ name: "hello"; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
+  Property 'id' is missing in type '{ name: "hello"; }'.
 
 
 ==== tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts (3 errors) ====
@@ -14,10 +14,10 @@ tests/cases/compiler/assignmentCompatFunctionsWithOptionalArgs.ts(5,5): error TS
     foo({ id: 1234, name: "hello" });  // Ok
     foo({ id: 1234, name: false });    // Error, name of wrong type
         ~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ id: number; name: boolean; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
+!!! error TS2345: Argument of type '{ id: 1234; name: boolean; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
 !!! error TS2345:   Types of property 'name' are incompatible.
 !!! error TS2345:     Type 'boolean' is not assignable to type 'string'.
     foo({ name: "hello" });            // Error, id required but missing
         ~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ name: string; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
-!!! error TS2345:   Property 'id' is missing in type '{ name: string; }'.
\ No newline at end of file
+!!! error TS2345: Argument of type '{ name: "hello"; }' is not assignable to parameter of type '{ id: number; name?: string; }'.
+!!! error TS2345:   Property 'id' is missing in type '{ name: "hello"; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.types b/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.types
index 1f1beea0b38c6..f407fedede474 100644
--- a/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.types
+++ b/tests/baselines/reference/assignmentCompatFunctionsWithOptionalArgs.types
@@ -8,14 +8,14 @@ function foo(x: { id: number; name?: string; }): void;
 foo({ id: 1234 });                 // Ok
 >foo({ id: 1234 }) : void
 >foo : (x: { id: number; name?: string; }) => void
->{ id: 1234 } : { id: number; }
+>{ id: 1234 } : { id: 1234; }
 >id : number
 >1234 : 1234
 
 foo({ id: 1234, name: "hello" });  // Ok
 >foo({ id: 1234, name: "hello" }) : void
 >foo : (x: { id: number; name?: string; }) => void
->{ id: 1234, name: "hello" } : { id: number; name: string; }
+>{ id: 1234, name: "hello" } : { id: 1234; name: "hello"; }
 >id : number
 >1234 : 1234
 >name : string
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.types b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.types
index 1bb87d3255f9c..730c83eb44d25 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.types
+++ b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithOptionalParameters.types
@@ -38,15 +38,15 @@ var a: () => number;
 >a : () => number
 
     a = () => 1 // ok, same number of required params
->a = () => 1 : () => number
+>a = () => 1 : () => 1
 >a : () => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a = (x?: number) => 1; // ok, same number of required params
->a = (x?: number) => 1 : (x?: number) => number
+>a = (x?: number) => 1 : (x?: number) => 1
 >a : () => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
@@ -104,22 +104,22 @@ var a2: (x?: number) => number;
 >x : number
 
     a2 = () => 1; // ok, same number of required params
->a2 = () => 1 : () => number
+>a2 = () => 1 : () => 1
 >a2 : (x?: number) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a2 = (x?: number) => 1; // ok, same number of required params
->a2 = (x?: number) => 1 : (x?: number) => number
+>a2 = (x?: number) => 1 : (x?: number) => 1
 >a2 : (x?: number) => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
     a2 = (x: number) => 1; // ok, same number of params
->a2 = (x: number) => 1 : (x: number) => number
+>a2 = (x: number) => 1 : (x: number) => 1
 >a2 : (x?: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
@@ -170,22 +170,22 @@ var a3: (x: number) => number;
 >x : number
 
     a3 = () => 1; // ok, fewer required params
->a3 = () => 1 : () => number
+>a3 = () => 1 : () => 1
 >a3 : (x: number) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a3 = (x?: number) => 1; // ok, fewer required params
->a3 = (x?: number) => 1 : (x?: number) => number
+>a3 = (x?: number) => 1 : (x?: number) => 1
 >a3 : (x: number) => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
     a3 = (x: number) => 1; // ok, same number of required params
->a3 = (x: number) => 1 : (x: number) => number
+>a3 = (x: number) => 1 : (x: number) => 1
 >a3 : (x: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
@@ -245,30 +245,30 @@ var a4: (x: number, y?: number) => number;
 >y : number
 
     a4 = () => 1; // ok, fewer required params
->a4 = () => 1 : () => number
+>a4 = () => 1 : () => 1
 >a4 : (x: number, y?: number) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a4 = (x?: number, y?: number) => 1; // ok, fewer required params
->a4 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>a4 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >a4 : (x: number, y?: number) => number
->(x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>(x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >x : number
 >y : number
 >1 : 1
 
     a4 = (x: number) => 1; // ok, same number of required params
->a4 = (x: number) => 1 : (x: number) => number
+>a4 = (x: number) => 1 : (x: number) => 1
 >a4 : (x: number, y?: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a4 = (x: number, y: number) => 1; // ok, same number of params
->a4 = (x: number, y: number) => 1 : (x: number, y: number) => number
+>a4 = (x: number, y: number) => 1 : (x: number, y: number) => 1
 >a4 : (x: number, y?: number) => number
->(x: number, y: number) => 1 : (x: number, y: number) => number
+>(x: number, y: number) => 1 : (x: number, y: number) => 1
 >x : number
 >y : number
 >1 : 1
@@ -321,30 +321,30 @@ var a5: (x?: number, y?: number) => number;
 >y : number
 
     a5 = () => 1; // ok, fewer required params
->a5 = () => 1 : () => number
+>a5 = () => 1 : () => 1
 >a5 : (x?: number, y?: number) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a5 = (x?: number, y?: number) => 1; // ok, fewer required params
->a5 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>a5 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >a5 : (x?: number, y?: number) => number
->(x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>(x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >x : number
 >y : number
 >1 : 1
 
     a5 = (x: number) => 1; // ok, fewer params in lambda
->a5 = (x: number) => 1 : (x: number) => number
+>a5 = (x: number) => 1 : (x: number) => 1
 >a5 : (x?: number, y?: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a5 = (x: number, y: number) => 1;  // ok, same number of params
->a5 = (x: number, y: number) => 1 : (x: number, y: number) => number
+>a5 = (x: number, y: number) => 1 : (x: number, y: number) => 1
 >a5 : (x?: number, y?: number) => number
->(x: number, y: number) => 1 : (x: number, y: number) => number
+>(x: number, y: number) => 1 : (x: number, y: number) => 1
 >x : number
 >y : number
 >1 : 1
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.errors.txt b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.errors.txt
index 6b563ef26312e..e56968a548218 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.errors.txt
+++ b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.errors.txt
@@ -1,28 +1,28 @@
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(13,5): error TS2322: Type '(...args: string[]) => number' is not assignable to type '(...args: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(13,5): error TS2322: Type '(...args: string[]) => 1' is not assignable to type '(...args: number[]) => number'.
   Types of parameters 'args' and 'args' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(17,5): error TS2322: Type '(x?: string) => number' is not assignable to type '(...args: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(17,5): error TS2322: Type '(x?: string) => 1' is not assignable to type '(...args: number[]) => number'.
   Types of parameters 'x' and 'args' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(26,5): error TS2322: Type '(x: number, ...args: string[]) => number' is not assignable to type '(x: number, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(26,5): error TS2322: Type '(x: number, ...args: string[]) => 1' is not assignable to type '(x: number, ...z: number[]) => number'.
   Types of parameters 'args' and 'z' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(35,5): error TS2322: Type '(x: number, y?: number, z?: number) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(35,5): error TS2322: Type '(x: number, y?: number, z?: number) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'y' and 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(36,5): error TS2322: Type '(x: number, ...z: number[]) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(36,5): error TS2322: Type '(x: number, ...z: number[]) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'z' and 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(37,5): error TS2322: Type '(x: string, y?: string, z?: string) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(37,5): error TS2322: Type '(x: string, y?: string, z?: string) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'x' and 'x' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(41,5): error TS2322: Type '(x?: number, y?: number) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(41,5): error TS2322: Type '(x?: number, y?: number) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'y' and 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(43,5): error TS2322: Type '(x: number, y?: number) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(43,5): error TS2322: Type '(x: number, y?: number) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'y' and 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(45,5): error TS2322: Type '(x: number, ...args: string[]) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignmentCompatWithCallSignaturesWithRestParameters.ts(45,5): error TS2322: Type '(x: number, ...args: string[]) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
   Types of parameters 'args' and 'z' are incompatible.
     Type 'number' is not assignable to type 'string'.
 
@@ -42,7 +42,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
         a = (...args: number[]) => 1; // ok, same number of required params
         a = (...args: string[]) => 1; // error, type mismatch
         ~
-!!! error TS2322: Type '(...args: string[]) => number' is not assignable to type '(...args: number[]) => number'.
+!!! error TS2322: Type '(...args: string[]) => 1' is not assignable to type '(...args: number[]) => number'.
 !!! error TS2322:   Types of parameters 'args' and 'args' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
         a = (x?: number) => 1; // ok, same number of required params
@@ -50,7 +50,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
         a = (x: number) => 1; // ok, rest param corresponds to infinite number of params
         a = (x?: string) => 1; // error, incompatible type
         ~
-!!! error TS2322: Type '(x?: string) => number' is not assignable to type '(...args: number[]) => number'.
+!!! error TS2322: Type '(x?: string) => 1' is not assignable to type '(...args: number[]) => number'.
 !!! error TS2322:   Types of parameters 'x' and 'args' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
     
@@ -63,7 +63,7 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
         a2 = (x: number, ...args: number[]) => 1; // ok, same number of required params
         a2 = (x: number, ...args: string[]) => 1; // should be type mismatch error
         ~~
-!!! error TS2322: Type '(x: number, ...args: string[]) => number' is not assignable to type '(x: number, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: number, ...args: string[]) => 1' is not assignable to type '(x: number, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'args' and 'z' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
         a2 = (x: number, y: number) => 1; // ok, rest param corresponds to infinite number of params
@@ -76,17 +76,17 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
         a3 = (x: number, y: string) => 1;  // ok, all present params match
         a3 = (x: number, y?: number, z?: number) => 1;  // error
         ~~
-!!! error TS2322: Type '(x: number, y?: number, z?: number) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: number, y?: number, z?: number) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'y' and 'y' are incompatible.
 !!! error TS2322:     Type 'string' is not assignable to type 'number'.
         a3 = (x: number, ...z: number[]) => 1;  // error
         ~~
-!!! error TS2322: Type '(x: number, ...z: number[]) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: number, ...z: number[]) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'z' and 'y' are incompatible.
 !!! error TS2322:     Type 'string' is not assignable to type 'number'.
         a3 = (x: string, y?: string, z?: string) => 1;  // error
         ~~
-!!! error TS2322: Type '(x: string, y?: string, z?: string) => number' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: string, y?: string, z?: string) => 1' is not assignable to type '(x: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'x' and 'x' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
     
@@ -94,18 +94,18 @@ tests/cases/conformance/types/typeRelationships/assignmentCompatibility/assignme
         a4 = () => 1; // ok, fewer required params
         a4 = (x?: number, y?: number) => 1; // error, type mismatch
         ~~
-!!! error TS2322: Type '(x?: number, y?: number) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x?: number, y?: number) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'y' and 'y' are incompatible.
 !!! error TS2322:     Type 'string' is not assignable to type 'number'.
         a4 = (x: number) => 1; // ok, all present params match
         a4 = (x: number, y?: number) => 1;  // error, second param has type mismatch
         ~~
-!!! error TS2322: Type '(x: number, y?: number) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: number, y?: number) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'y' and 'y' are incompatible.
 !!! error TS2322:     Type 'string' is not assignable to type 'number'.
         a4 = (x?: number, y?: string) => 1;  // ok, same number of required params with matching types
         a4 = (x: number, ...args: string[]) => 1;  // error, rest params have type mismatch
         ~~
-!!! error TS2322: Type '(x: number, ...args: string[]) => number' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
+!!! error TS2322: Type '(x: number, ...args: string[]) => 1' is not assignable to type '(x?: number, y?: string, ...z: number[]) => number'.
 !!! error TS2322:   Types of parameters 'args' and 'z' are incompatible.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.types b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.types
index a2c726527cb0f..755b105b0f663 100644
--- a/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.types
+++ b/tests/baselines/reference/assignmentCompatWithCallSignaturesWithRestParameters.types
@@ -31,52 +31,52 @@ var a: (...args: number[]) => number; // ok, same number of required params
 >args : number[]
 
     a = () => 1; // ok, same number of required params
->a = () => 1 : () => number
+>a = () => 1 : () => 1
 >a : (...args: number[]) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a = (...args: number[]) => 1; // ok, same number of required params
->a = (...args: number[]) => 1 : (...args: number[]) => number
+>a = (...args: number[]) => 1 : (...args: number[]) => 1
 >a : (...args: number[]) => number
->(...args: number[]) => 1 : (...args: number[]) => number
+>(...args: number[]) => 1 : (...args: number[]) => 1
 >args : number[]
 >1 : 1
 
     a = (...args: string[]) => 1; // error, type mismatch
->a = (...args: string[]) => 1 : (...args: string[]) => number
+>a = (...args: string[]) => 1 : (...args: string[]) => 1
 >a : (...args: number[]) => number
->(...args: string[]) => 1 : (...args: string[]) => number
+>(...args: string[]) => 1 : (...args: string[]) => 1
 >args : string[]
 >1 : 1
 
     a = (x?: number) => 1; // ok, same number of required params
->a = (x?: number) => 1 : (x?: number) => number
+>a = (x?: number) => 1 : (x?: number) => 1
 >a : (...args: number[]) => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
     a = (x?: number, y?: number, z?: number) => 1; // ok, same number of required params
->a = (x?: number, y?: number, z?: number) => 1 : (x?: number, y?: number, z?: number) => number
+>a = (x?: number, y?: number, z?: number) => 1 : (x?: number, y?: number, z?: number) => 1
 >a : (...args: number[]) => number
->(x?: number, y?: number, z?: number) => 1 : (x?: number, y?: number, z?: number) => number
+>(x?: number, y?: number, z?: number) => 1 : (x?: number, y?: number, z?: number) => 1
 >x : number
 >y : number
 >z : number
 >1 : 1
 
     a = (x: number) => 1; // ok, rest param corresponds to infinite number of params
->a = (x: number) => 1 : (x: number) => number
+>a = (x: number) => 1 : (x: number) => 1
 >a : (...args: number[]) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a = (x?: string) => 1; // error, incompatible type
->a = (x?: string) => 1 : (x?: string) => number
+>a = (x?: string) => 1 : (x?: string) => 1
 >a : (...args: number[]) => number
->(x?: string) => 1 : (x?: string) => number
+>(x?: string) => 1 : (x?: string) => 1
 >x : string
 >1 : 1
 
@@ -87,60 +87,60 @@ var a2: (x: number, ...z: number[]) => number;
 >z : number[]
 
     a2 = () => 1; // ok, fewer required params
->a2 = () => 1 : () => number
+>a2 = () => 1 : () => 1
 >a2 : (x: number, ...z: number[]) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a2 = (...args: number[]) => 1; // ok, fewer required params
->a2 = (...args: number[]) => 1 : (...args: number[]) => number
+>a2 = (...args: number[]) => 1 : (...args: number[]) => 1
 >a2 : (x: number, ...z: number[]) => number
->(...args: number[]) => 1 : (...args: number[]) => number
+>(...args: number[]) => 1 : (...args: number[]) => 1
 >args : number[]
 >1 : 1
 
     a2 = (x?: number) => 1; // ok, fewer required params
->a2 = (x?: number) => 1 : (x?: number) => number
+>a2 = (x?: number) => 1 : (x?: number) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
     a2 = (x: number) => 1; // ok, same number of required params
->a2 = (x: number) => 1 : (x: number) => number
+>a2 = (x: number) => 1 : (x: number) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a2 = (x: number, ...args: number[]) => 1; // ok, same number of required params
->a2 = (x: number, ...args: number[]) => 1 : (x: number, ...args: number[]) => number
+>a2 = (x: number, ...args: number[]) => 1 : (x: number, ...args: number[]) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x: number, ...args: number[]) => 1 : (x: number, ...args: number[]) => number
+>(x: number, ...args: number[]) => 1 : (x: number, ...args: number[]) => 1
 >x : number
 >args : number[]
 >1 : 1
 
     a2 = (x: number, ...args: string[]) => 1; // should be type mismatch error
->a2 = (x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => number
+>a2 = (x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => number
+>(x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => 1
 >x : number
 >args : string[]
 >1 : 1
 
     a2 = (x: number, y: number) => 1; // ok, rest param corresponds to infinite number of params
->a2 = (x: number, y: number) => 1 : (x: number, y: number) => number
+>a2 = (x: number, y: number) => 1 : (x: number, y: number) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x: number, y: number) => 1 : (x: number, y: number) => number
+>(x: number, y: number) => 1 : (x: number, y: number) => 1
 >x : number
 >y : number
 >1 : 1
 
     a2 = (x: number, y?: number) => 1; // ok, same number of required params
->a2 = (x: number, y?: number) => 1 : (x: number, y?: number) => number
+>a2 = (x: number, y?: number) => 1 : (x: number, y?: number) => 1
 >a2 : (x: number, ...z: number[]) => number
->(x: number, y?: number) => 1 : (x: number, y?: number) => number
+>(x: number, y?: number) => 1 : (x: number, y?: number) => 1
 >x : number
 >y : number
 >1 : 1
@@ -152,54 +152,54 @@ var a3: (x: number, y?: string, ...z: number[]) => number;
 >z : number[]
 
     a3 = () => 1; // ok, fewer required params
->a3 = () => 1 : () => number
+>a3 = () => 1 : () => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a3 = (x?: number) => 1; // ok, fewer required params
->a3 = (x?: number) => 1 : (x?: number) => number
+>a3 = (x?: number) => 1 : (x?: number) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x?: number) => 1 : (x?: number) => number
+>(x?: number) => 1 : (x?: number) => 1
 >x : number
 >1 : 1
 
     a3 = (x: number) => 1; // ok, same number of required params
->a3 = (x: number) => 1 : (x: number) => number
+>a3 = (x: number) => 1 : (x: number) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a3 = (x: number, y: string) => 1;  // ok, all present params match
->a3 = (x: number, y: string) => 1 : (x: number, y: string) => number
+>a3 = (x: number, y: string) => 1 : (x: number, y: string) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x: number, y: string) => 1 : (x: number, y: string) => number
+>(x: number, y: string) => 1 : (x: number, y: string) => 1
 >x : number
 >y : string
 >1 : 1
 
     a3 = (x: number, y?: number, z?: number) => 1;  // error
->a3 = (x: number, y?: number, z?: number) => 1 : (x: number, y?: number, z?: number) => number
+>a3 = (x: number, y?: number, z?: number) => 1 : (x: number, y?: number, z?: number) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x: number, y?: number, z?: number) => 1 : (x: number, y?: number, z?: number) => number
+>(x: number, y?: number, z?: number) => 1 : (x: number, y?: number, z?: number) => 1
 >x : number
 >y : number
 >z : number
 >1 : 1
 
     a3 = (x: number, ...z: number[]) => 1;  // error
->a3 = (x: number, ...z: number[]) => 1 : (x: number, ...z: number[]) => number
+>a3 = (x: number, ...z: number[]) => 1 : (x: number, ...z: number[]) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x: number, ...z: number[]) => 1 : (x: number, ...z: number[]) => number
+>(x: number, ...z: number[]) => 1 : (x: number, ...z: number[]) => 1
 >x : number
 >z : number[]
 >1 : 1
 
     a3 = (x: string, y?: string, z?: string) => 1;  // error
->a3 = (x: string, y?: string, z?: string) => 1 : (x: string, y?: string, z?: string) => number
+>a3 = (x: string, y?: string, z?: string) => 1 : (x: string, y?: string, z?: string) => 1
 >a3 : (x: number, y?: string, ...z: number[]) => number
->(x: string, y?: string, z?: string) => 1 : (x: string, y?: string, z?: string) => number
+>(x: string, y?: string, z?: string) => 1 : (x: string, y?: string, z?: string) => 1
 >x : string
 >y : string
 >z : string
@@ -212,46 +212,46 @@ var a4: (x?: number, y?: string, ...z: number[]) => number;
 >z : number[]
 
     a4 = () => 1; // ok, fewer required params
->a4 = () => 1 : () => number
+>a4 = () => 1 : () => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
     a4 = (x?: number, y?: number) => 1; // error, type mismatch
->a4 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>a4 = (x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->(x?: number, y?: number) => 1 : (x?: number, y?: number) => number
+>(x?: number, y?: number) => 1 : (x?: number, y?: number) => 1
 >x : number
 >y : number
 >1 : 1
 
     a4 = (x: number) => 1; // ok, all present params match
->a4 = (x: number) => 1 : (x: number) => number
+>a4 = (x: number) => 1 : (x: number) => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
     a4 = (x: number, y?: number) => 1;  // error, second param has type mismatch
->a4 = (x: number, y?: number) => 1 : (x: number, y?: number) => number
+>a4 = (x: number, y?: number) => 1 : (x: number, y?: number) => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->(x: number, y?: number) => 1 : (x: number, y?: number) => number
+>(x: number, y?: number) => 1 : (x: number, y?: number) => 1
 >x : number
 >y : number
 >1 : 1
 
     a4 = (x?: number, y?: string) => 1;  // ok, same number of required params with matching types
->a4 = (x?: number, y?: string) => 1 : (x?: number, y?: string) => number
+>a4 = (x?: number, y?: string) => 1 : (x?: number, y?: string) => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->(x?: number, y?: string) => 1 : (x?: number, y?: string) => number
+>(x?: number, y?: string) => 1 : (x?: number, y?: string) => 1
 >x : number
 >y : string
 >1 : 1
 
     a4 = (x: number, ...args: string[]) => 1;  // error, rest params have type mismatch
->a4 = (x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => number
+>a4 = (x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => 1
 >a4 : (x?: number, y?: string, ...z: number[]) => number
->(x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => number
+>(x: number, ...args: string[]) => 1 : (x: number, ...args: string[]) => 1
 >x : number
 >args : string[]
 >1 : 1
diff --git a/tests/baselines/reference/assignmentCompatWithObjectMembers3.types b/tests/baselines/reference/assignmentCompatWithObjectMembers3.types
index 88eadd4c36ac8..6929e92e89452 100644
--- a/tests/baselines/reference/assignmentCompatWithObjectMembers3.types
+++ b/tests/baselines/reference/assignmentCompatWithObjectMembers3.types
@@ -51,14 +51,14 @@ var b: { foo: string; baz?: string }
 var a2: S2 = { foo: '' };
 >a2 : S2
 >S2 : S2
->{ foo: '' } : { foo: string; }
+>{ foo: '' } : { foo: ""; }
 >foo : string
 >'' : ""
 
 var b2: T2 = { foo: '' };
 >b2 : T2
 >T2 : T2
->{ foo: '' } : { foo: string; }
+>{ foo: '' } : { foo: ""; }
 >foo : string
 >'' : ""
 
diff --git a/tests/baselines/reference/assignmentCompatability1.types b/tests/baselines/reference/assignmentCompatability1.types
index 6f47a6e5244ce..e2facb75b2a85 100644
--- a/tests/baselines/reference/assignmentCompatability1.types
+++ b/tests/baselines/reference/assignmentCompatability1.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability10.types b/tests/baselines/reference/assignmentCompatability10.types
index 9784acfdabc75..66cd3a72c1074 100644
--- a/tests/baselines/reference/assignmentCompatability10.types
+++ b/tests/baselines/reference/assignmentCompatability10.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability11.types b/tests/baselines/reference/assignmentCompatability11.types
index d035fe7408444..7e2e9f22a0409 100644
--- a/tests/baselines/reference/assignmentCompatability11.types
+++ b/tests/baselines/reference/assignmentCompatability11.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability12.types b/tests/baselines/reference/assignmentCompatability12.types
index 34e83a7dc4444..a5db9f623ffad 100644
--- a/tests/baselines/reference/assignmentCompatability12.types
+++ b/tests/baselines/reference/assignmentCompatability12.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability13.types b/tests/baselines/reference/assignmentCompatability13.types
index 3ee0e4a15b5c6..7579edc27d755 100644
--- a/tests/baselines/reference/assignmentCompatability13.types
+++ b/tests/baselines/reference/assignmentCompatability13.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability14.types b/tests/baselines/reference/assignmentCompatability14.types
index 0eee6b216952c..c5a380326f108 100644
--- a/tests/baselines/reference/assignmentCompatability14.types
+++ b/tests/baselines/reference/assignmentCompatability14.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability15.types b/tests/baselines/reference/assignmentCompatability15.types
index 426c55f55dc58..6fbdde8d3c8a6 100644
--- a/tests/baselines/reference/assignmentCompatability15.types
+++ b/tests/baselines/reference/assignmentCompatability15.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability16.types b/tests/baselines/reference/assignmentCompatability16.types
index bc37bd93de635..7300d4d117a89 100644
--- a/tests/baselines/reference/assignmentCompatability16.types
+++ b/tests/baselines/reference/assignmentCompatability16.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability17.types b/tests/baselines/reference/assignmentCompatability17.types
index b6d6854d8a91a..42ad8c0a90b1f 100644
--- a/tests/baselines/reference/assignmentCompatability17.types
+++ b/tests/baselines/reference/assignmentCompatability17.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability18.types b/tests/baselines/reference/assignmentCompatability18.types
index cae2094c99299..218df595db002 100644
--- a/tests/baselines/reference/assignmentCompatability18.types
+++ b/tests/baselines/reference/assignmentCompatability18.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability19.types b/tests/baselines/reference/assignmentCompatability19.types
index 41fad382aa596..87ab7000aa333 100644
--- a/tests/baselines/reference/assignmentCompatability19.types
+++ b/tests/baselines/reference/assignmentCompatability19.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability2.types b/tests/baselines/reference/assignmentCompatability2.types
index 58fb86b5c7f1c..4a070940b4fe9 100644
--- a/tests/baselines/reference/assignmentCompatability2.types
+++ b/tests/baselines/reference/assignmentCompatability2.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability20.types b/tests/baselines/reference/assignmentCompatability20.types
index 666ad22e6812f..53ab9ddbe32ac 100644
--- a/tests/baselines/reference/assignmentCompatability20.types
+++ b/tests/baselines/reference/assignmentCompatability20.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability21.types b/tests/baselines/reference/assignmentCompatability21.types
index 2b0c8e90b7b24..67edab5edbd69 100644
--- a/tests/baselines/reference/assignmentCompatability21.types
+++ b/tests/baselines/reference/assignmentCompatability21.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability22.types b/tests/baselines/reference/assignmentCompatability22.types
index d94f7b51ee77b..ef8277571f4c9 100644
--- a/tests/baselines/reference/assignmentCompatability22.types
+++ b/tests/baselines/reference/assignmentCompatability22.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability23.types b/tests/baselines/reference/assignmentCompatability23.types
index 8c3f1155f71e4..74c926854b64d 100644
--- a/tests/baselines/reference/assignmentCompatability23.types
+++ b/tests/baselines/reference/assignmentCompatability23.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability24.types b/tests/baselines/reference/assignmentCompatability24.types
index 63fccee0c1ce1..cd2bda6bca871 100644
--- a/tests/baselines/reference/assignmentCompatability24.types
+++ b/tests/baselines/reference/assignmentCompatability24.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability25.types b/tests/baselines/reference/assignmentCompatability25.types
index 3f24a798d65c5..4bd23458cbe11 100644
--- a/tests/baselines/reference/assignmentCompatability25.types
+++ b/tests/baselines/reference/assignmentCompatability25.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability26.types b/tests/baselines/reference/assignmentCompatability26.types
index 9653a606705ad..c11a4656fe3a4 100644
--- a/tests/baselines/reference/assignmentCompatability26.types
+++ b/tests/baselines/reference/assignmentCompatability26.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability27.types b/tests/baselines/reference/assignmentCompatability27.types
index c04554e5764e9..6ecd689252db5 100644
--- a/tests/baselines/reference/assignmentCompatability27.types
+++ b/tests/baselines/reference/assignmentCompatability27.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability28.types b/tests/baselines/reference/assignmentCompatability28.types
index bdf277b0664de..f578fd2e4fe09 100644
--- a/tests/baselines/reference/assignmentCompatability28.types
+++ b/tests/baselines/reference/assignmentCompatability28.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability29.types b/tests/baselines/reference/assignmentCompatability29.types
index 7a87e4f8bee1f..6851063e5158d 100644
--- a/tests/baselines/reference/assignmentCompatability29.types
+++ b/tests/baselines/reference/assignmentCompatability29.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability3.types b/tests/baselines/reference/assignmentCompatability3.types
index 4525500cfec16..da58a3c7ea820 100644
--- a/tests/baselines/reference/assignmentCompatability3.types
+++ b/tests/baselines/reference/assignmentCompatability3.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability30.types b/tests/baselines/reference/assignmentCompatability30.types
index ca541edb5548b..8e50ef418bb7b 100644
--- a/tests/baselines/reference/assignmentCompatability30.types
+++ b/tests/baselines/reference/assignmentCompatability30.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability31.types b/tests/baselines/reference/assignmentCompatability31.types
index 2c4ec726bcb48..2efc40f1c4ab2 100644
--- a/tests/baselines/reference/assignmentCompatability31.types
+++ b/tests/baselines/reference/assignmentCompatability31.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability32.types b/tests/baselines/reference/assignmentCompatability32.types
index e7e9c3ef929dd..27fd212b76ecb 100644
--- a/tests/baselines/reference/assignmentCompatability32.types
+++ b/tests/baselines/reference/assignmentCompatability32.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability33.types b/tests/baselines/reference/assignmentCompatability33.types
index 9420c0f1bc995..d45061fabe730 100644
--- a/tests/baselines/reference/assignmentCompatability33.types
+++ b/tests/baselines/reference/assignmentCompatability33.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability34.types b/tests/baselines/reference/assignmentCompatability34.types
index 323dd84c787ba..040a079820398 100644
--- a/tests/baselines/reference/assignmentCompatability34.types
+++ b/tests/baselines/reference/assignmentCompatability34.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability35.types b/tests/baselines/reference/assignmentCompatability35.types
index 50da60fd0d928..3e0b639c9309b 100644
--- a/tests/baselines/reference/assignmentCompatability35.types
+++ b/tests/baselines/reference/assignmentCompatability35.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability36.types b/tests/baselines/reference/assignmentCompatability36.types
index 59ccc04195fbf..0d3402cd9788b 100644
--- a/tests/baselines/reference/assignmentCompatability36.types
+++ b/tests/baselines/reference/assignmentCompatability36.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability37.types b/tests/baselines/reference/assignmentCompatability37.types
index 44f1b7d120b0d..1835fa49fdb32 100644
--- a/tests/baselines/reference/assignmentCompatability37.types
+++ b/tests/baselines/reference/assignmentCompatability37.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability38.types b/tests/baselines/reference/assignmentCompatability38.types
index ae23533fb0891..fe05af57cbafe 100644
--- a/tests/baselines/reference/assignmentCompatability38.types
+++ b/tests/baselines/reference/assignmentCompatability38.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability39.types b/tests/baselines/reference/assignmentCompatability39.types
index 9621c62d07c51..a386a9234bfbe 100644
--- a/tests/baselines/reference/assignmentCompatability39.types
+++ b/tests/baselines/reference/assignmentCompatability39.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability4.types b/tests/baselines/reference/assignmentCompatability4.types
index bc5e805875c1d..c22c59cb22856 100644
--- a/tests/baselines/reference/assignmentCompatability4.types
+++ b/tests/baselines/reference/assignmentCompatability4.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability40.types b/tests/baselines/reference/assignmentCompatability40.types
index 31a598ffe2583..2aa5c13ce21ca 100644
--- a/tests/baselines/reference/assignmentCompatability40.types
+++ b/tests/baselines/reference/assignmentCompatability40.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability41.types b/tests/baselines/reference/assignmentCompatability41.types
index 343cd4e81b68b..ffe0abbfa13bc 100644
--- a/tests/baselines/reference/assignmentCompatability41.types
+++ b/tests/baselines/reference/assignmentCompatability41.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability42.types b/tests/baselines/reference/assignmentCompatability42.types
index 168d718e1e43a..fe5abae58885a 100644
--- a/tests/baselines/reference/assignmentCompatability42.types
+++ b/tests/baselines/reference/assignmentCompatability42.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability43.types b/tests/baselines/reference/assignmentCompatability43.types
index 8693eb35fbe72..d376f230854b1 100644
--- a/tests/baselines/reference/assignmentCompatability43.types
+++ b/tests/baselines/reference/assignmentCompatability43.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
@@ -33,7 +33,7 @@ module __test2__ {
 >U : U
 >obj2 : interfaceTwo<number, string>
 >interfaceTwo : interfaceTwo<T, U>
->{ one: 1, two: "a" } : { one: number; two: string; }
+>{ one: 1, two: "a" } : { one: 1; two: "a"; }
 >one : number
 >1 : 1
 >two : string
diff --git a/tests/baselines/reference/assignmentCompatability5.types b/tests/baselines/reference/assignmentCompatability5.types
index 755ce16ec69cf..9c1c3d12f667a 100644
--- a/tests/baselines/reference/assignmentCompatability5.types
+++ b/tests/baselines/reference/assignmentCompatability5.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
@@ -30,7 +30,7 @@ module __test2__ {
 >T : T
 >obj1 : interfaceOne<number>
 >interfaceOne : interfaceOne<T>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability6.types b/tests/baselines/reference/assignmentCompatability6.types
index d437d5a746962..86510f180d4cc 100644
--- a/tests/baselines/reference/assignmentCompatability6.types
+++ b/tests/baselines/reference/assignmentCompatability6.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability7.types b/tests/baselines/reference/assignmentCompatability7.types
index 3dad9966d836a..525e45ac0cd5d 100644
--- a/tests/baselines/reference/assignmentCompatability7.types
+++ b/tests/baselines/reference/assignmentCompatability7.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
@@ -33,7 +33,7 @@ module __test2__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability8.types b/tests/baselines/reference/assignmentCompatability8.types
index d4cc5ebc33e7d..df0171a258aa2 100644
--- a/tests/baselines/reference/assignmentCompatability8.types
+++ b/tests/baselines/reference/assignmentCompatability8.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentCompatability9.types b/tests/baselines/reference/assignmentCompatability9.types
index 671697f35f716..f9faac91f67cd 100644
--- a/tests/baselines/reference/assignmentCompatability9.types
+++ b/tests/baselines/reference/assignmentCompatability9.types
@@ -12,7 +12,7 @@ module __test1__ {
 >U : U
 >obj4 : interfaceWithPublicAndOptional<number, string>
 >interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
->{ one: 1 } : { one: number; }
+>{ one: 1 } : { one: 1; }
 >one : number
 >1 : 1
 
diff --git a/tests/baselines/reference/assignmentToObjectAndFunction.types b/tests/baselines/reference/assignmentToObjectAndFunction.types
index d7c6a4f4b1299..17c0e76d61d2e 100644
--- a/tests/baselines/reference/assignmentToObjectAndFunction.types
+++ b/tests/baselines/reference/assignmentToObjectAndFunction.types
@@ -9,10 +9,10 @@ var errObj: Object = { toString: 0 }; // Error, incompatible toString
 var goodObj: Object = {
 >goodObj : Object
 >Object : Object
->{    toString(x?) {        return "";    }} : { toString(x?: any): string; }
+>{    toString(x?) {        return "";    }} : { toString(x?: any): ""; }
 
     toString(x?) {
->toString : (x?: any) => string
+>toString : (x?: any) => ""
 >x : any
 
         return "";
diff --git a/tests/baselines/reference/assignmentToParenthesizedIdentifiers.types b/tests/baselines/reference/assignmentToParenthesizedIdentifiers.types
index ab95fb8cb2f21..9742043aa6118 100644
--- a/tests/baselines/reference/assignmentToParenthesizedIdentifiers.types
+++ b/tests/baselines/reference/assignmentToParenthesizedIdentifiers.types
@@ -109,31 +109,31 @@ module M2 {
 >3 : 3
 }
 M2.M3 = { x: 3 }; // OK
->M2.M3 = { x: 3 } : { x: number; }
+>M2.M3 = { x: 3 } : { x: 3; }
 >M2.M3 : typeof M2.M3
 >M2 : typeof M2
 >M3 : typeof M2.M3
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
 
 (M2).M3 = { x: 3 }; // OK
->(M2).M3 = { x: 3 } : { x: number; }
+>(M2).M3 = { x: 3 } : { x: 3; }
 >(M2).M3 : typeof M2.M3
 >(M2) : typeof M2
 >M2 : typeof M2
 >M3 : typeof M2.M3
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
 
 (M2.M3) = { x: 3 }; // OK
->(M2.M3) = { x: 3 } : { x: number; }
+>(M2.M3) = { x: 3 } : { x: 3; }
 >(M2.M3) : typeof M2.M3
 >M2.M3 : typeof M2.M3
 >M2 : typeof M2
 >M3 : typeof M2.M3
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
 
diff --git a/tests/baselines/reference/asyncFunctionReturnType.types b/tests/baselines/reference/asyncFunctionReturnType.types
index d1dab14ba87c6..82b0c9b248ab4 100644
--- a/tests/baselines/reference/asyncFunctionReturnType.types
+++ b/tests/baselines/reference/asyncFunctionReturnType.types
@@ -15,7 +15,7 @@ async function fAsyncExplicit(): Promise<[number, boolean]> {
 
     // This is contextually typed as a tuple.
     return [1, true];
->[1, true] : [number, true]
+>[1, true] : [1, true]
 >1 : 1
 >true : true
 }
diff --git a/tests/baselines/reference/bestCommonTypeOfTuple.types b/tests/baselines/reference/bestCommonTypeOfTuple.types
index d62503b57d612..7d4561c00bc33 100644
--- a/tests/baselines/reference/bestCommonTypeOfTuple.types
+++ b/tests/baselines/reference/bestCommonTypeOfTuple.types
@@ -61,16 +61,16 @@ t2 = [E1.one, E2.two];
 >two : E2
 
 t3 = [5, undefined];
->t3 = [5, undefined] : [number, undefined]
+>t3 = [5, undefined] : [5, undefined]
 >t3 : [number, any]
->[5, undefined] : [number, undefined]
+>[5, undefined] : [5, undefined]
 >5 : 5
 >undefined : undefined
 
 t4 = [E1.one, E2.two, 20];
->t4 = [E1.one, E2.two, 20] : [E1, E2, number]
+>t4 = [E1.one, E2.two, 20] : [E1, E2, 20]
 >t4 : [E1, E2, number]
->[E1.one, E2.two, 20] : [E1, E2, number]
+>[E1.one, E2.two, 20] : [E1, E2, 20]
 >E1.one : E1
 >E1 : typeof E1
 >one : E1
diff --git a/tests/baselines/reference/bitwiseNotOperatorWithNumberType.types b/tests/baselines/reference/bitwiseNotOperatorWithNumberType.types
index 8dc3c31867fc3..b9e69fdd21d8e 100644
--- a/tests/baselines/reference/bitwiseNotOperatorWithNumberType.types
+++ b/tests/baselines/reference/bitwiseNotOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/bitwiseNotOperatorWithStringType.types b/tests/baselines/reference/bitwiseNotOperatorWithStringType.types
index 130b52c84717d..166eb0393a153 100644
--- a/tests/baselines/reference/bitwiseNotOperatorWithStringType.types
+++ b/tests/baselines/reference/bitwiseNotOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/castTest.types b/tests/baselines/reference/castTest.types
index 4032aa8ac249a..eedabcd9ea695 100644
--- a/tests/baselines/reference/castTest.types
+++ b/tests/baselines/reference/castTest.types
@@ -70,8 +70,8 @@ var p_cast = <Point> ({
 >p_cast : Point
 ><Point> ({    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    },    mult: function(p) { return p; }}) : Point
 >Point : Point
->({    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    },    mult: function(p) { return p; }}) : { x: number; y: number; add: (dx: number, dy: number) => Point; mult: (p: Point) => Point; }
->{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    },    mult: function(p) { return p; }} : { x: number; y: number; add: (dx: number, dy: number) => Point; mult: (p: Point) => Point; }
+>({    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    },    mult: function(p) { return p; }}) : { x: 0; y: 0; add: (dx: number, dy: number) => Point; mult: (p: Point) => Point; }
+>{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    },    mult: function(p) { return p; }} : { x: 0; y: 0; add: (dx: number, dy: number) => Point; mult: (p: Point) => Point; }
 
     x: 0,
 >x : number
diff --git a/tests/baselines/reference/castingTuple.types b/tests/baselines/reference/castingTuple.types
index 0b9aa0a14870e..ed848b5327be4 100644
--- a/tests/baselines/reference/castingTuple.types
+++ b/tests/baselines/reference/castingTuple.types
@@ -38,7 +38,7 @@ enum E2 { one }
 // no error
 var numStrTuple: [number, string] = [5, "foo"];
 >numStrTuple : [number, string]
->[5, "foo"] : [number, string]
+>[5, "foo"] : [5, "foo"]
 >5 : 5
 >"foo" : "foo"
 
@@ -124,7 +124,7 @@ var array1 = <{}[]>emptyObjTuple;
 var unionTuple: [C, string | number] = [new C(), "foo"];
 >unionTuple : [C, string | number]
 >C : C
->[new C(), "foo"] : [C, string]
+>[new C(), "foo"] : [C, "foo"]
 >new C() : C
 >C : typeof C
 >"foo" : "foo"
@@ -133,7 +133,7 @@ var unionTuple2: [C, string | number, D] = [new C(), "foo", new D()];
 >unionTuple2 : [C, string | number, D]
 >C : C
 >D : D
->[new C(), "foo", new D()] : [C, string, D]
+>[new C(), "foo", new D()] : [C, "foo", D]
 >new C() : C
 >C : typeof C
 >"foo" : "foo"
@@ -142,7 +142,7 @@ var unionTuple2: [C, string | number, D] = [new C(), "foo", new D()];
 
 var unionTuple3: [number, string| number] = [10, "foo"]; 
 >unionTuple3 : [number, string | number]
->[10, "foo"] : [number, string]
+>[10, "foo"] : [10, "foo"]
 >10 : 10
 >"foo" : "foo"
 
diff --git a/tests/baselines/reference/checkJsdocTypedefInParamTag1.types b/tests/baselines/reference/checkJsdocTypedefInParamTag1.types
index b0847a71522b5..bd2ab0f64d94c 100644
--- a/tests/baselines/reference/checkJsdocTypedefInParamTag1.types
+++ b/tests/baselines/reference/checkJsdocTypedefInParamTag1.types
@@ -22,7 +22,7 @@ function foo(opts) {
 foo({x: 'abc'});
 >foo({x: 'abc'}) : void
 >foo : (opts: { x: string; y?: string; z?: string; w?: string; }) => void
->{x: 'abc'} : { x: string; }
+>{x: 'abc'} : { x: "abc"; }
 >x : string
 >'abc' : "abc"
 
@@ -46,7 +46,7 @@ function foo1(opts) {
 foo1({anotherX: "world"});
 >foo1({anotherX: "world"}) : void
 >foo1 : (opts: { anotherX: string; anotherY?: string; }) => void
->{anotherX: "world"} : { anotherX: string; }
+>{anotherX: "world"} : { anotherX: "world"; }
 >anotherX : string
 >"world" : "world"
 
@@ -71,7 +71,7 @@ function foo2(opts) {
 foo2({x: 'abc'});
 >foo2({x: 'abc'}) : void
 >foo2 : (opts: { x: string; y?: string; z?: string; w?: string; }) => void
->{x: 'abc'} : { x: string; }
+>{x: 'abc'} : { x: "abc"; }
 >x : string
 >'abc' : "abc"
 
diff --git a/tests/baselines/reference/computedPropertiesInDestructuring1.types b/tests/baselines/reference/computedPropertiesInDestructuring1.types
index efbcf0fb42a2f..7129c87475811 100644
--- a/tests/baselines/reference/computedPropertiesInDestructuring1.types
+++ b/tests/baselines/reference/computedPropertiesInDestructuring1.types
@@ -113,12 +113,12 @@ let [{[foo.toExponential()]: bar7}] = [{bar: "bar"}];
 >"bar" : "bar"
 
 ({["bar"]: bar2} = {bar: "bar"});
->({["bar"]: bar2} = {bar: "bar"}) : { bar: string; }
->{["bar"]: bar2} = {bar: "bar"} : { bar: string; }
+>({["bar"]: bar2} = {bar: "bar"}) : { bar: "bar"; }
+>{["bar"]: bar2} = {bar: "bar"} : { bar: "bar"; }
 >{["bar"]: bar2} : { ["bar"]: string; }
 >"bar" : "bar"
 >bar2 : string
->{bar: "bar"} : { bar: string; }
+>{bar: "bar"} : { bar: "bar"; }
 >bar : string
 >"bar" : "bar"
 
diff --git a/tests/baselines/reference/computedPropertiesInDestructuring1_ES6.types b/tests/baselines/reference/computedPropertiesInDestructuring1_ES6.types
index 79fb83720231c..67f2d8f9b4090 100644
--- a/tests/baselines/reference/computedPropertiesInDestructuring1_ES6.types
+++ b/tests/baselines/reference/computedPropertiesInDestructuring1_ES6.types
@@ -119,12 +119,12 @@ let [{[foo.toExponential()]: bar7}] = [{bar: "bar"}];
 >"bar" : "bar"
 
 ({["bar"]: bar2} = {bar: "bar"});
->({["bar"]: bar2} = {bar: "bar"}) : { bar: string; }
->{["bar"]: bar2} = {bar: "bar"} : { bar: string; }
+>({["bar"]: bar2} = {bar: "bar"}) : { bar: "bar"; }
+>{["bar"]: bar2} = {bar: "bar"} : { bar: "bar"; }
 >{["bar"]: bar2} : { ["bar"]: string; }
 >"bar" : "bar"
 >bar2 : string
->{bar: "bar"} : { bar: string; }
+>{bar: "bar"} : { bar: "bar"; }
 >bar : string
 >"bar" : "bar"
 
diff --git a/tests/baselines/reference/computedPropertyNames48_ES5.types b/tests/baselines/reference/computedPropertyNames48_ES5.types
index 25818fff967dd..2b71a9768e338 100644
--- a/tests/baselines/reference/computedPropertyNames48_ES5.types
+++ b/tests/baselines/reference/computedPropertyNames48_ES5.types
@@ -17,7 +17,7 @@ var a: any;
 extractIndexer({
 >extractIndexer({    [a]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    [a]: ""} : { [x: number]: string; }
+>{    [a]: ""} : { [x: number]: ""; }
 
     [a]: ""
 >a : any
@@ -28,7 +28,7 @@ extractIndexer({
 extractIndexer({
 >extractIndexer({    [E.x]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    [E.x]: ""} : { [E.x]: string; }
+>{    [E.x]: ""} : { [E.x]: ""; }
 
     [E.x]: ""
 >E.x : E
@@ -41,7 +41,7 @@ extractIndexer({
 extractIndexer({
 >extractIndexer({    ["" || 0]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    ["" || 0]: ""} : { ["" || 0]: string; }
+>{    ["" || 0]: ""} : { ["" || 0]: ""; }
 
     ["" || 0]: ""
 >"" || 0 : 0
diff --git a/tests/baselines/reference/computedPropertyNames48_ES6.types b/tests/baselines/reference/computedPropertyNames48_ES6.types
index 65f93239f30a9..577753a542591 100644
--- a/tests/baselines/reference/computedPropertyNames48_ES6.types
+++ b/tests/baselines/reference/computedPropertyNames48_ES6.types
@@ -17,7 +17,7 @@ var a: any;
 extractIndexer({
 >extractIndexer({    [a]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    [a]: ""} : { [x: number]: string; }
+>{    [a]: ""} : { [x: number]: ""; }
 
     [a]: ""
 >a : any
@@ -28,7 +28,7 @@ extractIndexer({
 extractIndexer({
 >extractIndexer({    [E.x]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    [E.x]: ""} : { [E.x]: string; }
+>{    [E.x]: ""} : { [E.x]: ""; }
 
     [E.x]: ""
 >E.x : E
@@ -41,7 +41,7 @@ extractIndexer({
 extractIndexer({
 >extractIndexer({    ["" || 0]: ""}) : string
 >extractIndexer : <T>(p: { [n: number]: T; }) => T
->{    ["" || 0]: ""} : { ["" || 0]: string; }
+>{    ["" || 0]: ""} : { ["" || 0]: ""; }
 
     ["" || 0]: ""
 >"" || 0 : 0
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.errors.txt
index f277df6f4c8f6..7fa95fe942616 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES5.ts(5,5): error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES5.ts(5,5): error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES5.ts (1 errors) ====
@@ -11,10 +11,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [+"foo"]: "",
         [+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.types
index ec75655aa5d95..15e596084a9b5 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType10_ES5.types
@@ -9,7 +9,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: "" | 0; }
+>{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: string | number; }
 
     [+"foo"]: "",
 >+"foo" : number
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.errors.txt
index 689ec135d3f10..116cd1a25311e 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES6.ts(5,5): error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES6.ts(5,5): error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType10_ES6.ts (1 errors) ====
@@ -11,10 +11,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [+"foo"]: "",
         [+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.types
index 4f61e710c8da0..251f5da73c157 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType10_ES6.types
@@ -9,7 +9,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: "" | 0; }
+>{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: string | number; }
 
     [+"foo"]: "",
 >+"foo" : number
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType6_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType6_ES5.types
index f144bb9d020e9..518fb38da1e8c 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType6_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType6_ES5.types
@@ -19,7 +19,7 @@ declare function foo<T>(obj: I<T>): T
 foo({
 >foo({    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | number | boolean | (() => void) | number[]
 >foo : <T>(obj: I<T>) => T
->{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: true | "" | (() => void) | 0 | number[]; [x: number]: (() => void) | 0 | number[]; p: ""; 0: () => void; }
+>{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: true | "" | (() => void) | 0 | 0[]; [x: number]: (() => void) | 0 | 0[]; p: ""; 0: () => void; }
 
     p: "",
 >p : string
@@ -43,7 +43,7 @@ foo({
     [+"hi"]: [0]
 >+"hi" : number
 >"hi" : "hi"
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 
 });
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType6_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType6_ES6.types
index 6b8c8ae2e34fc..bc106adde4e66 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType6_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType6_ES6.types
@@ -19,7 +19,7 @@ declare function foo<T>(obj: I<T>): T
 foo({
 >foo({    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | number | boolean | (() => void) | number[]
 >foo : <T>(obj: I<T>) => T
->{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: true | "" | (() => void) | 0 | number[]; [x: number]: (() => void) | 0 | number[]; p: ""; 0: () => void; }
+>{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: true | "" | (() => void) | 0 | 0[]; [x: number]: (() => void) | 0 | 0[]; p: ""; 0: () => void; }
 
     p: "",
 >p : string
@@ -43,7 +43,7 @@ foo({
     [+"hi"]: [0]
 >+"hi" : number
 >"hi" : "hi"
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 
 });
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
index b77a129a0b43e..c05bd64c8b08f 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
@@ -35,7 +35,7 @@ declare function g<T>(obj: J<T>): T;
 foo({
 >foo({    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : number | (() => void) | number[]
 >foo : <T>(obj: I<T>) => T
->{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: number | boolean | (() => void) | number[]; [x: number]: number | (() => void) | number[]; 0: () => void; }
+>{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: boolean | (() => void) | 0 | 0[]; [x: number]: (() => void) | 0 | 0[]; 0: () => void; }
 
     0: () => { },
 >() => { } : () => void
@@ -55,7 +55,7 @@ foo({
     [+"hi"]: [0]
 >+"hi" : number
 >"hi" : "hi"
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 
 });
@@ -63,7 +63,7 @@ foo({
 g({ p: "" });
 >g({ p: "" }) : string
 >g : <T>(obj: J<T>) => T
->{ p: "" } : { p: string; }
+>{ p: "" } : { p: ""; }
 >p : string
 >"" : ""
 
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
index f041b2b4eb49a..20beffaea26b6 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
@@ -35,7 +35,7 @@ declare function g<T>(obj: J<T>): T;
 foo({
 >foo({    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : number | (() => void) | number[]
 >foo : <T>(obj: I<T>) => T
->{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: number | boolean | (() => void) | number[]; [x: number]: number | (() => void) | number[]; 0: () => void; }
+>{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: boolean | (() => void) | 0 | 0[]; [x: number]: (() => void) | 0 | 0[]; 0: () => void; }
 
     0: () => { },
 >() => { } : () => void
@@ -55,7 +55,7 @@ foo({
     [+"hi"]: [0]
 >+"hi" : number
 >"hi" : "hi"
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 
 });
@@ -63,7 +63,7 @@ foo({
 g({ p: "" });
 >g({ p: "" }) : string
 >g : <T>(obj: J<T>) => T
->{ p: "" } : { p: string; }
+>{ p: "" } : { p: ""; }
 >p : string
 >"" : ""
 
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.errors.txt
index 6bfc98ae6a82a..ee36609095a04 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts(6,5): error TS2322: Type '{ [x: string]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts(6,5): error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES5.ts (1 errors) ====
@@ -12,10 +12,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: string]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [""+"foo"]: "",
         [""+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.types
index 290c8ed18155c..5bc49c6e86fe4 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType8_ES5.types
@@ -12,7 +12,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [""+"foo"]: "",    [""+"bar"]: 0} : { [x: string]: "" | 0; }
+>{    [""+"foo"]: "",    [""+"bar"]: 0} : { [x: string]: string | number; }
 
     [""+"foo"]: "",
 >""+"foo" : string
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.errors.txt
index 30f0b6f529e95..1048fd2e119e7 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts(6,5): error TS2322: Type '{ [x: string]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts(6,5): error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType8_ES6.ts (1 errors) ====
@@ -12,10 +12,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: string]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: string]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [""+"foo"]: "",
         [""+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.types
index cb2bb5b1c94f2..d8108935ac0dd 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType8_ES6.types
@@ -12,7 +12,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [""+"foo"]: "",    [""+"bar"]: 0} : { [x: string]: "" | 0; }
+>{    [""+"foo"]: "",    [""+"bar"]: 0} : { [x: string]: string | number; }
 
     [""+"foo"]: "",
 >""+"foo" : string
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.errors.txt
index 4f94dd3467f85..e76b3a704dc6e 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES5.ts(6,5): error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES5.ts(6,5): error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES5.ts (1 errors) ====
@@ -12,10 +12,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [+"foo"]: "",
         [+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.types
index 76aa8b00bc145..acadffbf76615 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType9_ES5.types
@@ -12,7 +12,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: "" | 0; }
+>{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: string | number; }
 
     [+"foo"]: "",
 >+"foo" : number
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.errors.txt b/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.errors.txt
index 5eeccfe729302..468ad400c26cc 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.errors.txt
+++ b/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES6.ts(6,5): error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES6.ts(6,5): error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
   Index signatures are incompatible.
-    Type '"" | 0' is not assignable to type 'boolean'.
-      Type '""' is not assignable to type 'boolean'.
+    Type 'string | number' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType9_ES6.ts (1 errors) ====
@@ -12,10 +12,10 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualTy
     
     var o: I = {
         ~
-!!! error TS2322: Type '{ [x: number]: "" | 0; }' is not assignable to type 'I'.
+!!! error TS2322: Type '{ [x: number]: string | number; }' is not assignable to type 'I'.
 !!! error TS2322:   Index signatures are incompatible.
-!!! error TS2322:     Type '"" | 0' is not assignable to type 'boolean'.
-!!! error TS2322:       Type '""' is not assignable to type 'boolean'.
+!!! error TS2322:     Type 'string | number' is not assignable to type 'boolean'.
+!!! error TS2322:       Type 'string' is not assignable to type 'boolean'.
         [+"foo"]: "",
         [+"bar"]: 0
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.types
index 6d5101eb6e4ce..eef180fbaea55 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType9_ES6.types
@@ -12,7 +12,7 @@ interface I {
 var o: I = {
 >o : I
 >I : I
->{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: "" | 0; }
+>{    [+"foo"]: "",    [+"bar"]: 0} : { [x: number]: string | number; }
 
     [+"foo"]: "",
 >+"foo" : number
diff --git a/tests/baselines/reference/concatError.types b/tests/baselines/reference/concatError.types
index 729704789074a..5228aaabe69a4 100644
--- a/tests/baselines/reference/concatError.types
+++ b/tests/baselines/reference/concatError.types
@@ -18,7 +18,7 @@ fa = fa.concat([0]);
 >fa.concat : { (...items: ReadonlyArray<number>[]): number[]; (...items: (number | ReadonlyArray<number>)[]): number[]; }
 >fa : number[]
 >concat : { (...items: ReadonlyArray<number>[]): number[]; (...items: (number | ReadonlyArray<number>)[]): number[]; }
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 
 fa = fa.concat(0);
diff --git a/tests/baselines/reference/concatTuples.types b/tests/baselines/reference/concatTuples.types
index 147d76efd0436..415979ad3b937 100644
--- a/tests/baselines/reference/concatTuples.types
+++ b/tests/baselines/reference/concatTuples.types
@@ -1,8 +1,8 @@
 === tests/cases/compiler/concatTuples.ts ===
 let ijs: [number, number][] = [[1, 2]];
 >ijs : [number, number][]
->[[1, 2]] : [number, number][]
->[1, 2] : [number, number]
+>[[1, 2]] : [1, 2][]
+>[1, 2] : [1, 2]
 >1 : 1
 >2 : 2
 
@@ -13,11 +13,11 @@ ijs = ijs.concat([[3, 4], [5, 6]]);
 >ijs.concat : { (...items: ReadonlyArray<[number, number]>[]): [number, number][]; (...items: ([number, number] | ReadonlyArray<[number, number]>)[]): [number, number][]; }
 >ijs : [number, number][]
 >concat : { (...items: ReadonlyArray<[number, number]>[]): [number, number][]; (...items: ([number, number] | ReadonlyArray<[number, number]>)[]): [number, number][]; }
->[[3, 4], [5, 6]] : [number, number][]
->[3, 4] : [number, number]
+>[[3, 4], [5, 6]] : ([3, 4] | [5, 6])[]
+>[3, 4] : [3, 4]
 >3 : 3
 >4 : 4
->[5, 6] : [number, number]
+>[5, 6] : [5, 6]
 >5 : 5
 >6 : 6
 
diff --git a/tests/baselines/reference/constructorWithAssignableReturnExpression.types b/tests/baselines/reference/constructorWithAssignableReturnExpression.types
index b542cdb2b7b66..53f62de037db7 100644
--- a/tests/baselines/reference/constructorWithAssignableReturnExpression.types
+++ b/tests/baselines/reference/constructorWithAssignableReturnExpression.types
@@ -30,7 +30,7 @@ class E {
 
     constructor() {
         return { x: 1 };
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
     }
diff --git a/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.types b/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.types
index d8217600a66e1..28867d921430c 100644
--- a/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.types
+++ b/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.types
@@ -580,7 +580,7 @@ module TypeScriptAllInOne {
 
             var a: number[] = [1, 2, 3, 4, 5, ];/*[] bug*/ // YES []
 >a : number[]
->[1, 2, 3, 4, 5, ] : number[]
+>[1, 2, 3, 4, 5, ] : (1 | 4 | 2 | 3 | 5)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/contextualTypeFromJSDoc.types b/tests/baselines/reference/contextualTypeFromJSDoc.types
index f1121935d382b..cf8bd9e887a22 100644
--- a/tests/baselines/reference/contextualTypeFromJSDoc.types
+++ b/tests/baselines/reference/contextualTypeFromJSDoc.types
@@ -2,19 +2,19 @@
 /** @type {Array<[string, {x?:number, y?:number}]>} */
 const arr = [
 >arr : [string, { x?: number; y?: number; }][]
->[    ['a', { x: 1 }],    ['b', { y: 2 }]] : ([string, { x: number; }] | [string, { y: number; }])[]
+>[    ['a', { x: 1 }],    ['b', { y: 2 }]] : (["a", { x: 1; }] | ["b", { y: 2; }])[]
 
     ['a', { x: 1 }],
->['a', { x: 1 }] : [string, { x: number; }]
+>['a', { x: 1 }] : ["a", { x: 1; }]
 >'a' : "a"
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
     ['b', { y: 2 }]
->['b', { y: 2 }] : [string, { y: number; }]
+>['b', { y: 2 }] : ["b", { y: 2; }]
 >'b' : "b"
->{ y: 2 } : { y: number; }
+>{ y: 2 } : { y: 2; }
 >y : number
 >2 : 2
 
@@ -25,19 +25,19 @@ function f() {
 >f : () => [string, { x?: number; y?: number; }][]
 
     return [
->[        ['a', { x: 1 }],        ['b', { y: 2 }]    ] : ([string, { x: number; }] | [string, { y: number; }])[]
+>[        ['a', { x: 1 }],        ['b', { y: 2 }]    ] : (["a", { x: 1; }] | ["b", { y: 2; }])[]
 
         ['a', { x: 1 }],
->['a', { x: 1 }] : [string, { x: number; }]
+>['a', { x: 1 }] : ["a", { x: 1; }]
 >'a' : "a"
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
         ['b', { y: 2 }]
->['b', { y: 2 }] : [string, { y: number; }]
+>['b', { y: 2 }] : ["b", { y: 2; }]
 >'b' : "b"
->{ y: 2 } : { y: number; }
+>{ y: 2 } : { y: 2; }
 >y : number
 >2 : 2
 
@@ -56,19 +56,19 @@ class C {
 >x : [string, { x?: number; y?: number; }][]
 
         return [
->[            ['a', { x: 1 }],            ['b', { y: 2 }]        ] : ([string, { x: number; }] | [string, { y: number; }])[]
+>[            ['a', { x: 1 }],            ['b', { y: 2 }]        ] : (["a", { x: 1; }] | ["b", { y: 2; }])[]
 
             ['a', { x: 1 }],
->['a', { x: 1 }] : [string, { x: number; }]
+>['a', { x: 1 }] : ["a", { x: 1; }]
 >'a' : "a"
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
             ['b', { y: 2 }]
->['b', { y: 2 }] : [string, { y: number; }]
+>['b', { y: 2 }] : ["b", { y: 2; }]
 >'b' : "b"
->{ y: 2 } : { y: number; }
+>{ y: 2 } : { y: 2; }
 >y : number
 >2 : 2
 
diff --git a/tests/baselines/reference/contextualTypeLogicalOr.types b/tests/baselines/reference/contextualTypeLogicalOr.types
index 7d380a2ace3f8..fdfb974d8bd3e 100644
--- a/tests/baselines/reference/contextualTypeLogicalOr.types
+++ b/tests/baselines/reference/contextualTypeLogicalOr.types
@@ -30,108 +30,108 @@ var a =
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4] ||
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 
     x && [1, 2, 3, 4];
->x && [1, 2, 3, 4] : number[]
+>x && [1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >x : number
->[1, 2, 3, 4] : number[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/contextualTypeShouldBeLiteral.js b/tests/baselines/reference/contextualTypeShouldBeLiteral.js
new file mode 100644
index 0000000000000..dcb9da993c1cb
--- /dev/null
+++ b/tests/baselines/reference/contextualTypeShouldBeLiteral.js
@@ -0,0 +1,136 @@
+//// [contextualTypeShouldBeLiteral.ts]
+interface X {
+    type: 'x';
+    value: string;
+    method(): void;
+}
+
+interface Y {
+    type: 'y';
+    value: 'none' | 'done';
+    method(): void;
+}
+
+function foo(bar: X | Y) { }
+
+foo({
+    type: 'y',
+    value: 'done',
+    method() {
+        this;
+        this.type;
+        this.value;
+    }
+});
+
+interface X2 {
+    type1: 'x';
+    value: string;
+    method(): void;
+}
+
+interface Y2 {
+    type2: 'y';
+    value: 'none' | 'done';
+    method(): void;
+}
+
+function foo2(bar: X2 | Y2) { }
+
+foo2({
+    type2: 'y',
+    value: 'done',
+    method() {
+        this;
+        this.value;
+    }
+});
+
+interface X3 {
+    type: 'x';
+    value: 1 | 2 | 3;
+    xtra: number;
+}
+
+interface Y3 {
+    type: 'y';
+    value: 11 | 12 | 13;
+    ytra: number;
+}
+
+let xy: X3 | Y3 = {
+    type: 'y',
+    value: 11,
+    ytra: 12
+};
+
+xy;
+
+
+interface LikeA {
+    x: 'x';
+    y: 'y';
+    value: string;
+    method(): void;
+}
+
+interface LikeB {
+    x: 'xx';
+    y: 'yy';
+    value: number;
+    method(): void;
+}
+
+let xyz: LikeA | LikeB = {
+    x: 'x',
+    y: 'y',
+    value: "foo",
+    method() {
+        this;
+        this.x;
+        this.y;
+        this.value;
+    }
+};
+
+xyz;
+
+//// [contextualTypeShouldBeLiteral.js]
+"use strict";
+function foo(bar) { }
+foo({
+    type: 'y',
+    value: 'done',
+    method: function () {
+        this;
+        this.type;
+        this.value;
+    }
+});
+function foo2(bar) { }
+foo2({
+    type2: 'y',
+    value: 'done',
+    method: function () {
+        this;
+        this.value;
+    }
+});
+var xy = {
+    type: 'y',
+    value: 11,
+    ytra: 12
+};
+xy;
+var xyz = {
+    x: 'x',
+    y: 'y',
+    value: "foo",
+    method: function () {
+        this;
+        this.x;
+        this.y;
+        this.value;
+    }
+};
+xyz;
diff --git a/tests/baselines/reference/contextualTypeShouldBeLiteral.symbols b/tests/baselines/reference/contextualTypeShouldBeLiteral.symbols
new file mode 100644
index 0000000000000..314117b509d94
--- /dev/null
+++ b/tests/baselines/reference/contextualTypeShouldBeLiteral.symbols
@@ -0,0 +1,229 @@
+=== tests/cases/compiler/contextualTypeShouldBeLiteral.ts ===
+interface X {
+>X : Symbol(X, Decl(contextualTypeShouldBeLiteral.ts, 0, 0))
+
+    type: 'x';
+>type : Symbol(X.type, Decl(contextualTypeShouldBeLiteral.ts, 0, 13))
+
+    value: string;
+>value : Symbol(X.value, Decl(contextualTypeShouldBeLiteral.ts, 1, 14))
+
+    method(): void;
+>method : Symbol(X.method, Decl(contextualTypeShouldBeLiteral.ts, 2, 18))
+}
+
+interface Y {
+>Y : Symbol(Y, Decl(contextualTypeShouldBeLiteral.ts, 4, 1))
+
+    type: 'y';
+>type : Symbol(Y.type, Decl(contextualTypeShouldBeLiteral.ts, 6, 13))
+
+    value: 'none' | 'done';
+>value : Symbol(Y.value, Decl(contextualTypeShouldBeLiteral.ts, 7, 14))
+
+    method(): void;
+>method : Symbol(Y.method, Decl(contextualTypeShouldBeLiteral.ts, 8, 27))
+}
+
+function foo(bar: X | Y) { }
+>foo : Symbol(foo, Decl(contextualTypeShouldBeLiteral.ts, 10, 1))
+>bar : Symbol(bar, Decl(contextualTypeShouldBeLiteral.ts, 12, 13))
+>X : Symbol(X, Decl(contextualTypeShouldBeLiteral.ts, 0, 0))
+>Y : Symbol(Y, Decl(contextualTypeShouldBeLiteral.ts, 4, 1))
+
+foo({
+>foo : Symbol(foo, Decl(contextualTypeShouldBeLiteral.ts, 10, 1))
+
+    type: 'y',
+>type : Symbol(type, Decl(contextualTypeShouldBeLiteral.ts, 14, 5))
+
+    value: 'done',
+>value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 15, 14))
+
+    method() {
+>method : Symbol(method, Decl(contextualTypeShouldBeLiteral.ts, 16, 18))
+
+        this;
+>this : Symbol(Y, Decl(contextualTypeShouldBeLiteral.ts, 4, 1))
+
+        this.type;
+>this.type : Symbol(Y.type, Decl(contextualTypeShouldBeLiteral.ts, 6, 13))
+>this : Symbol(Y, Decl(contextualTypeShouldBeLiteral.ts, 4, 1))
+>type : Symbol(Y.type, Decl(contextualTypeShouldBeLiteral.ts, 6, 13))
+
+        this.value;
+>this.value : Symbol(Y.value, Decl(contextualTypeShouldBeLiteral.ts, 7, 14))
+>this : Symbol(Y, Decl(contextualTypeShouldBeLiteral.ts, 4, 1))
+>value : Symbol(Y.value, Decl(contextualTypeShouldBeLiteral.ts, 7, 14))
+    }
+});
+
+interface X2 {
+>X2 : Symbol(X2, Decl(contextualTypeShouldBeLiteral.ts, 22, 3))
+
+    type1: 'x';
+>type1 : Symbol(X2.type1, Decl(contextualTypeShouldBeLiteral.ts, 24, 14))
+
+    value: string;
+>value : Symbol(X2.value, Decl(contextualTypeShouldBeLiteral.ts, 25, 15))
+
+    method(): void;
+>method : Symbol(X2.method, Decl(contextualTypeShouldBeLiteral.ts, 26, 18))
+}
+
+interface Y2 {
+>Y2 : Symbol(Y2, Decl(contextualTypeShouldBeLiteral.ts, 28, 1))
+
+    type2: 'y';
+>type2 : Symbol(Y2.type2, Decl(contextualTypeShouldBeLiteral.ts, 30, 14))
+
+    value: 'none' | 'done';
+>value : Symbol(Y2.value, Decl(contextualTypeShouldBeLiteral.ts, 31, 15))
+
+    method(): void;
+>method : Symbol(Y2.method, Decl(contextualTypeShouldBeLiteral.ts, 32, 27))
+}
+
+function foo2(bar: X2 | Y2) { }
+>foo2 : Symbol(foo2, Decl(contextualTypeShouldBeLiteral.ts, 34, 1))
+>bar : Symbol(bar, Decl(contextualTypeShouldBeLiteral.ts, 36, 14))
+>X2 : Symbol(X2, Decl(contextualTypeShouldBeLiteral.ts, 22, 3))
+>Y2 : Symbol(Y2, Decl(contextualTypeShouldBeLiteral.ts, 28, 1))
+
+foo2({
+>foo2 : Symbol(foo2, Decl(contextualTypeShouldBeLiteral.ts, 34, 1))
+
+    type2: 'y',
+>type2 : Symbol(type2, Decl(contextualTypeShouldBeLiteral.ts, 38, 6))
+
+    value: 'done',
+>value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 39, 15))
+
+    method() {
+>method : Symbol(method, Decl(contextualTypeShouldBeLiteral.ts, 40, 18))
+
+        this;
+        this.value;
+>this.value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 25, 15), Decl(contextualTypeShouldBeLiteral.ts, 31, 15))
+>value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 25, 15), Decl(contextualTypeShouldBeLiteral.ts, 31, 15))
+    }
+});
+
+interface X3 {
+>X3 : Symbol(X3, Decl(contextualTypeShouldBeLiteral.ts, 45, 3))
+
+    type: 'x';
+>type : Symbol(X3.type, Decl(contextualTypeShouldBeLiteral.ts, 47, 14))
+
+    value: 1 | 2 | 3;
+>value : Symbol(X3.value, Decl(contextualTypeShouldBeLiteral.ts, 48, 14))
+
+    xtra: number;
+>xtra : Symbol(X3.xtra, Decl(contextualTypeShouldBeLiteral.ts, 49, 21))
+}
+
+interface Y3 {
+>Y3 : Symbol(Y3, Decl(contextualTypeShouldBeLiteral.ts, 51, 1))
+
+    type: 'y';
+>type : Symbol(Y3.type, Decl(contextualTypeShouldBeLiteral.ts, 53, 14))
+
+    value: 11 | 12 | 13;
+>value : Symbol(Y3.value, Decl(contextualTypeShouldBeLiteral.ts, 54, 14))
+
+    ytra: number;
+>ytra : Symbol(Y3.ytra, Decl(contextualTypeShouldBeLiteral.ts, 55, 24))
+}
+
+let xy: X3 | Y3 = {
+>xy : Symbol(xy, Decl(contextualTypeShouldBeLiteral.ts, 59, 3))
+>X3 : Symbol(X3, Decl(contextualTypeShouldBeLiteral.ts, 45, 3))
+>Y3 : Symbol(Y3, Decl(contextualTypeShouldBeLiteral.ts, 51, 1))
+
+    type: 'y',
+>type : Symbol(type, Decl(contextualTypeShouldBeLiteral.ts, 59, 19))
+
+    value: 11,
+>value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 60, 14))
+
+    ytra: 12
+>ytra : Symbol(ytra, Decl(contextualTypeShouldBeLiteral.ts, 61, 14))
+
+};
+
+xy;
+>xy : Symbol(xy, Decl(contextualTypeShouldBeLiteral.ts, 59, 3))
+
+
+interface LikeA {
+>LikeA : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+
+    x: 'x';
+>x : Symbol(LikeA.x, Decl(contextualTypeShouldBeLiteral.ts, 68, 17))
+
+    y: 'y';
+>y : Symbol(LikeA.y, Decl(contextualTypeShouldBeLiteral.ts, 69, 11))
+
+    value: string;
+>value : Symbol(LikeA.value, Decl(contextualTypeShouldBeLiteral.ts, 70, 11))
+
+    method(): void;
+>method : Symbol(LikeA.method, Decl(contextualTypeShouldBeLiteral.ts, 71, 18))
+}
+
+interface LikeB {
+>LikeB : Symbol(LikeB, Decl(contextualTypeShouldBeLiteral.ts, 73, 1))
+
+    x: 'xx';
+>x : Symbol(LikeB.x, Decl(contextualTypeShouldBeLiteral.ts, 75, 17))
+
+    y: 'yy';
+>y : Symbol(LikeB.y, Decl(contextualTypeShouldBeLiteral.ts, 76, 12))
+
+    value: number;
+>value : Symbol(LikeB.value, Decl(contextualTypeShouldBeLiteral.ts, 77, 12))
+
+    method(): void;
+>method : Symbol(LikeB.method, Decl(contextualTypeShouldBeLiteral.ts, 78, 18))
+}
+
+let xyz: LikeA | LikeB = {
+>xyz : Symbol(xyz, Decl(contextualTypeShouldBeLiteral.ts, 82, 3))
+>LikeA : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+>LikeB : Symbol(LikeB, Decl(contextualTypeShouldBeLiteral.ts, 73, 1))
+
+    x: 'x',
+>x : Symbol(x, Decl(contextualTypeShouldBeLiteral.ts, 82, 26))
+
+    y: 'y',
+>y : Symbol(y, Decl(contextualTypeShouldBeLiteral.ts, 83, 11))
+
+    value: "foo",
+>value : Symbol(value, Decl(contextualTypeShouldBeLiteral.ts, 84, 11))
+
+    method() {
+>method : Symbol(method, Decl(contextualTypeShouldBeLiteral.ts, 85, 17))
+
+        this;
+>this : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+
+        this.x;
+>this.x : Symbol(LikeA.x, Decl(contextualTypeShouldBeLiteral.ts, 68, 17))
+>this : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+>x : Symbol(LikeA.x, Decl(contextualTypeShouldBeLiteral.ts, 68, 17))
+
+        this.y;
+>this.y : Symbol(LikeA.y, Decl(contextualTypeShouldBeLiteral.ts, 69, 11))
+>this : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+>y : Symbol(LikeA.y, Decl(contextualTypeShouldBeLiteral.ts, 69, 11))
+
+        this.value;
+>this.value : Symbol(LikeA.value, Decl(contextualTypeShouldBeLiteral.ts, 70, 11))
+>this : Symbol(LikeA, Decl(contextualTypeShouldBeLiteral.ts, 65, 3))
+>value : Symbol(LikeA.value, Decl(contextualTypeShouldBeLiteral.ts, 70, 11))
+    }
+};
+
+xyz;
+>xyz : Symbol(xyz, Decl(contextualTypeShouldBeLiteral.ts, 82, 3))
+
diff --git a/tests/baselines/reference/contextualTypeShouldBeLiteral.types b/tests/baselines/reference/contextualTypeShouldBeLiteral.types
new file mode 100644
index 0000000000000..20c3e2d3ea404
--- /dev/null
+++ b/tests/baselines/reference/contextualTypeShouldBeLiteral.types
@@ -0,0 +1,248 @@
+=== tests/cases/compiler/contextualTypeShouldBeLiteral.ts ===
+interface X {
+>X : X
+
+    type: 'x';
+>type : "x"
+
+    value: string;
+>value : string
+
+    method(): void;
+>method : () => void
+}
+
+interface Y {
+>Y : Y
+
+    type: 'y';
+>type : "y"
+
+    value: 'none' | 'done';
+>value : "none" | "done"
+
+    method(): void;
+>method : () => void
+}
+
+function foo(bar: X | Y) { }
+>foo : (bar: X | Y) => void
+>bar : X | Y
+>X : X
+>Y : Y
+
+foo({
+>foo({    type: 'y',    value: 'done',    method() {        this;        this.type;        this.value;    }}) : void
+>foo : (bar: X | Y) => void
+>{    type: 'y',    value: 'done',    method() {        this;        this.type;        this.value;    }} : { type: "y"; value: "done"; method(): void; }
+
+    type: 'y',
+>type : string
+>'y' : "y"
+
+    value: 'done',
+>value : string
+>'done' : "done"
+
+    method() {
+>method : () => void
+
+        this;
+>this : Y
+
+        this.type;
+>this.type : "y"
+>this : Y
+>type : "y"
+
+        this.value;
+>this.value : "none" | "done"
+>this : Y
+>value : "none" | "done"
+    }
+});
+
+interface X2 {
+>X2 : X2
+
+    type1: 'x';
+>type1 : "x"
+
+    value: string;
+>value : string
+
+    method(): void;
+>method : () => void
+}
+
+interface Y2 {
+>Y2 : Y2
+
+    type2: 'y';
+>type2 : "y"
+
+    value: 'none' | 'done';
+>value : "none" | "done"
+
+    method(): void;
+>method : () => void
+}
+
+function foo2(bar: X2 | Y2) { }
+>foo2 : (bar: X2 | Y2) => void
+>bar : X2 | Y2
+>X2 : X2
+>Y2 : Y2
+
+foo2({
+>foo2({    type2: 'y',    value: 'done',    method() {        this;        this.value;    }}) : void
+>foo2 : (bar: X2 | Y2) => void
+>{    type2: 'y',    value: 'done',    method() {        this;        this.value;    }} : { type2: "y"; value: "done"; method(): void; }
+
+    type2: 'y',
+>type2 : string
+>'y' : "y"
+
+    value: 'done',
+>value : string
+>'done' : "done"
+
+    method() {
+>method : () => void
+
+        this;
+>this : X2 | Y2
+
+        this.value;
+>this.value : string
+>this : X2 | Y2
+>value : string
+    }
+});
+
+interface X3 {
+>X3 : X3
+
+    type: 'x';
+>type : "x"
+
+    value: 1 | 2 | 3;
+>value : 1 | 2 | 3
+
+    xtra: number;
+>xtra : number
+}
+
+interface Y3 {
+>Y3 : Y3
+
+    type: 'y';
+>type : "y"
+
+    value: 11 | 12 | 13;
+>value : 11 | 12 | 13
+
+    ytra: number;
+>ytra : number
+}
+
+let xy: X3 | Y3 = {
+>xy : X3 | Y3
+>X3 : X3
+>Y3 : Y3
+>{    type: 'y',    value: 11,    ytra: 12} : { type: "y"; value: 11; ytra: 12; }
+
+    type: 'y',
+>type : string
+>'y' : "y"
+
+    value: 11,
+>value : number
+>11 : 11
+
+    ytra: 12
+>ytra : number
+>12 : 12
+
+};
+
+xy;
+>xy : Y3
+
+
+interface LikeA {
+>LikeA : LikeA
+
+    x: 'x';
+>x : "x"
+
+    y: 'y';
+>y : "y"
+
+    value: string;
+>value : string
+
+    method(): void;
+>method : () => void
+}
+
+interface LikeB {
+>LikeB : LikeB
+
+    x: 'xx';
+>x : "xx"
+
+    y: 'yy';
+>y : "yy"
+
+    value: number;
+>value : number
+
+    method(): void;
+>method : () => void
+}
+
+let xyz: LikeA | LikeB = {
+>xyz : LikeA | LikeB
+>LikeA : LikeA
+>LikeB : LikeB
+>{    x: 'x',    y: 'y',    value: "foo",    method() {        this;        this.x;        this.y;        this.value;    }} : { x: "x"; y: "y"; value: "foo"; method(): void; }
+
+    x: 'x',
+>x : string
+>'x' : "x"
+
+    y: 'y',
+>y : string
+>'y' : "y"
+
+    value: "foo",
+>value : string
+>"foo" : "foo"
+
+    method() {
+>method : () => void
+
+        this;
+>this : LikeA
+
+        this.x;
+>this.x : "x"
+>this : LikeA
+>x : "x"
+
+        this.y;
+>this.y : "y"
+>this : LikeA
+>y : "y"
+
+        this.value;
+>this.value : string
+>this : LikeA
+>value : string
+    }
+};
+
+xyz;
+>xyz : LikeA
+
diff --git a/tests/baselines/reference/contextualTypeWithTuple.errors.txt b/tests/baselines/reference/contextualTypeWithTuple.errors.txt
index 58a90919c5b29..516a8c0684939 100644
--- a/tests/baselines/reference/contextualTypeWithTuple.errors.txt
+++ b/tests/baselines/reference/contextualTypeWithTuple.errors.txt
@@ -1,13 +1,15 @@
-tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(3,5): error TS2322: Type '[number, string, boolean]' is not assignable to type '[number, string]'.
+tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(3,5): error TS2322: Type '[5, "foo", boolean]' is not assignable to type '[number, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(15,1): error TS2322: Type '[number, string, boolean]' is not assignable to type '[number, string]'.
-tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(18,1): error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]'.
+  Types of property 'length' are incompatible.
+    Type '3' is not assignable to type '2'.
+tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(18,1): error TS2322: Type '[{}, 5]' is not assignable to type '[{ a: string; }, number]'.
   Type '{}' is not assignable to type '{ a: string; }'.
     Property 'a' is missing in type '{}'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(19,1): error TS2322: Type '[number, string]' is not assignable to type '[number, string, boolean]'.
   Property '2' is missing in type '[number, string]'.
-tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(20,5): error TS2322: Type '[string, string, number]' is not assignable to type '[string, string]'.
+tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(20,5): error TS2322: Type '["foo", "bar", number]' is not assignable to type '[string, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
 tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(23,1): error TS2322: Type '[C, string | number, D]' is not assignable to type '[C, string | number]'.
@@ -25,7 +27,7 @@ tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(25,1): error TS23
     var numStrTuple: [number, string] = [5, "hello"];
     var numStrTuple2: [number, string] = [5, "foo", true];
         ~~~~~~~~~~~~
-!!! error TS2322: Type '[number, string, boolean]' is not assignable to type '[number, string]'.
+!!! error TS2322: Type '[5, "foo", boolean]' is not assignable to type '[number, string]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '3' is not assignable to type '2'.
     var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
@@ -42,11 +44,13 @@ tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(25,1): error TS23
     numStrTuple = numStrBoolTuple;
     ~~~~~~~~~~~
 !!! error TS2322: Type '[number, string, boolean]' is not assignable to type '[number, string]'.
+!!! error TS2322:   Types of property 'length' are incompatible.
+!!! error TS2322:     Type '3' is not assignable to type '2'.
     
     // error
     objNumTuple = [ {}, 5];
     ~~~~~~~~~~~
-!!! error TS2322: Type '[{}, number]' is not assignable to type '[{ a: string; }, number]'.
+!!! error TS2322: Type '[{}, 5]' is not assignable to type '[{ a: string; }, number]'.
 !!! error TS2322:   Type '{}' is not assignable to type '{ a: string; }'.
 !!! error TS2322:     Property 'a' is missing in type '{}'.
     numStrBoolTuple = numStrTuple;
@@ -55,7 +59,7 @@ tests/cases/conformance/types/tuple/contextualTypeWithTuple.ts(25,1): error TS23
 !!! error TS2322:   Property '2' is missing in type '[number, string]'.
     var strStrTuple: [string, string] = ["foo", "bar", 5];
         ~~~~~~~~~~~
-!!! error TS2322: Type '[string, string, number]' is not assignable to type '[string, string]'.
+!!! error TS2322: Type '["foo", "bar", number]' is not assignable to type '[string, string]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '3' is not assignable to type '2'.
     
diff --git a/tests/baselines/reference/contextualTypeWithTuple.types b/tests/baselines/reference/contextualTypeWithTuple.types
index ddc683739c8b5..0e9f70a83b5e8 100644
--- a/tests/baselines/reference/contextualTypeWithTuple.types
+++ b/tests/baselines/reference/contextualTypeWithTuple.types
@@ -2,20 +2,20 @@
 // no error
 var numStrTuple: [number, string] = [5, "hello"];
 >numStrTuple : [number, string]
->[5, "hello"] : [number, string]
+>[5, "hello"] : [5, "hello"]
 >5 : 5
 >"hello" : "hello"
 
 var numStrTuple2: [number, string] = [5, "foo", true];
 >numStrTuple2 : [number, string]
->[5, "foo", true] : [number, string, boolean]
+>[5, "foo", true] : [5, "foo", boolean]
 >5 : 5
 >"foo" : "foo"
 >true : true
 
 var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
 >numStrBoolTuple : [number, string, boolean]
->[5, "foo", true] : [number, string, true]
+>[5, "foo", true] : [5, "foo", true]
 >5 : 5
 >"foo" : "foo"
 >true : true
@@ -23,17 +23,17 @@ var numStrBoolTuple: [number, string, boolean] = [5, "foo", true];
 var objNumTuple: [{ a: string }, number] = [{ a: "world" }, 5];
 >objNumTuple : [{ a: string; }, number]
 >a : string
->[{ a: "world" }, 5] : [{ a: string; }, number]
->{ a: "world" } : { a: string; }
+>[{ a: "world" }, 5] : [{ a: "world"; }, 5]
+>{ a: "world" } : { a: "world"; }
 >a : string
 >"world" : "world"
 >5 : 5
 
 var strTupleTuple: [string, [number, {}]] = ["bar", [5, { x: 1, y: 1 }]];
 >strTupleTuple : [string, [number, {}]]
->["bar", [5, { x: 1, y: 1 }]] : [string, [number, { x: number; y: number; }]]
+>["bar", [5, { x: 1, y: 1 }]] : ["bar", [5, { x: number; y: number; }]]
 >"bar" : "bar"
->[5, { x: 1, y: 1 }] : [number, { x: number; y: number; }]
+>[5, { x: 1, y: 1 }] : [5, { x: number; y: number; }]
 >5 : 5
 >{ x: 1, y: 1 } : { x: number; y: number; }
 >x : number
@@ -50,7 +50,7 @@ class D { }
 var unionTuple: [C, string | number] = [new C(), "foo"];
 >unionTuple : [C, string | number]
 >C : C
->[new C(), "foo"] : [C, string]
+>[new C(), "foo"] : [C, "foo"]
 >new C() : C
 >C : typeof C
 >"foo" : "foo"
@@ -58,7 +58,7 @@ var unionTuple: [C, string | number] = [new C(), "foo"];
 var unionTuple1: [C, string | number] = [new C(), "foo"];
 >unionTuple1 : [C, string | number]
 >C : C
->[new C(), "foo"] : [C, string]
+>[new C(), "foo"] : [C, "foo"]
 >new C() : C
 >C : typeof C
 >"foo" : "foo"
@@ -67,7 +67,7 @@ var unionTuple2: [C, string | number, D] = [new C(), "foo", new D()];
 >unionTuple2 : [C, string | number, D]
 >C : C
 >D : D
->[new C(), "foo", new D()] : [C, string, D]
+>[new C(), "foo", new D()] : [C, "foo", D]
 >new C() : C
 >C : typeof C
 >"foo" : "foo"
@@ -76,7 +76,7 @@ var unionTuple2: [C, string | number, D] = [new C(), "foo", new D()];
 
 var unionTuple3: [number, string| number] = [10, "foo"]; 
 >unionTuple3 : [number, string | number]
->[10, "foo"] : [number, string]
+>[10, "foo"] : [10, "foo"]
 >10 : 10
 >"foo" : "foo"
 
@@ -92,9 +92,9 @@ numStrTuple = numStrBoolTuple;
 
 // error
 objNumTuple = [ {}, 5];
->objNumTuple = [ {}, 5] : [{}, number]
+>objNumTuple = [ {}, 5] : [{}, 5]
 >objNumTuple : [{ a: string; }, number]
->[ {}, 5] : [{}, number]
+>[ {}, 5] : [{}, 5]
 >{} : {}
 >5 : 5
 
@@ -105,7 +105,7 @@ numStrBoolTuple = numStrTuple;
 
 var strStrTuple: [string, string] = ["foo", "bar", 5];
 >strStrTuple : [string, string]
->["foo", "bar", 5] : [string, string, number]
+>["foo", "bar", 5] : ["foo", "bar", number]
 >"foo" : "foo"
 >"bar" : "bar"
 >5 : 5
diff --git a/tests/baselines/reference/contextualTypeWithUnionTypeIndexSignatures.types b/tests/baselines/reference/contextualTypeWithUnionTypeIndexSignatures.types
index 97c5f0fdf9035..8b6aa4cc84dac 100644
--- a/tests/baselines/reference/contextualTypeWithUnionTypeIndexSignatures.types
+++ b/tests/baselines/reference/contextualTypeWithUnionTypeIndexSignatures.types
@@ -89,7 +89,7 @@ var x: IWithNoStringIndexSignature | IWithStringIndexSignature1 = { foo: "hello"
 >x : IWithNoStringIndexSignature | IWithStringIndexSignature1
 >IWithNoStringIndexSignature : IWithNoStringIndexSignature
 >IWithStringIndexSignature1 : IWithStringIndexSignature1
->{ foo: "hello" } : { foo: string; }
+>{ foo: "hello" } : { foo: "hello"; }
 >foo : string
 >"hello" : "hello"
 
@@ -142,7 +142,7 @@ var x3: IWithNoNumberIndexSignature | IWithNumberIndexSignature1 = { 0: "hello"
 >x3 : IWithNoNumberIndexSignature | IWithNumberIndexSignature1
 >IWithNoNumberIndexSignature : IWithNoNumberIndexSignature
 >IWithNumberIndexSignature1 : IWithNumberIndexSignature1
->{ 0: "hello" } : { 0: string; }
+>{ 0: "hello" } : { 0: "hello"; }
 >"hello" : "hello"
 
 var x4: IWithNumberIndexSignature1 | IWithNumberIndexSignature2 = { 1: a => a.toString() }; // a should be number
diff --git a/tests/baselines/reference/contextualTypeWithUnionTypeMembers.types b/tests/baselines/reference/contextualTypeWithUnionTypeMembers.types
index 3d13b94bc5942..ec4f239e4d3c6 100644
--- a/tests/baselines/reference/contextualTypeWithUnionTypeMembers.types
+++ b/tests/baselines/reference/contextualTypeWithUnionTypeMembers.types
@@ -76,7 +76,7 @@ var i1Ori2: I1<number> | I2<number> = { // Like i1
 >i1Ori2 : I1<number> | I2<number>
 >I1 : I1<T>
 >I2 : I2<T>
->{ // Like i1    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI1: a => a,    propertyOnlyInI1: "Hello",} : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: string; }
+>{ // Like i1    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI1: a => a,    propertyOnlyInI1: "Hello",} : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: "Hello"; }
 
     commonPropertyType: "hello",
 >commonPropertyType : string
@@ -109,7 +109,7 @@ var i1Ori2: I1<number> | I2<number> = { // Like i2
 >i1Ori2 : I1<number> | I2<number>
 >I1 : I1<T>
 >I2 : I2<T>
->{ // Like i2    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI2: a => a,    propertyOnlyInI2: "Hello",} : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: string; }
+>{ // Like i2    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI2: a => a,    propertyOnlyInI2: "Hello",} : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: "Hello"; }
 
     commonPropertyType: "hello",
 >commonPropertyType : string
@@ -142,7 +142,7 @@ var i1Ori2: I1<number> | I2<number> = { // Like i1 and i2 both
 >i1Ori2 : I1<number> | I2<number>
 >I1 : I1<T>
 >I2 : I2<T>
->{ // Like i1 and i2 both    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI1: a => a,    propertyOnlyInI1: "Hello",    methodOnlyInI2: a => a,    propertyOnlyInI2: "Hello",} : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: string; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: string; }
+>{ // Like i1 and i2 both    commonPropertyType: "hello",    commonMethodType: a=> a,    commonMethodWithTypeParameter: a => a,    methodOnlyInI1: a => a,    propertyOnlyInI1: "Hello",    methodOnlyInI2: a => a,    propertyOnlyInI2: "Hello",} : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: "Hello"; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: "Hello"; }
 
     commonPropertyType: "hello",
 >commonPropertyType : string
@@ -187,10 +187,10 @@ var arrayI1OrI2: Array<I1<number> | I2<number>> = [i1, i2, { // Like i1
 >Array : T[]
 >I1 : I1<T>
 >I2 : I2<T>
->[i1, i2, { // Like i1        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",    },    { // Like i2        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    }, { // Like i1 and i2 both        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    }] : (I1<number> | I2<number> | { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: string; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: string; })[]
+>[i1, i2, { // Like i1        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",    },    { // Like i2        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    }, { // Like i1 and i2 both        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    }] : (I1<number> | I2<number> | { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: "Hello"; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: "Hello"; })[]
 >i1 : I1<number>
 >i2 : I2<number>
->{ // Like i1        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",    } : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: string; }
+>{ // Like i1        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",    } : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: "Hello"; }
 
         commonPropertyType: "hello",
 >commonPropertyType : string
@@ -220,7 +220,7 @@ var arrayI1OrI2: Array<I1<number> | I2<number>> = [i1, i2, { // Like i1
 
     },
     { // Like i2
->{ // Like i2        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    } : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: string; }
+>{ // Like i2        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    } : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: "Hello"; }
 
         commonPropertyType: "hello",
 >commonPropertyType : string
@@ -249,7 +249,7 @@ var arrayI1OrI2: Array<I1<number> | I2<number>> = [i1, i2, { // Like i1
 >"Hello" : "Hello"
 
     }, { // Like i1 and i2 both
->{ // Like i1 and i2 both        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    } : { commonPropertyType: string; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: string; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: string; }
+>{ // Like i1 and i2 both        commonPropertyType: "hello",        commonMethodType: a=> a,        commonMethodWithTypeParameter: a => a,        methodOnlyInI1: a => a,        propertyOnlyInI1: "Hello",        methodOnlyInI2: a => a,        propertyOnlyInI2: "Hello",    } : { commonPropertyType: "hello"; commonMethodType: (a: string) => string; commonMethodWithTypeParameter: (a: number) => number; methodOnlyInI1: (a: string) => string; propertyOnlyInI1: "Hello"; methodOnlyInI2: (a: string) => string; propertyOnlyInI2: "Hello"; }
 
         commonPropertyType: "hello",
 >commonPropertyType : string
@@ -335,7 +335,7 @@ var i11Ori21: I11 | I21 = {
 >i11Ori21 : I11 | I21
 >I11 : I11
 >I21 : I21
->{     // Like i1    commonMethodDifferentReturnType: (a, b) => {        var z = a.charAt(b);        return z;      },    commonPropertyDifferentType: "hello",  } : { commonMethodDifferentReturnType: (a: string, b: number) => string; commonPropertyDifferentType: string; }
+>{     // Like i1    commonMethodDifferentReturnType: (a, b) => {        var z = a.charAt(b);        return z;      },    commonPropertyDifferentType: "hello",  } : { commonMethodDifferentReturnType: (a: string, b: number) => string; commonPropertyDifferentType: "hello"; }
 
     // Like i1
     commonMethodDifferentReturnType: (a, b) => {
@@ -365,7 +365,7 @@ var i11Ori21: I11 | I21 = {
 >i11Ori21 : I11 | I21
 >I11 : I11
 >I21 : I21
->{     // Like i2    commonMethodDifferentReturnType: (a, b) => {        var z = a.charCodeAt(b);        return z;    },    commonPropertyDifferentType: 10,} : { commonMethodDifferentReturnType: (a: string, b: number) => number; commonPropertyDifferentType: number; }
+>{     // Like i2    commonMethodDifferentReturnType: (a, b) => {        var z = a.charCodeAt(b);        return z;    },    commonPropertyDifferentType: 10,} : { commonMethodDifferentReturnType: (a: string, b: number) => number; commonPropertyDifferentType: 10; }
 
     // Like i2
     commonMethodDifferentReturnType: (a, b) => {
@@ -402,7 +402,7 @@ var arrayOrI11OrI21: Array<I11 | I21> = [i11, i21, i11 || i21, {
 >i11 || i21 : I11 | I21
 >i11 : I11
 >i21 : I21
->{         // Like i1        commonMethodDifferentReturnType: (a, b) => {            var z = a.charAt(b);            return z;        },        commonPropertyDifferentType: "hello",    } : { commonMethodDifferentReturnType: (a: string, b: number) => string; commonPropertyDifferentType: string; }
+>{         // Like i1        commonMethodDifferentReturnType: (a, b) => {            var z = a.charAt(b);            return z;        },        commonPropertyDifferentType: "hello",    } : { commonMethodDifferentReturnType: (a: string, b: number) => string; commonPropertyDifferentType: "hello"; }
 
         // Like i1
         commonMethodDifferentReturnType: (a, b) => {
@@ -428,7 +428,7 @@ var arrayOrI11OrI21: Array<I11 | I21> = [i11, i21, i11 || i21, {
 >"hello" : "hello"
 
     }, { 
->{         // Like i2        commonMethodDifferentReturnType: (a, b) => {            var z = a.charCodeAt(b);            return z;        },        commonPropertyDifferentType: 10,    } : { commonMethodDifferentReturnType: (a: string, b: number) => number; commonPropertyDifferentType: number; }
+>{         // Like i2        commonMethodDifferentReturnType: (a, b) => {            var z = a.charCodeAt(b);            return z;        },        commonPropertyDifferentType: 10,    } : { commonMethodDifferentReturnType: (a: string, b: number) => number; commonPropertyDifferentType: 10; }
 
         // Like i2
         commonMethodDifferentReturnType: (a, b) => {
diff --git a/tests/baselines/reference/contextualTyping.types b/tests/baselines/reference/contextualTyping.types
index c2379425e1e4f..83b1704464d45 100644
--- a/tests/baselines/reference/contextualTyping.types
+++ b/tests/baselines/reference/contextualTyping.types
@@ -71,8 +71,8 @@ var c3t2 = <IFoo>({
 >c3t2 : IFoo
 ><IFoo>({    n: 1}) : IFoo
 >IFoo : IFoo
->({    n: 1}) : { n: number; }
->{    n: 1} : { n: number; }
+>({    n: 1}) : { n: 1; }
+>{    n: 1} : { n: 1; }
 
     n: 1
 >n : number
@@ -284,8 +284,8 @@ c7t2[0] = <IFoo>({n: 1});
 >0 : 0
 ><IFoo>({n: 1}) : IFoo
 >IFoo : IFoo
->({n: 1}) : { n: number; }
->{n: 1} : { n: number; }
+>({n: 1}) : { n: 1; }
+>{n: 1} : { n: 1; }
 >n : number
 >1 : 1
 
@@ -448,8 +448,8 @@ objc8.t2 = <IFoo>({
 >t2 : IFoo
 ><IFoo>({    n: 1}) : IFoo
 >IFoo : IFoo
->({    n: 1}) : { n: number; }
->{    n: 1} : { n: number; }
+>({    n: 1}) : { n: 1; }
+>{    n: 1} : { n: 1; }
 
     n: 1
 >n : number
@@ -665,8 +665,8 @@ var c12t2 = <IFoo> ({
 >c12t2 : IFoo
 ><IFoo> ({    n: 1}) : IFoo
 >IFoo : IFoo
->({    n: 1}) : { n: number; }
->{    n: 1} : { n: number; }
+>({    n: 1}) : { n: 1; }
+>{    n: 1} : { n: 1; }
 
     n: 1
 >n : number
@@ -921,11 +921,11 @@ Point.prototype.add = function(dx, dy) {
 };
 
 Point.prototype = {
->Point.prototype = {    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: number; y: number; add: (dx: number, dy: number) => Point; }
+>Point.prototype = {    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: 0; y: 0; add: (dx: number, dy: number) => Point; }
 >Point.prototype : Point
 >Point : typeof Point
 >prototype : Point
->{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: number; y: number; add: (dx: number, dy: number) => Point; }
+>{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: 0; y: 0; add: (dx: number, dy: number) => Point; }
 
     x: 0,
 >x : number
diff --git a/tests/baselines/reference/contextualTyping1.types b/tests/baselines/reference/contextualTyping1.types
index 1f300311e944a..481786980707c 100644
--- a/tests/baselines/reference/contextualTyping1.types
+++ b/tests/baselines/reference/contextualTyping1.types
@@ -2,7 +2,7 @@
 var foo: {id:number;} = {id:4};
 >foo : { id: number; }
 >id : number
->{id:4} : { id: number; }
+>{id:4} : { id: 4; }
 >id : number
 >4 : 4
 
diff --git a/tests/baselines/reference/contextualTyping10.types b/tests/baselines/reference/contextualTyping10.types
index 6379d6f82aa13..50a66de7c1aad 100644
--- a/tests/baselines/reference/contextualTyping10.types
+++ b/tests/baselines/reference/contextualTyping10.types
@@ -3,11 +3,11 @@ class foo { public bar:{id:number;}[] = [{id:1}, {id:2}]; }
 >foo : foo
 >bar : { id: number; }[]
 >id : number
->[{id:1}, {id:2}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2}] : ({ id: 1; } | { id: 2; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2} : { id: number; }
+>{id:2} : { id: 2; }
 >id : number
 >2 : 2
 
diff --git a/tests/baselines/reference/contextualTyping12.errors.txt b/tests/baselines/reference/contextualTyping12.errors.txt
index 22ed6ad931e3b..7c082ae5e899c 100644
--- a/tests/baselines/reference/contextualTyping12.errors.txt
+++ b/tests/baselines/reference/contextualTyping12.errors.txt
@@ -1,13 +1,13 @@
-tests/cases/compiler/contextualTyping12.ts(1,57): error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-  Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-    Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping12.ts(1,57): error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+  Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+    Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping12.ts (1 errors) ====
     class foo { public bar:{id:number;}[] = [{id:1}, {id:2, name:"foo"}]; }
                                                             ~~~~~~~~~~
-!!! error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-!!! error TS2322:   Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-!!! error TS2322:     Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+!!! error TS2322:   Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322:     Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping12.types b/tests/baselines/reference/contextualTyping12.types
index d4da0d519eae2..b45b8a41d8109 100644
--- a/tests/baselines/reference/contextualTyping12.types
+++ b/tests/baselines/reference/contextualTyping12.types
@@ -3,11 +3,11 @@ class foo { public bar:{id:number;}[] = [{id:1}, {id:2, name:"foo"}]; }
 >foo : foo
 >bar : { id: number; }[]
 >id : number
->[{id:1}, {id:2, name:"foo"}] : ({ id: number; } | { id: number; name: string; })[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2, name:"foo"}] : ({ id: 1; } | { id: 2; name: string; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2, name:"foo"} : { id: number; name: string; }
+>{id:2, name:"foo"} : { id: 2; name: string; }
 >id : number
 >2 : 2
 >name : string
diff --git a/tests/baselines/reference/contextualTyping16.types b/tests/baselines/reference/contextualTyping16.types
index 6eded1712c1b0..50c24b04f0b7e 100644
--- a/tests/baselines/reference/contextualTyping16.types
+++ b/tests/baselines/reference/contextualTyping16.types
@@ -2,12 +2,12 @@
 var foo: {id:number;} = {id:4}; foo = {id:5};
 >foo : { id: number; }
 >id : number
->{id:4} : { id: number; }
+>{id:4} : { id: 4; }
 >id : number
 >4 : 4
->foo = {id:5} : { id: number; }
+>foo = {id:5} : { id: 5; }
 >foo : { id: number; }
->{id:5} : { id: number; }
+>{id:5} : { id: 5; }
 >id : number
 >5 : 5
 
diff --git a/tests/baselines/reference/contextualTyping17.errors.txt b/tests/baselines/reference/contextualTyping17.errors.txt
index b6375c9c9c954..c951aacb7dfce 100644
--- a/tests/baselines/reference/contextualTyping17.errors.txt
+++ b/tests/baselines/reference/contextualTyping17.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/compiler/contextualTyping17.ts(1,47): error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping17.ts(1,47): error TS2322: Type '{ id: 5; name: string; }' is not assignable to type '{ id: number; }'.
   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping17.ts (1 errors) ====
     var foo: {id:number;} = {id:4}; foo = {id: 5, name:"foo"};
                                                   ~~~~~~~~~~
-!!! error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '{ id: 5; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping17.types b/tests/baselines/reference/contextualTyping17.types
index 2f4d99353bc02..b3cb1e25ba621 100644
--- a/tests/baselines/reference/contextualTyping17.types
+++ b/tests/baselines/reference/contextualTyping17.types
@@ -2,12 +2,12 @@
 var foo: {id:number;} = {id:4}; foo = {id: 5, name:"foo"};
 >foo : { id: number; }
 >id : number
->{id:4} : { id: number; }
+>{id:4} : { id: 4; }
 >id : number
 >4 : 4
->foo = {id: 5, name:"foo"} : { id: number; name: string; }
+>foo = {id: 5, name:"foo"} : { id: 5; name: string; }
 >foo : { id: number; }
->{id: 5, name:"foo"} : { id: number; name: string; }
+>{id: 5, name:"foo"} : { id: 5; name: string; }
 >id : number
 >5 : 5
 >name : string
diff --git a/tests/baselines/reference/contextualTyping18.types b/tests/baselines/reference/contextualTyping18.types
index 3d5ee402828a1..737b9ee1e75e5 100644
--- a/tests/baselines/reference/contextualTyping18.types
+++ b/tests/baselines/reference/contextualTyping18.types
@@ -6,9 +6,9 @@ var foo: {id:number;} = <{id:number;}>({ }); foo = {id: 5};
 >id : number
 >({ }) : {}
 >{ } : {}
->foo = {id: 5} : { id: number; }
+>foo = {id: 5} : { id: 5; }
 >foo : { id: number; }
->{id: 5} : { id: number; }
+>{id: 5} : { id: 5; }
 >id : number
 >5 : 5
 
diff --git a/tests/baselines/reference/contextualTyping19.types b/tests/baselines/reference/contextualTyping19.types
index c5ad59fa61bee..b93fb68d45104 100644
--- a/tests/baselines/reference/contextualTyping19.types
+++ b/tests/baselines/reference/contextualTyping19.types
@@ -2,17 +2,17 @@
 var foo:{id:number;}[] = [{id:1}]; foo = [{id:1}, {id:2}];
 >foo : { id: number; }[]
 >id : number
->[{id:1}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}] : { id: 1; }[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->foo = [{id:1}, {id:2}] : { id: number; }[]
+>foo = [{id:1}, {id:2}] : ({ id: 1; } | { id: 2; })[]
 >foo : { id: number; }[]
->[{id:1}, {id:2}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2}] : ({ id: 1; } | { id: 2; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2} : { id: number; }
+>{id:2} : { id: 2; }
 >id : number
 >2 : 2
 
diff --git a/tests/baselines/reference/contextualTyping2.errors.txt b/tests/baselines/reference/contextualTyping2.errors.txt
index 1daa4a2a71f0d..7f16b6a372fba 100644
--- a/tests/baselines/reference/contextualTyping2.errors.txt
+++ b/tests/baselines/reference/contextualTyping2.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/compiler/contextualTyping2.ts(1,32): error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping2.ts(1,32): error TS2322: Type '{ id: 4; name: string; }' is not assignable to type '{ id: number; }'.
   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping2.ts (1 errors) ====
     var foo: {id:number;} = {id:4, name:"foo"};
                                    ~~~~~~~~~~
-!!! error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '{ id: 4; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping2.types b/tests/baselines/reference/contextualTyping2.types
index 3cd1231119351..acbaa55759738 100644
--- a/tests/baselines/reference/contextualTyping2.types
+++ b/tests/baselines/reference/contextualTyping2.types
@@ -2,7 +2,7 @@
 var foo: {id:number;} = {id:4, name:"foo"};
 >foo : { id: number; }
 >id : number
->{id:4, name:"foo"} : { id: number; name: string; }
+>{id:4, name:"foo"} : { id: 4; name: string; }
 >id : number
 >4 : 4
 >name : string
diff --git a/tests/baselines/reference/contextualTyping20.errors.txt b/tests/baselines/reference/contextualTyping20.errors.txt
index a9112f1db84d1..7ee5315a78f1d 100644
--- a/tests/baselines/reference/contextualTyping20.errors.txt
+++ b/tests/baselines/reference/contextualTyping20.errors.txt
@@ -1,13 +1,13 @@
-tests/cases/compiler/contextualTyping20.ts(1,58): error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-  Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-    Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping20.ts(1,58): error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+  Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+    Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping20.ts (1 errors) ====
     var foo:{id:number;}[] = [{id:1}]; foo = [{id:1}, {id:2, name:"foo"}];
                                                              ~~~~~~~~~~
-!!! error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-!!! error TS2322:   Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-!!! error TS2322:     Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+!!! error TS2322:   Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322:     Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping20.types b/tests/baselines/reference/contextualTyping20.types
index 83e7801a76aa5..1efa714d5c663 100644
--- a/tests/baselines/reference/contextualTyping20.types
+++ b/tests/baselines/reference/contextualTyping20.types
@@ -2,17 +2,17 @@
 var foo:{id:number;}[] = [{id:1}]; foo = [{id:1}, {id:2, name:"foo"}];
 >foo : { id: number; }[]
 >id : number
->[{id:1}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}] : { id: 1; }[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->foo = [{id:1}, {id:2, name:"foo"}] : ({ id: number; } | { id: number; name: string; })[]
+>foo = [{id:1}, {id:2, name:"foo"}] : ({ id: 1; } | { id: 2; name: string; })[]
 >foo : { id: number; }[]
->[{id:1}, {id:2, name:"foo"}] : ({ id: number; } | { id: number; name: string; })[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2, name:"foo"}] : ({ id: 1; } | { id: 2; name: string; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2, name:"foo"} : { id: number; name: string; }
+>{id:2, name:"foo"} : { id: 2; name: string; }
 >id : number
 >2 : 2
 >name : string
diff --git a/tests/baselines/reference/contextualTyping21.errors.txt b/tests/baselines/reference/contextualTyping21.errors.txt
index 0bac30d5b4462..6c805841a9750 100644
--- a/tests/baselines/reference/contextualTyping21.errors.txt
+++ b/tests/baselines/reference/contextualTyping21.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/compiler/contextualTyping21.ts(1,36): error TS2322: Type '(number | { id: number; })[]' is not assignable to type '{ id: number; }[]'.
-  Type 'number | { id: number; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping21.ts(1,36): error TS2322: Type '(number | { id: 1; })[]' is not assignable to type '{ id: number; }[]'.
+  Type 'number | { id: 1; }' is not assignable to type '{ id: number; }'.
     Type 'number' is not assignable to type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping21.ts (1 errors) ====
     var foo:{id:number;}[] = [{id:1}]; foo = [{id:1}, 1];
                                        ~~~
-!!! error TS2322: Type '(number | { id: number; })[]' is not assignable to type '{ id: number; }[]'.
-!!! error TS2322:   Type 'number | { id: number; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '(number | { id: 1; })[]' is not assignable to type '{ id: number; }[]'.
+!!! error TS2322:   Type 'number | { id: 1; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:     Type 'number' is not assignable to type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping21.types b/tests/baselines/reference/contextualTyping21.types
index 30c9820bd20cb..38b29a344cf19 100644
--- a/tests/baselines/reference/contextualTyping21.types
+++ b/tests/baselines/reference/contextualTyping21.types
@@ -2,14 +2,14 @@
 var foo:{id:number;}[] = [{id:1}]; foo = [{id:1}, 1];
 >foo : { id: number; }[]
 >id : number
->[{id:1}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}] : { id: 1; }[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->foo = [{id:1}, 1] : (number | { id: number; })[]
+>foo = [{id:1}, 1] : (number | { id: 1; })[]
 >foo : { id: number; }[]
->[{id:1}, 1] : (number | { id: number; })[]
->{id:1} : { id: number; }
+>[{id:1}, 1] : (number | { id: 1; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
 >1 : 1
diff --git a/tests/baselines/reference/contextualTyping23.types b/tests/baselines/reference/contextualTyping23.types
index 351ee51c28d4c..605d0bd5c9d64 100644
--- a/tests/baselines/reference/contextualTyping23.types
+++ b/tests/baselines/reference/contextualTyping23.types
@@ -3,9 +3,9 @@ var foo:(a:{():number; (i:number):number; })=>number; foo = function(a){return 5
 >foo : (a: { (): number; (i: number): number; }) => number
 >a : { (): number; (i: number): number; }
 >i : number
->foo = function(a){return 5} : (a: { (): number; (i: number): number; }) => number
+>foo = function(a){return 5} : (a: { (): number; (i: number): number; }) => 5
 >foo : (a: { (): number; (i: number): number; }) => number
->function(a){return 5} : (a: { (): number; (i: number): number; }) => number
+>function(a){return 5} : (a: { (): number; (i: number): number; }) => 5
 >a : { (): number; (i: number): number; }
 >5 : 5
 
diff --git a/tests/baselines/reference/contextualTyping24.errors.txt b/tests/baselines/reference/contextualTyping24.errors.txt
index ea97305062518..bafe2070bba79 100644
--- a/tests/baselines/reference/contextualTyping24.errors.txt
+++ b/tests/baselines/reference/contextualTyping24.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/contextualTyping24.ts(1,55): error TS2322: Type '(this: void, a: string) => number' is not assignable to type '(a: { (): number; (i: number): number; }) => number'.
+tests/cases/compiler/contextualTyping24.ts(1,55): error TS2322: Type '(this: void, a: string) => 5' is not assignable to type '(a: { (): number; (i: number): number; }) => number'.
   Types of parameters 'a' and 'a' are incompatible.
     Type '{ (): number; (i: number): number; }' is not assignable to type 'string'.
 
@@ -6,6 +6,6 @@ tests/cases/compiler/contextualTyping24.ts(1,55): error TS2322: Type '(this: voi
 ==== tests/cases/compiler/contextualTyping24.ts (1 errors) ====
     var foo:(a:{():number; (i:number):number; })=>number; foo = function(this: void, a:string){return 5};
                                                           ~~~
-!!! error TS2322: Type '(this: void, a: string) => number' is not assignable to type '(a: { (): number; (i: number): number; }) => number'.
+!!! error TS2322: Type '(this: void, a: string) => 5' is not assignable to type '(a: { (): number; (i: number): number; }) => number'.
 !!! error TS2322:   Types of parameters 'a' and 'a' are incompatible.
 !!! error TS2322:     Type '{ (): number; (i: number): number; }' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping24.types b/tests/baselines/reference/contextualTyping24.types
index 4d3f8cf1fb7aa..eca2125e38044 100644
--- a/tests/baselines/reference/contextualTyping24.types
+++ b/tests/baselines/reference/contextualTyping24.types
@@ -3,9 +3,9 @@ var foo:(a:{():number; (i:number):number; })=>number; foo = function(this: void,
 >foo : (a: { (): number; (i: number): number; }) => number
 >a : { (): number; (i: number): number; }
 >i : number
->foo = function(this: void, a:string){return 5} : (this: void, a: string) => number
+>foo = function(this: void, a:string){return 5} : (this: void, a: string) => 5
 >foo : (a: { (): number; (i: number): number; }) => number
->function(this: void, a:string){return 5} : (this: void, a: string) => number
+>function(this: void, a:string){return 5} : (this: void, a: string) => 5
 >this : void
 >a : string
 >5 : 5
diff --git a/tests/baselines/reference/contextualTyping28.types b/tests/baselines/reference/contextualTyping28.types
index bf246ce5b723b..0308b0ef4f4a2 100644
--- a/tests/baselines/reference/contextualTyping28.types
+++ b/tests/baselines/reference/contextualTyping28.types
@@ -4,6 +4,6 @@ function foo(param:number[]){}; foo([1]);
 >param : number[]
 >foo([1]) : void
 >foo : (param: number[]) => void
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
diff --git a/tests/baselines/reference/contextualTyping29.types b/tests/baselines/reference/contextualTyping29.types
index ba96d77393ccb..93f5d43388eab 100644
--- a/tests/baselines/reference/contextualTyping29.types
+++ b/tests/baselines/reference/contextualTyping29.types
@@ -4,7 +4,7 @@ function foo(param:number[]){}; foo([1, 3]);
 >param : number[]
 >foo([1, 3]) : void
 >foo : (param: number[]) => void
->[1, 3] : number[]
+>[1, 3] : (1 | 3)[]
 >1 : 1
 >3 : 3
 
diff --git a/tests/baselines/reference/contextualTyping3.types b/tests/baselines/reference/contextualTyping3.types
index c582cc0eb07af..b445905a9f459 100644
--- a/tests/baselines/reference/contextualTyping3.types
+++ b/tests/baselines/reference/contextualTyping3.types
@@ -3,7 +3,7 @@ class foo { public bar:{id:number;} = {id:5}; }
 >foo : foo
 >bar : { id: number; }
 >id : number
->{id:5} : { id: number; }
+>{id:5} : { id: 5; }
 >id : number
 >5 : 5
 
diff --git a/tests/baselines/reference/contextualTyping30.errors.txt b/tests/baselines/reference/contextualTyping30.errors.txt
index eda30769ac81d..3c125a5a38305 100644
--- a/tests/baselines/reference/contextualTyping30.errors.txt
+++ b/tests/baselines/reference/contextualTyping30.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/compiler/contextualTyping30.ts(1,37): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-  Type 'string | number' is not assignable to type 'number'.
+tests/cases/compiler/contextualTyping30.ts(1,37): error TS2345: Argument of type '(string | 1)[]' is not assignable to parameter of type 'number[]'.
+  Type 'string | 1' is not assignable to type 'number'.
     Type 'string' is not assignable to type 'number'.
 
 
 ==== tests/cases/compiler/contextualTyping30.ts (1 errors) ====
     function foo(param:number[]){}; foo([1, "a"]);
                                         ~~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-!!! error TS2345:   Type 'string | number' is not assignable to type 'number'.
+!!! error TS2345: Argument of type '(string | 1)[]' is not assignable to parameter of type 'number[]'.
+!!! error TS2345:   Type 'string | 1' is not assignable to type 'number'.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping31.types b/tests/baselines/reference/contextualTyping31.types
index 3b9da8bd4344f..77229d7ea5845 100644
--- a/tests/baselines/reference/contextualTyping31.types
+++ b/tests/baselines/reference/contextualTyping31.types
@@ -4,6 +4,6 @@ function foo(param:number[]){}; foo([1]);
 >param : number[]
 >foo([1]) : void
 >foo : (param: number[]) => void
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
diff --git a/tests/baselines/reference/contextualTyping34.types b/tests/baselines/reference/contextualTyping34.types
index 48dd3e41a66e5..1b4b00e8d2a97 100644
--- a/tests/baselines/reference/contextualTyping34.types
+++ b/tests/baselines/reference/contextualTyping34.types
@@ -3,8 +3,8 @@ var foo = <{ id: number;}> ({id:4});
 >foo : { id: number; }
 ><{ id: number;}> ({id:4}) : { id: number; }
 >id : number
->({id:4}) : { id: number; }
->{id:4} : { id: number; }
+>({id:4}) : { id: 4; }
+>{id:4} : { id: 4; }
 >id : number
 >4 : 4
 
diff --git a/tests/baselines/reference/contextualTyping35.types b/tests/baselines/reference/contextualTyping35.types
index 4465e0ca1a957..647adb7378273 100644
--- a/tests/baselines/reference/contextualTyping35.types
+++ b/tests/baselines/reference/contextualTyping35.types
@@ -3,7 +3,7 @@ var foo = <{ id: number;}> {id:4, name: "as"};
 >foo : { id: number; }
 ><{ id: number;}> {id:4, name: "as"} : { id: number; }
 >id : number
->{id:4, name: "as"} : { id: number; name: string; }
+>{id:4, name: "as"} : { id: 4; name: string; }
 >id : number
 >4 : 4
 >name : string
diff --git a/tests/baselines/reference/contextualTyping36.types b/tests/baselines/reference/contextualTyping36.types
index 2cd07e33ee6ef..77c0a0124afd9 100644
--- a/tests/baselines/reference/contextualTyping36.types
+++ b/tests/baselines/reference/contextualTyping36.types
@@ -4,7 +4,7 @@ var foo = <{ id: number; }[]>[{ id: 4 }, <{ id: number; }>({  })];
 ><{ id: number; }[]>[{ id: 4 }, <{ id: number; }>({  })] : { id: number; }[]
 >id : number
 >[{ id: 4 }, <{ id: number; }>({  })] : { id: number; }[]
->{ id: 4 } : { id: number; }
+>{ id: 4 } : { id: 4; }
 >id : number
 >4 : 4
 ><{ id: number; }>({  }) : { id: number; }
diff --git a/tests/baselines/reference/contextualTyping4.errors.txt b/tests/baselines/reference/contextualTyping4.errors.txt
index c472e7ccb18d0..81479dee0791c 100644
--- a/tests/baselines/reference/contextualTyping4.errors.txt
+++ b/tests/baselines/reference/contextualTyping4.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/compiler/contextualTyping4.ts(1,46): error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping4.ts(1,46): error TS2322: Type '{ id: 5; name: string; }' is not assignable to type '{ id: number; }'.
   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping4.ts (1 errors) ====
     class foo { public bar:{id:number;} = {id:5, name:"foo"}; }
                                                  ~~~~~~~~~~
-!!! error TS2322: Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '{ id: 5; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping4.types b/tests/baselines/reference/contextualTyping4.types
index a314dd5b21b3c..1d977a02599ac 100644
--- a/tests/baselines/reference/contextualTyping4.types
+++ b/tests/baselines/reference/contextualTyping4.types
@@ -3,7 +3,7 @@ class foo { public bar:{id:number;} = {id:5, name:"foo"}; }
 >foo : foo
 >bar : { id: number; }
 >id : number
->{id:5, name:"foo"} : { id: number; name: string; }
+>{id:5, name:"foo"} : { id: 5; name: string; }
 >id : number
 >5 : 5
 >name : string
diff --git a/tests/baselines/reference/contextualTyping6.types b/tests/baselines/reference/contextualTyping6.types
index 222212bdbf465..222b663a21e99 100644
--- a/tests/baselines/reference/contextualTyping6.types
+++ b/tests/baselines/reference/contextualTyping6.types
@@ -2,11 +2,11 @@
 var foo:{id:number;}[] = [{id:1}, {id:2}];
 >foo : { id: number; }[]
 >id : number
->[{id:1}, {id:2}] : { id: number; }[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2}] : ({ id: 1; } | { id: 2; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2} : { id: number; }
+>{id:2} : { id: 2; }
 >id : number
 >2 : 2
 
diff --git a/tests/baselines/reference/contextualTyping9.errors.txt b/tests/baselines/reference/contextualTyping9.errors.txt
index 4a12574fa2110..5a1ac71fed6ba 100644
--- a/tests/baselines/reference/contextualTyping9.errors.txt
+++ b/tests/baselines/reference/contextualTyping9.errors.txt
@@ -1,13 +1,13 @@
-tests/cases/compiler/contextualTyping9.ts(1,42): error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-  Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-    Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+tests/cases/compiler/contextualTyping9.ts(1,42): error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+  Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+    Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
 
 
 ==== tests/cases/compiler/contextualTyping9.ts (1 errors) ====
     var foo:{id:number;}[] = [{id:1}, {id:2, name:"foo"}];
                                              ~~~~~~~~~~
-!!! error TS2322: Type '({ id: number; } | { id: number; name: string; })[]' is not assignable to type '{ id: number; }[]'.
-!!! error TS2322:   Type '{ id: number; } | { id: number; name: string; }' is not assignable to type '{ id: number; }'.
-!!! error TS2322:     Type '{ id: number; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322: Type '({ id: 1; } | { id: 2; name: string; })[]' is not assignable to type '{ id: number; }[]'.
+!!! error TS2322:   Type '{ id: 1; } | { id: 2; name: string; }' is not assignable to type '{ id: number; }'.
+!!! error TS2322:     Type '{ id: 2; name: string; }' is not assignable to type '{ id: number; }'.
 !!! error TS2322:       Object literal may only specify known properties, and 'name' does not exist in type '{ id: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTyping9.types b/tests/baselines/reference/contextualTyping9.types
index d009b35689e1c..eb9481cd866fa 100644
--- a/tests/baselines/reference/contextualTyping9.types
+++ b/tests/baselines/reference/contextualTyping9.types
@@ -2,11 +2,11 @@
 var foo:{id:number;}[] = [{id:1}, {id:2, name:"foo"}];
 >foo : { id: number; }[]
 >id : number
->[{id:1}, {id:2, name:"foo"}] : ({ id: number; } | { id: number; name: string; })[]
->{id:1} : { id: number; }
+>[{id:1}, {id:2, name:"foo"}] : ({ id: 1; } | { id: 2; name: string; })[]
+>{id:1} : { id: 1; }
 >id : number
 >1 : 1
->{id:2, name:"foo"} : { id: number; name: string; }
+>{id:2, name:"foo"} : { id: 2; name: string; }
 >id : number
 >2 : 2
 >name : string
diff --git a/tests/baselines/reference/contextualTypingOfOptionalMembers.types b/tests/baselines/reference/contextualTypingOfOptionalMembers.types
index 515685f5c534d..d70ebab99dfce 100644
--- a/tests/baselines/reference/contextualTypingOfOptionalMembers.types
+++ b/tests/baselines/reference/contextualTypingOfOptionalMembers.types
@@ -45,7 +45,7 @@ declare function app<State, Actions extends ActionsObject<State>>(obj: Options<S
 app({
 >app({    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,}) : void
 >app : <State, Actions extends ActionsObject<State>>(obj: Options<State, Actions>) => void
->{    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,} : { state: number; actions: { foo: (s: number) => number; }; view: (s: number, a: ActionsObject<number>) => any; }
+>{    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,} : { state: 100; actions: { foo: (s: number) => number; }; view: (s: number, a: ActionsObject<number>) => any; }
 
     state: 100,
 >state : number
@@ -136,7 +136,7 @@ declare function app2<State, Actions extends ActionsObject<State>>(obj: Options2
 app2({
 >app2({    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,}) : void
 >app2 : <State, Actions extends ActionsObject<State>>(obj: Options2<State, Actions>) => void
->{    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,} : { state: number; actions: { foo: (s: number) => number; }; view: (s: number, a: ActionsObject<number>) => any; }
+>{    state: 100,    actions: {        foo: s => s // Should be typed number => number    },    view: (s, a) => undefined as any,} : { state: 100; actions: { foo: (s: number) => number; }; view: (s: number, a: ActionsObject<number>) => any; }
 
     state: 100,
 >state : number
@@ -185,7 +185,7 @@ declare function app3<State, Actions extends ActionsArray<State>>(obj: Options<S
 app3({
 >app3({    state: 100,    actions: [        s => s // Should be typed number => number    ],    view: (s, a) => undefined as any,}) : void
 >app3 : <State, Actions extends ((state: State) => State)[]>(obj: Options<State, Actions>) => void
->{    state: 100,    actions: [        s => s // Should be typed number => number    ],    view: (s, a) => undefined as any,} : { state: number; actions: ((s: number) => number)[]; view: (s: number, a: ((state: number) => number)[]) => any; }
+>{    state: 100,    actions: [        s => s // Should be typed number => number    ],    view: (s, a) => undefined as any,} : { state: 100; actions: ((s: number) => number)[]; view: (s: number, a: ((state: number) => number)[]) => any; }
 
     state: 100,
 >state : number
diff --git a/tests/baselines/reference/contextuallyTypedBindingInitializer.types b/tests/baselines/reference/contextuallyTypedBindingInitializer.types
index 4efd22a4c8426..fc8ff0816be7a 100644
--- a/tests/baselines/reference/contextuallyTypedBindingInitializer.types
+++ b/tests/baselines/reference/contextuallyTypedBindingInitializer.types
@@ -69,7 +69,7 @@ interface Tuples {
 function g({ prop = ["hello", 1234] }: Tuples) {}
 >g : ({ prop }: Tuples) => void
 >prop : [string, number]
->["hello", 1234] : [string, number]
+>["hello", 1234] : ["hello", 1234]
 >"hello" : "hello"
 >1234 : 1234
 >Tuples : Tuples
diff --git a/tests/baselines/reference/contextuallyTypedBindingInitializerNegative.types b/tests/baselines/reference/contextuallyTypedBindingInitializerNegative.types
index 1548e626e6da1..82c4924c33773 100644
--- a/tests/baselines/reference/contextuallyTypedBindingInitializerNegative.types
+++ b/tests/baselines/reference/contextuallyTypedBindingInitializerNegative.types
@@ -80,8 +80,8 @@ interface Tuples {
 }
 function g({ prop = [101, 1234] }: Tuples) {}
 >g : ({ prop }: Tuples) => void
->prop : [string, number] | [number, number]
->[101, 1234] : [number, number]
+>prop : [string, number] | [number, 1234]
+>[101, 1234] : [number, 1234]
 >101 : 101
 >1234 : 1234
 >Tuples : Tuples
@@ -94,7 +94,7 @@ interface StringUnion {
 }
 function h({ prop = "baz" }: StringUnion) {}
 >h : ({ prop }: StringUnion) => void
->prop : "foo" | "bar" | "baz"
+>prop : string
 >"baz" : "baz"
 >StringUnion : StringUnion
 
diff --git a/tests/baselines/reference/contextuallyTypedIife.types b/tests/baselines/reference/contextuallyTypedIife.types
index 7b86fe1f33786..ddcb8effb5a8e 100644
--- a/tests/baselines/reference/contextuallyTypedIife.types
+++ b/tests/baselines/reference/contextuallyTypedIife.types
@@ -179,7 +179,7 @@
 >({ q }) => q : ({ q }: { q: number; }) => number
 >q : number
 >q : number
->{ q : 13 } : { q: number; }
+>{ q : 13 } : { q: 13; }
 >q : number
 >13 : 13
 
@@ -190,7 +190,7 @@
 >p : number
 >14 : 14
 >p : number
->{ p : 15 } : { p: number; }
+>{ p : 15 } : { p: 15; }
 >p : number
 >15 : 15
 
@@ -200,21 +200,21 @@
 >({ r = 17 } = { r: 18 }) => r : ({ r }?: { r: number; }) => number
 >r : number
 >17 : 17
->{ r: 18 } : { r: number; }
+>{ r: 18 } : { r: 18; }
 >r : number
 >18 : 18
 >r : number
->{r : 19} : { r: number; }
+>{r : 19} : { r: 19; }
 >r : number
 >19 : 19
 
 (({ u = 22 } = { u: 23 }) => u)();
 >(({ u = 22 } = { u: 23 }) => u)() : number
->(({ u = 22 } = { u: 23 }) => u) : ({ u }?: { u?: number; }) => number
->({ u = 22 } = { u: 23 }) => u : ({ u }?: { u?: number; }) => number
+>(({ u = 22 } = { u: 23 }) => u) : ({ u }?: { u?: 23; }) => number
+>({ u = 22 } = { u: 23 }) => u : ({ u }?: { u?: 23; }) => number
 >u : number
 >22 : 22
->{ u: 23 } : { u?: number; }
+>{ u: 23 } : { u?: 23; }
 >u : number
 >23 : 23
 >u : number
diff --git a/tests/baselines/reference/contextuallyTypedIifeStrict.types b/tests/baselines/reference/contextuallyTypedIifeStrict.types
index 5a8a33ac41df2..5d722d8f11bb8 100644
--- a/tests/baselines/reference/contextuallyTypedIifeStrict.types
+++ b/tests/baselines/reference/contextuallyTypedIifeStrict.types
@@ -179,7 +179,7 @@
 >({ q }) => q : ({ q }: { q: number; }) => number
 >q : number
 >q : number
->{ q : 13 } : { q: number; }
+>{ q : 13 } : { q: 13; }
 >q : number
 >13 : 13
 
@@ -190,7 +190,7 @@
 >p : number
 >14 : 14
 >p : number
->{ p : 15 } : { p: number; }
+>{ p : 15 } : { p: 15; }
 >p : number
 >15 : 15
 
@@ -200,21 +200,21 @@
 >({ r = 17 } = { r: 18 }) => r : ({ r }?: { r: number; }) => number
 >r : number
 >17 : 17
->{ r: 18 } : { r: number; }
+>{ r: 18 } : { r: 18; }
 >r : number
 >18 : 18
 >r : number
->{r : 19} : { r: number; }
+>{r : 19} : { r: 19; }
 >r : number
 >19 : 19
 
 (({ u = 22 } = { u: 23 }) => u)();
 >(({ u = 22 } = { u: 23 }) => u)() : number
->(({ u = 22 } = { u: 23 }) => u) : ({ u }?: { u?: number; }) => number
->({ u = 22 } = { u: 23 }) => u : ({ u }?: { u?: number; }) => number
+>(({ u = 22 } = { u: 23 }) => u) : ({ u }?: { u?: 23; }) => number
+>({ u = 22 } = { u: 23 }) => u : ({ u }?: { u?: 23; }) => number
 >u : number
 >22 : 22
->{ u: 23 } : { u?: number; }
+>{ u: 23 } : { u?: 23; }
 >u : number
 >23 : 23
 >u : number
diff --git a/tests/baselines/reference/contextuallyTypingOrOperator.types b/tests/baselines/reference/contextuallyTypingOrOperator.types
index 3ca4ff4ee8f7e..d2f15ba7abe6a 100644
--- a/tests/baselines/reference/contextuallyTypingOrOperator.types
+++ b/tests/baselines/reference/contextuallyTypingOrOperator.types
@@ -11,9 +11,9 @@ var v: { a: (_: string) => number } = { a: s => s.length } || { a: s => 1 };
 >s.length : number
 >s : string
 >length : number
->{ a: s => 1 } : { a: (s: string) => number; }
->a : (s: string) => number
->s => 1 : (s: string) => number
+>{ a: s => 1 } : { a: (s: string) => 1; }
+>a : (s: string) => 1
+>s => 1 : (s: string) => 1
 >s : string
 >1 : 1
 
diff --git a/tests/baselines/reference/contextuallyTypingOrOperator2.types b/tests/baselines/reference/contextuallyTypingOrOperator2.types
index f72e6f3e92e5c..b1deb1eb24dd8 100644
--- a/tests/baselines/reference/contextuallyTypingOrOperator2.types
+++ b/tests/baselines/reference/contextuallyTypingOrOperator2.types
@@ -11,9 +11,9 @@ var v: { a: (_: string) => number } = { a: s => s.length } || { a: s => 1 };
 >s.length : number
 >s : string
 >length : number
->{ a: s => 1 } : { a: (s: string) => number; }
->a : (s: string) => number
->s => 1 : (s: string) => number
+>{ a: s => 1 } : { a: (s: string) => 1; }
+>a : (s: string) => 1
+>s => 1 : (s: string) => 1
 >s : string
 >1 : 1
 
diff --git a/tests/baselines/reference/controlFlowDeleteOperator.types b/tests/baselines/reference/controlFlowDeleteOperator.types
index 7c8cfc8dd6117..7c5f09d9f941b 100644
--- a/tests/baselines/reference/controlFlowDeleteOperator.types
+++ b/tests/baselines/reference/controlFlowDeleteOperator.types
@@ -6,7 +6,7 @@ function f() {
 >x : { a?: string | number | undefined; b: string | number; }
 >a : string | number | undefined
 >b : string | number
->{ b: 1 } : { b: number; }
+>{ b: 1 } : { b: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/controlFlowDestructuringDeclaration.types b/tests/baselines/reference/controlFlowDestructuringDeclaration.types
index 2815f2e1884b2..5d6ca10dffa29 100644
--- a/tests/baselines/reference/controlFlowDestructuringDeclaration.types
+++ b/tests/baselines/reference/controlFlowDestructuringDeclaration.types
@@ -22,7 +22,7 @@ function f2() {
 
     let [x]: [string | number] = [1];
 >x : string | number
->[1] : [number]
+>[1] : [1]
 >1 : 1
 
     x;
@@ -30,7 +30,7 @@ function f2() {
 
     let [y]: [string | undefined] = [""];
 >y : string | undefined
->[""] : [string]
+>[""] : [""]
 >"" : ""
 
     y;
@@ -51,7 +51,7 @@ function f3() {
 
     let [x]: (string | number)[] = [1];
 >x : string | number
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
     x;
@@ -59,7 +59,7 @@ function f3() {
 
     let [y]: (string | undefined)[] = [""];
 >y : string | undefined
->[""] : string[]
+>[""] : ""[]
 >"" : ""
 
     y;
@@ -81,7 +81,7 @@ function f4() {
     let { x }: { x: string | number } = { x: 1 };
 >x : string | number
 >x : string | number
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
@@ -91,7 +91,7 @@ function f4() {
     let { y }: { y: string | undefined } = { y: "" };
 >y : string | undefined
 >y : string | undefined
->{ y: "" } : { y: string; }
+>{ y: "" } : { y: ""; }
 >y : string
 >"" : ""
 
@@ -116,7 +116,7 @@ function f5() {
     let { x }: { x?: string | number } = { x: 1 };
 >x : string | number | undefined
 >x : string | number | undefined
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
@@ -126,7 +126,7 @@ function f5() {
     let { y }: { y?: string | undefined } = { y: "" };
 >y : string | undefined
 >y : string | undefined
->{ y: "" } : { y: string; }
+>{ y: "" } : { y: ""; }
 >y : string
 >"" : ""
 
@@ -180,7 +180,7 @@ function f7() {
     let o: { [x: string]: number } = { x: 1 };
 >o : { [x: string]: number; }
 >x : string
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/declarationEmitDestructuring2.js b/tests/baselines/reference/declarationEmitDestructuring2.js
index 09980c5c9dd11..0b302548e0298 100644
--- a/tests/baselines/reference/declarationEmitDestructuring2.js
+++ b/tests/baselines/reference/declarationEmitDestructuring2.js
@@ -21,8 +21,8 @@ function h1(_a) {
 
 //// [declarationEmitDestructuring2.d.ts]
 declare function f({x, y: [a, b, c, d]}?: {
-    x?: number;
-    y?: [number, number, number, number];
+    x?: 10;
+    y?: [2, 4, 6, 8];
 }): void;
 declare function g([a, b, c, d]?: [number, number, number, number]): void;
 declare function h([a, [b], [[c]], {x, y: [a, b, c], z: {a1, b1}}]: [any, [any], [[any]], {
diff --git a/tests/baselines/reference/declarationEmitDestructuring2.types b/tests/baselines/reference/declarationEmitDestructuring2.types
index 92677fce36fec..0bf506fd1f37f 100644
--- a/tests/baselines/reference/declarationEmitDestructuring2.types
+++ b/tests/baselines/reference/declarationEmitDestructuring2.types
@@ -1,6 +1,6 @@
 === tests/cases/compiler/declarationEmitDestructuring2.ts ===
 function f({x = 10, y: [a, b, c, d] = [1, 2, 3, 4]} = { x: 10, y: [2, 4, 6, 8] }) { }
->f : ({ x, y: [a, b, c, d] }?: { x?: number; y?: [number, number, number, number]; }) => void
+>f : ({ x, y: [a, b, c, d] }?: { x?: 10; y?: [2, 4, 6, 8]; }) => void
 >x : number
 >10 : 10
 >y : any
@@ -13,11 +13,11 @@ function f({x = 10, y: [a, b, c, d] = [1, 2, 3, 4]} = { x: 10, y: [2, 4, 6, 8] }
 >2 : 2
 >3 : 3
 >4 : 4
->{ x: 10, y: [2, 4, 6, 8] } : { x?: number; y?: [number, number, number, number]; }
+>{ x: 10, y: [2, 4, 6, 8] } : { x?: 10; y?: [2, 4, 6, 8]; }
 >x : number
 >10 : 10
->y : [number, number, number, number]
->[2, 4, 6, 8] : [number, number, number, number]
+>y : [2, 4, 6, 8]
+>[2, 4, 6, 8] : [2, 4, 6, 8]
 >2 : 2
 >4 : 4
 >6 : 6
diff --git a/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types b/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
index 26ef7db8a99b3..7c198a30eefb6 100644
--- a/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
+++ b/tests/baselines/reference/declarationEmitDestructuringArrayPattern2.types
@@ -15,7 +15,7 @@ var [x11 = 0, y11 = ""] = [1, "hello"];
 >0 : 0
 >y11 : string
 >"" : ""
->[1, "hello"] : [number, string]
+>[1, "hello"] : [1, "hello"]
 >1 : 1
 >"hello" : "hello"
 
@@ -38,11 +38,11 @@ var [a2, [b2, { x12, y12: c2 }]=["abc", { x12: 10, y12: false }]] = [1, ["hello"
 >10 : 10
 >y12 : boolean
 >false : false
->[1, ["hello", { x12: 5, y12: true }]] : [number, [string, { x12: number; y12: true; }]]
+>[1, ["hello", { x12: 5, y12: true }]] : [number, ["hello", { x12: 5; y12: true; }]]
 >1 : 1
->["hello", { x12: 5, y12: true }] : [string, { x12: number; y12: true; }]
+>["hello", { x12: 5, y12: true }] : ["hello", { x12: 5; y12: true; }]
 >"hello" : "hello"
->{ x12: 5, y12: true } : { x12: number; y12: true; }
+>{ x12: 5, y12: true } : { x12: 5; y12: true; }
 >x12 : number
 >5 : 5
 >y12 : boolean
diff --git a/tests/baselines/reference/declarationsAndAssignments.errors.txt b/tests/baselines/reference/declarationsAndAssignments.errors.txt
index 8f6d44a7c3a10..f0eea2cde3a6b 100644
--- a/tests/baselines/reference/declarationsAndAssignments.errors.txt
+++ b/tests/baselines/reference/declarationsAndAssignments.errors.txt
@@ -5,7 +5,7 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(23,25):
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(24,19): error TS2353: Object literal may only specify known properties, and 'x' does not exist in type '{ y: any; }'.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(28,28): error TS2353: Object literal may only specify known properties, and 'y' does not exist in type '{ x: any; }'.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(29,22): error TS2353: Object literal may only specify known properties, and 'x' does not exist in type '{ y: any; }'.
-tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(58,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'y' has type 'string | 1' at tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts 55:16, but here has type 'string'.
+tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(58,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'y' has type 'string | number' at tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts 55:16, but here has type 'string'.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,10): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,13): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(62,16): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
@@ -17,8 +17,8 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(73,11):
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(73,14): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(74,11): error TS2459: Type 'undefined[]' has no property 'a' and no string index signature.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(74,14): error TS2459: Type 'undefined[]' has no property 'b' and no string index signature.
-tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(106,5): error TS2345: Argument of type '[number, [string, { y: false; }]]' is not assignable to parameter of type '[number, [string, { x: any; y?: boolean; }]]'.
-  Type '[string, { y: false; }]' is not assignable to type '[string, { x: any; y?: boolean; }]'.
+tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(106,5): error TS2345: Argument of type '[2, ["abc", { y: false; }]]' is not assignable to parameter of type '[number, [string, { x: any; y?: boolean; }]]'.
+  Type '["abc", { y: false; }]' is not assignable to type '[string, { x: any; y?: boolean; }]'.
     Type '{ y: false; }' is not assignable to type '{ x: any; y?: boolean; }'.
       Property 'x' is missing in type '{ y: false; }'.
 tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,6): error TS2322: Type 'string' is not assignable to type 'number'.
@@ -99,7 +99,7 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
         var x: number;
         var y: string;
             ~
-!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'y' has type 'string | 1' at tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts 55:16, but here has type 'string'.
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'y' has type 'string | number' at tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts 55:16, but here has type 'string'.
     }
     
     function f8() {
@@ -171,8 +171,8 @@ tests/cases/conformance/es6/destructuring/declarationsAndAssignments.ts(138,9):
     f14([2, ["abc", { x: 0 }]]);
     f14([2, ["abc", { y: false }]]);  // Error, no x
         ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, [string, { y: false; }]]' is not assignable to parameter of type '[number, [string, { x: any; y?: boolean; }]]'.
-!!! error TS2345:   Type '[string, { y: false; }]' is not assignable to type '[string, { x: any; y?: boolean; }]'.
+!!! error TS2345: Argument of type '[2, ["abc", { y: false; }]]' is not assignable to parameter of type '[number, [string, { x: any; y?: boolean; }]]'.
+!!! error TS2345:   Type '["abc", { y: false; }]' is not assignable to type '[string, { x: any; y?: boolean; }]'.
 !!! error TS2345:     Type '{ y: false; }' is not assignable to type '{ x: any; y?: boolean; }'.
 !!! error TS2345:       Property 'x' is missing in type '{ y: false; }'.
     
diff --git a/tests/baselines/reference/declarationsAndAssignments.types b/tests/baselines/reference/declarationsAndAssignments.types
index 8e7187bef81a0..98b32af3dc7c6 100644
--- a/tests/baselines/reference/declarationsAndAssignments.types
+++ b/tests/baselines/reference/declarationsAndAssignments.types
@@ -221,7 +221,7 @@ function f6() {
 >0 : 0
 >y : string
 >"" : ""
->[1, "hello"] : [number, string]
+>[1, "hello"] : [1, "hello"]
 >1 : 1
 >"hello" : "hello"
 
@@ -238,9 +238,9 @@ function f7() {
     var [x = 0, y = 1] = [1, "hello"];  // Error, initializer for y must be string
 >x : number
 >0 : 0
->y : string | 1
+>y : string | number
 >1 : 1
->[1, "hello"] : [number, string]
+>[1, "hello"] : [1, string]
 >1 : 1
 >"hello" : "hello"
 
@@ -248,7 +248,7 @@ function f7() {
 >x : number
 
     var y: string;
->y : string | 1
+>y : string | number
 }
 
 function f8() {
@@ -363,11 +363,11 @@ function f12() {
 >10 : 10
 >y : boolean
 >false : false
->[1, ["hello", { x: 5, y: true }]] : [number, [string, { x: number; y: true; }]]
+>[1, ["hello", { x: 5, y: true }]] : [number, ["hello", { x: 5; y: true; }]]
 >1 : 1
->["hello", { x: 5, y: true }] : [string, { x: number; y: true; }]
+>["hello", { x: 5, y: true }] : ["hello", { x: 5; y: true; }]
 >"hello" : "hello"
->{ x: 5, y: true } : { x: number; y: true; }
+>{ x: 5, y: true } : { x: 5; y: true; }
 >x : number
 >5 : 5
 >y : boolean
@@ -433,9 +433,9 @@ function f14([a = 1, [b = "hello", { x, y: c = false }]]) {
 f14([2, ["abc", { x: 0, y: true }]]);
 >f14([2, ["abc", { x: 0, y: true }]]) : void
 >f14 : ([a, [b, { x, y: c }]]: [number, [string, { x: any; y?: boolean; }]]) => void
->[2, ["abc", { x: 0, y: true }]] : [number, [string, { x: number; y: true; }]]
+>[2, ["abc", { x: 0, y: true }]] : [2, ["abc", { x: number; y: true; }]]
 >2 : 2
->["abc", { x: 0, y: true }] : [string, { x: number; y: true; }]
+>["abc", { x: 0, y: true }] : ["abc", { x: number; y: true; }]
 >"abc" : "abc"
 >{ x: 0, y: true } : { x: number; y: true; }
 >x : number
@@ -446,9 +446,9 @@ f14([2, ["abc", { x: 0, y: true }]]);
 f14([2, ["abc", { x: 0 }]]);
 >f14([2, ["abc", { x: 0 }]]) : void
 >f14 : ([a, [b, { x, y: c }]]: [number, [string, { x: any; y?: boolean; }]]) => void
->[2, ["abc", { x: 0 }]] : [number, [string, { x: number; }]]
+>[2, ["abc", { x: 0 }]] : [2, ["abc", { x: number; }]]
 >2 : 2
->["abc", { x: 0 }] : [string, { x: number; }]
+>["abc", { x: 0 }] : ["abc", { x: number; }]
 >"abc" : "abc"
 >{ x: 0 } : { x: number; }
 >x : number
@@ -527,7 +527,7 @@ f17({});
 f17({ a: "hello" });
 >f17({ a: "hello" }) : void
 >f17 : ({ a, b, c }: { a?: string; b?: number; c?: boolean; }) => void
->{ a: "hello" } : { a: string; }
+>{ a: "hello" } : { a: "hello"; }
 >a : string
 >"hello" : "hello"
 
@@ -597,7 +597,7 @@ function f18() {
 >a : number
 
     [a = 1, b = "abc"] = [2, "def"];
->[a = 1, b = "abc"] = [2, "def"] : [number, string]
+>[a = 1, b = "abc"] = [2, "def"] : [2, "def"]
 >[a = 1, b = "abc"] : [number, string]
 >a = 1 : 1
 >a : number
@@ -605,7 +605,7 @@ function f18() {
 >b = "abc" : "abc"
 >b : string
 >"abc" : "abc"
->[2, "def"] : [number, string]
+>[2, "def"] : [2, "def"]
 >2 : 2
 >"def" : "def"
 }
@@ -646,7 +646,7 @@ function f19() {
 >a : any
 
     [[a, b] = [1, 2]] = [[2, 3]];
->[[a, b] = [1, 2]] = [[2, 3]] : [[number, number]]
+>[[a, b] = [1, 2]] = [[2, 3]] : [[2, 3]]
 >[[a, b] = [1, 2]] : [[number, number]]
 >[a, b] = [1, 2] : [number, number]
 >[a, b] : [any, any]
@@ -655,8 +655,8 @@ function f19() {
 >[1, 2] : [number, number]
 >1 : 1
 >2 : 2
->[[2, 3]] : [[number, number]]
->[2, 3] : [number, number]
+>[[2, 3]] : [[2, 3]]
+>[2, 3] : [2, 3]
 >2 : 2
 >3 : 3
 
@@ -722,47 +722,47 @@ function f20() {
 >3 : 3
 
     [...a] = [1, 2, 3];
->[...a] = [1, 2, 3] : number[]
+>[...a] = [1, 2, 3] : (1 | 2 | 3)[]
 >[...a] : number[]
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
 
     [x, ...a] = [1, 2, 3];
->[x, ...a] = [1, 2, 3] : number[]
+>[x, ...a] = [1, 2, 3] : (1 | 2 | 3)[]
 >[x, ...a] : number[]
 >x : number
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
 
     [x, y, ...a] = [1, 2, 3];
->[x, y, ...a] = [1, 2, 3] : number[]
+>[x, y, ...a] = [1, 2, 3] : (1 | 2 | 3)[]
 >[x, y, ...a] : number[]
 >x : number
 >y : number
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
 
     [x, y, z, ...a] = [1, 2, 3];
->[x, y, z, ...a] = [1, 2, 3] : number[]
+>[x, y, z, ...a] = [1, 2, 3] : (1 | 2 | 3)[]
 >[x, y, z, ...a] : number[]
 >x : number
 >y : number
 >z : number
 >...a : number
 >a : number[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/decrementOperatorWithNumberType.types b/tests/baselines/reference/decrementOperatorWithNumberType.types
index c81dc0660ecb2..10c401d479409 100644
--- a/tests/baselines/reference/decrementOperatorWithNumberType.types
+++ b/tests/baselines/reference/decrementOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/decrementOperatorWithNumberTypeInvalidOperations.types b/tests/baselines/reference/decrementOperatorWithNumberTypeInvalidOperations.types
index 3cebfcff9d8c0..6812c826dd090 100644
--- a/tests/baselines/reference/decrementOperatorWithNumberTypeInvalidOperations.types
+++ b/tests/baselines/reference/decrementOperatorWithNumberTypeInvalidOperations.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/decrementOperatorWithUnsupportedStringType.types b/tests/baselines/reference/decrementOperatorWithUnsupportedStringType.types
index c22b39a3e6d38..044f701519b4c 100644
--- a/tests/baselines/reference/decrementOperatorWithUnsupportedStringType.types
+++ b/tests/baselines/reference/decrementOperatorWithUnsupportedStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", ""];
 >STRING1 : string[]
->["", ""] : string[]
+>["", ""] : ""[]
 >"" : ""
 >"" : ""
 
diff --git a/tests/baselines/reference/deleteOperatorWithNumberType.types b/tests/baselines/reference/deleteOperatorWithNumberType.types
index e3a26b618e1fd..02dd521c3b190 100644
--- a/tests/baselines/reference/deleteOperatorWithNumberType.types
+++ b/tests/baselines/reference/deleteOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/deleteOperatorWithStringType.types b/tests/baselines/reference/deleteOperatorWithStringType.types
index 842ad281ef77d..0dc3f4c97e89e 100644
--- a/tests/baselines/reference/deleteOperatorWithStringType.types
+++ b/tests/baselines/reference/deleteOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/deleteReadonly.types b/tests/baselines/reference/deleteReadonly.types
index 77295796afda6..15dde3f965956 100644
--- a/tests/baselines/reference/deleteReadonly.types
+++ b/tests/baselines/reference/deleteReadonly.types
@@ -32,7 +32,7 @@ interface B {
 var b: B = {
 >b : B
 >B : B
->{  'test': 'test'} : { 'test': string; }
+>{  'test': 'test'} : { 'test': "test"; }
 
   'test': 'test'
 >'test' : "test"
diff --git a/tests/baselines/reference/derivedClassConstructorWithExplicitReturns01.types b/tests/baselines/reference/derivedClassConstructorWithExplicitReturns01.types
index dbcac43d5bd75..e718d736b4553 100644
--- a/tests/baselines/reference/derivedClassConstructorWithExplicitReturns01.types
+++ b/tests/baselines/reference/derivedClassConstructorWithExplicitReturns01.types
@@ -14,14 +14,14 @@ class C {
 >value : number
 
         return {
->{            cProp: value,            foo() {                return "well this looks kinda C-ish.";            }        } : { cProp: number; foo(): string; }
+>{            cProp: value,            foo() {                return "well this looks kinda C-ish.";            }        } : { cProp: number; foo(): "well this looks kinda C-ish."; }
 
             cProp: value,
 >cProp : number
 >value : number
 
             foo() {
->foo : () => string
+>foo : () => "well this looks kinda C-ish."
 
                 return "well this looks kinda C-ish.";
 >"well this looks kinda C-ish." : "well this looks kinda C-ish."
@@ -60,7 +60,7 @@ class D extends C {
 >"You win!" : "You win!"
 
             return {
->{                cProp: 1,                dProp: () => this,                foo() { return "You win!!!!!" }            } : { cProp: number; dProp: () => this; foo(): string; }
+>{                cProp: 1,                dProp: () => this,                foo() { return "You win!!!!!" }            } : { cProp: 1; dProp: () => this; foo(): "You win!!!!!"; }
 
                 cProp: 1,
 >cProp : number
@@ -72,7 +72,7 @@ class D extends C {
 >this : this
 
                 foo() { return "You win!!!!!" }
->foo : () => string
+>foo : () => "You win!!!!!"
 >"You win!!!!!" : "You win!!!!!"
 
             };
diff --git a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.errors.txt b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.errors.txt
index 19bf8d1ff2284..c6fa5cc8bf148 100644
--- a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.errors.txt
+++ b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/memberFunctionDeclarations/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.ts(14,36): error TS2345: Argument of type '{ a: number; b: number; }' is not assignable to parameter of type '{ a: number; }'.
+tests/cases/conformance/classes/propertyMemberDeclarations/memberFunctionDeclarations/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.ts(14,36): error TS2345: Argument of type '{ a: 1; b: number; }' is not assignable to parameter of type '{ a: number; }'.
   Object literal may only specify known properties, and 'b' does not exist in type '{ a: number; }'.
 
 
@@ -18,7 +18,7 @@ tests/cases/conformance/classes/propertyMemberDeclarations/memberFunctionDeclara
             var r = super.foo({ a: 1 }); // { a: number }
             var r2 = super.foo({ a: 1, b: 2 }); // { a: number }
                                        ~~~~
-!!! error TS2345: Argument of type '{ a: number; b: number; }' is not assignable to parameter of type '{ a: number; }'.
+!!! error TS2345: Argument of type '{ a: 1; b: number; }' is not assignable to parameter of type '{ a: number; }'.
 !!! error TS2345:   Object literal may only specify known properties, and 'b' does not exist in type '{ a: number; }'.
             var r3 = this.foo({ a: 1, b: 2 }); // { a: number; b: number; }
         }
diff --git a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.types b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.types
index a5e997f96ebd4..73c3e9de92f46 100644
--- a/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.types
+++ b/tests/baselines/reference/derivedTypeAccessesHiddenBaseCallViaSuperPropertyAccess.types
@@ -38,7 +38,7 @@ class Derived extends Base {
 >super.foo : (x: { a: number; }) => { a: number; }
 >super : Base
 >foo : (x: { a: number; }) => { a: number; }
->{ a: 1 } : { a: number; }
+>{ a: 1 } : { a: 1; }
 >a : number
 >1 : 1
 
@@ -60,7 +60,7 @@ class Derived extends Base {
 >this.foo : (x: { a: number; b: number; }) => { a: number; b: number; }
 >this : this
 >foo : (x: { a: number; b: number; }) => { a: number; b: number; }
->{ a: 1, b: 2 } : { a: number; b: number; }
+>{ a: 1, b: 2 } : { a: 1; b: 2; }
 >a : number
 >1 : 1
 >b : number
diff --git a/tests/baselines/reference/destructureOptionalParameter.types b/tests/baselines/reference/destructureOptionalParameter.types
index 18a6d7675dd41..fd96118550b35 100644
--- a/tests/baselines/reference/destructureOptionalParameter.types
+++ b/tests/baselines/reference/destructureOptionalParameter.types
@@ -12,7 +12,7 @@ function f2({ a, b }: { a: number, b: number } = { a: 0, b: 0 }) {
 >b : number
 >a : number
 >b : number
->{ a: 0, b: 0 } : { a: number; b: number; }
+>{ a: 0, b: 0 } : { a: 0; b: 0; }
 >a : number
 >0 : 0
 >b : number
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
index d0d8561b8080d..a62414e57b987 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5.types
@@ -50,7 +50,7 @@ var [b3, b4, b5]: [number, number, string] = [1, 2, "string"];
 >b3 : number
 >b4 : number
 >b5 : string
->[1, 2, "string"] : [number, number, string]
+>[1, 2, "string"] : [1, 2, "string"]
 >1 : 1
 >2 : 2
 >"string" : "string"
@@ -109,8 +109,8 @@ var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
 >c6 : boolean
->[[1], true] : [[number], true]
->[1] : [number]
+>[[1], true] : [[1], true]
+>[1] : [1]
 >1 : 1
 >true : true
 
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
index 09dc481c477b8..4cc26a9e6749f 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES5iterable.types
@@ -50,7 +50,7 @@ var [b3, b4, b5]: [number, number, string] = [1, 2, "string"];
 >b3 : number
 >b4 : number
 >b5 : string
->[1, 2, "string"] : [number, number, string]
+>[1, 2, "string"] : [1, 2, "string"]
 >1 : 1
 >2 : 2
 >"string" : "string"
@@ -109,8 +109,8 @@ var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
 >c6 : boolean
->[[1], true] : [[number], true]
->[1] : [number]
+>[[1], true] : [[1], true]
+>[1] : [1]
 >1 : 1
 >true : true
 
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
index a07ea6ca017d9..d09da8f410104 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment1ES6.types
@@ -50,7 +50,7 @@ var [b3, b4, b5]: [number, number, string] = [1, 2, "string"];
 >b3 : number
 >b4 : number
 >b5 : string
->[1, 2, "string"] : [number, number, string]
+>[1, 2, "string"] : [1, 2, "string"]
 >1 : 1
 >2 : 2
 >"string" : "string"
@@ -109,8 +109,8 @@ var [[[c3]], [[[[c4]]]]] = [[[]], [[[[]]]]]
 var [[c5], c6]: [[string|number], boolean] = [[1], true];
 >c5 : string | number
 >c6 : boolean
->[[1], true] : [[number], true]
->[1] : [number]
+>[[1], true] : [[1], true]
+>[1] : [1]
 >1 : 1
 >true : true
 
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt
index 7fba74522e2e2..6601e489425fa 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.errors.txt
@@ -1,8 +1,8 @@
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,6): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(3,12): error TS2525: Initializer provides no value for this binding element and the binding element has no default value.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(4,5): error TS2461: Type 'undefined' is not an array type.
-tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(9,5): error TS2322: Type '[number, 2, string]' is not assignable to type '[number, boolean, string]'.
-  Type '2' is not assignable to type 'boolean'.
+tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(9,5): error TS2322: Type '[1, number, "string"]' is not assignable to type '[number, boolean, string]'.
+  Type 'number' is not assignable to type 'boolean'.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(22,5): error TS2322: Type 'number[]' is not assignable to type '[number, number]'.
   Property '0' is missing in type 'number[]'.
 tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAssignment2.ts(23,5): error TS2322: Type 'number[]' is not assignable to type '[string, string]'.
@@ -27,8 +27,8 @@ tests/cases/conformance/es6/destructuring/destructuringArrayBindingPatternAndAss
     //        where N is the numeric index of E in the array assignment pattern, or
     var [b0, b1, b2]: [number, boolean, string] = [1, 2, "string"];  // Error
         ~~~~~~~~~~~~
-!!! error TS2322: Type '[number, 2, string]' is not assignable to type '[number, boolean, string]'.
-!!! error TS2322:   Type '2' is not assignable to type 'boolean'.
+!!! error TS2322: Type '[1, number, "string"]' is not assignable to type '[number, boolean, string]'.
+!!! error TS2322:   Type 'number' is not assignable to type 'boolean'.
     interface J extends Array<Number> {
         2: number;
     }
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
index a19cba3e63a2a..946202083c97e 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment2.types
@@ -18,7 +18,7 @@ var [b0, b1, b2]: [number, boolean, string] = [1, 2, "string"];  // Error
 >b0 : number
 >b1 : boolean
 >b2 : string
->[1, 2, "string"] : [number, 2, string]
+>[1, 2, "string"] : [1, number, "string"]
 >1 : 1
 >2 : 2
 >"string" : "string"
@@ -37,13 +37,13 @@ function bar(): J {
 
     return <[number, number, number]>[1, 2, 3];
 ><[number, number, number]>[1, 2, 3] : [number, number, number]
->[1, 2, 3] : [number, number, number]
+>[1, 2, 3] : [1, 2, 3]
 >1 : 1
 >2 : 2
 >3 : 3
 }
 var [b3 = "string", b4, b5] = bar();  // Error
->b3 : Number | "string"
+>b3 : string | Number
 >"string" : "string"
 >b4 : Number
 >b5 : Number
diff --git a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
index 542a8ad1b3610..6fb536baa6af8 100644
--- a/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
+++ b/tests/baselines/reference/destructuringArrayBindingPatternAndAssignment3.types
@@ -35,7 +35,7 @@ const [f, g = f, h = i, i = f] = [1]; // error for h = i
 >a : number
 
 })([1]);
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
 (function ([c, d = c, e = e]) { // error for e = e
@@ -49,7 +49,7 @@ const [f, g = f, h = i, i = f] = [1]; // error for h = i
 >e : any
 
 })([1]);
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
 (function ([f, g = f, h = i, i = f]) { // error for h = i
@@ -65,6 +65,6 @@ const [f, g = f, h = i, i = f] = [1]; // error for h = i
 >f : number
 
 })([1])
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
diff --git a/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES5.types b/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES5.types
index 203815fa9c866..6246ba521bb5a 100644
--- a/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES5.types
+++ b/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES5.types
@@ -27,9 +27,9 @@ var { b2: { b21 } = { b21: "string" }  } = { b2: { b21: "world" } };
 >{ b21: "string" } : { b21: string; }
 >b21 : string
 >"string" : "string"
->{ b2: { b21: "world" } } : { b2?: { b21: string; }; }
->b2 : { b21: string; }
->{ b21: "world" } : { b21: string; }
+>{ b2: { b21: "world" } } : { b2?: { b21: "world"; }; }
+>b2 : { b21: "world"; }
+>{ b21: "world" } : { b21: "world"; }
 >b21 : string
 >"world" : "world"
 
@@ -114,7 +114,7 @@ function foo1(): F1 {
 >F1 : F1
 
     return {
->{        "prop1": 2    } : { "prop1": number; }
+>{        "prop1": 2    } : { "prop1": 2; }
 
         "prop1": 2
 >2 : 2
diff --git a/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES6.types b/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES6.types
index 1c3d1f4d00c75..5a7bd1eedd544 100644
--- a/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES6.types
+++ b/tests/baselines/reference/destructuringObjectBindingPatternAndAssignment1ES6.types
@@ -27,9 +27,9 @@ var { b2: { b21 } = { b21: "string" }  } = { b2: { b21: "world" } };
 >{ b21: "string" } : { b21: string; }
 >b21 : string
 >"string" : "string"
->{ b2: { b21: "world" } } : { b2?: { b21: string; }; }
->b2 : { b21: string; }
->{ b21: "world" } : { b21: string; }
+>{ b2: { b21: "world" } } : { b2?: { b21: "world"; }; }
+>b2 : { b21: "world"; }
+>{ b21: "world" } : { b21: "world"; }
 >b21 : string
 >"world" : "world"
 
@@ -114,7 +114,7 @@ function foo1(): F1 {
 >F1 : F1
 
     return {
->{        "prop1": 2    } : { "prop1": number; }
+>{        "prop1": 2    } : { "prop1": 2; }
 
         "prop1": 2
 >2 : 2
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration1ES5.errors.txt
index fbbfc3b0d218d..bab853a5df220 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5.ts(12,4): error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5.ts(12,4): error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5.ts(57,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
@@ -22,7 +22,7 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5.
     a1([1, 2, [["world"]]]);
     a1([1, 2, [["world"]], 3]);
        ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+!!! error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
 !!! error TS2345:   Types of property 'length' are incompatible.
 !!! error TS2345:     Type '4' is not assignable to type '3'.
     
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5.types b/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
index c7a5c44f1d46d..88b10aac5a358 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5.types
@@ -44,11 +44,11 @@ function a4({x, a}: { x: number, a: number }) { }
 a1([1, 2, [["world"]]]);
 >a1([1, 2, [["world"]]]) : void
 >a1 : ([a, b, [[c]]]: [number, number, string[][]]) => void
->[1, 2, [["world"]]] : [number, number, string[][]]
+>[1, 2, [["world"]]] : [1, 2, "world"[][]]
 >1 : 1
 >2 : 2
->[["world"]] : string[][]
->["world"] : string[]
+>[["world"]] : "world"[][]
+>["world"] : "world"[]
 >"world" : "world"
 
 a1([1, 2, [["world"]], 3]);
@@ -153,7 +153,7 @@ b2("string", { x: 200, y: "string" });
 >b2("string", { x: 200, y: "string" }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: "string" } : { x: number; y: string; }
+>{ x: 200, y: "string" } : { x: 200; y: string; }
 >x : number
 >200 : 200
 >y : string
@@ -163,7 +163,7 @@ b2("string", { x: 200, y: true });
 >b2("string", { x: 200, y: true }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: true } : { x: number; y: boolean; }
+>{ x: 200, y: true } : { x: 200; y: boolean; }
 >x : number
 >200 : 200
 >y : boolean
@@ -218,7 +218,7 @@ function c3({b}: { b: number|string} = { b: "hello" }) { }
 >c3 : ({ b }?: { b: string | number; }) => void
 >b : string | number
 >b : string | number
->{ b: "hello" } : { b: string; }
+>{ b: "hello" } : { b: "hello"; }
 >b : string
 >"hello" : "hello"
 
@@ -268,7 +268,7 @@ c1();             // Implied type is {z:number}?
 c1({ z: 1 })      // Implied type is {z:number}? 
 >c1({ z: 1 }) : void
 >c1 : ({ z }?: { z: number; }) => void
->{ z: 1 } : { z: number; }
+>{ z: 1 } : { z: 1; }
 >z : number
 >1 : 1
 
@@ -280,14 +280,14 @@ c2({});         // Implied type is {z?: number}
 c2({z:1});      // Implied type is {z?: number}
 >c2({z:1}) : void
 >c2 : ({ z }: { z?: number; }) => void
->{z:1} : { z: number; }
+>{z:1} : { z: 1; }
 >z : number
 >1 : 1
 
 c3({ b: 1 });     // Implied type is { b: number|string }.
 >c3({ b: 1 }) : void
 >c3 : ({ b }?: { b: string | number; }) => void
->{ b: 1 } : { b: number; }
+>{ b: 1 } : { b: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.errors.txt
index 1dc3c61bb3a6e..5d9073f90638b 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5iterable.ts(12,4): error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5iterable.ts(12,4): error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5iterable.ts(57,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
@@ -22,7 +22,7 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES5i
     a1([1, 2, [["world"]]]);
     a1([1, 2, [["world"]], 3]);
        ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+!!! error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
 !!! error TS2345:   Types of property 'length' are incompatible.
 !!! error TS2345:     Type '4' is not assignable to type '3'.
     
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
index b41a202758660..2c29b2eb097f2 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES5iterable.types
@@ -44,11 +44,11 @@ function a4({x, a}: { x: number, a: number }) { }
 a1([1, 2, [["world"]]]);
 >a1([1, 2, [["world"]]]) : void
 >a1 : ([a, b, [[c]]]: [number, number, string[][]]) => void
->[1, 2, [["world"]]] : [number, number, string[][]]
+>[1, 2, [["world"]]] : [1, 2, "world"[][]]
 >1 : 1
 >2 : 2
->[["world"]] : string[][]
->["world"] : string[]
+>[["world"]] : "world"[][]
+>["world"] : "world"[]
 >"world" : "world"
 
 a1([1, 2, [["world"]], 3]);
@@ -153,7 +153,7 @@ b2("string", { x: 200, y: "string" });
 >b2("string", { x: 200, y: "string" }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: "string" } : { x: number; y: string; }
+>{ x: 200, y: "string" } : { x: 200; y: string; }
 >x : number
 >200 : 200
 >y : string
@@ -163,7 +163,7 @@ b2("string", { x: 200, y: true });
 >b2("string", { x: 200, y: true }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: true } : { x: number; y: boolean; }
+>{ x: 200, y: true } : { x: 200; y: boolean; }
 >x : number
 >200 : 200
 >y : boolean
@@ -218,7 +218,7 @@ function c3({b}: { b: number|string} = { b: "hello" }) { }
 >c3 : ({ b }?: { b: string | number; }) => void
 >b : string | number
 >b : string | number
->{ b: "hello" } : { b: string; }
+>{ b: "hello" } : { b: "hello"; }
 >b : string
 >"hello" : "hello"
 
@@ -268,7 +268,7 @@ c1();             // Implied type is {z:number}?
 c1({ z: 1 })      // Implied type is {z:number}?
 >c1({ z: 1 }) : void
 >c1 : ({ z }?: { z: number; }) => void
->{ z: 1 } : { z: number; }
+>{ z: 1 } : { z: 1; }
 >z : number
 >1 : 1
 
@@ -280,14 +280,14 @@ c2({});         // Implied type is {z?: number}
 c2({z:1});      // Implied type is {z?: number}
 >c2({z:1}) : void
 >c2 : ({ z }: { z?: number; }) => void
->{z:1} : { z: number; }
+>{z:1} : { z: 1; }
 >z : number
 >1 : 1
 
 c3({ b: 1 });     // Implied type is { b: number|string }.
 >c3({ b: 1 }) : void
 >c3 : ({ b }?: { b: string | number; }) => void
->{ b: 1 } : { b: number; }
+>{ b: 1 } : { b: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES6.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration1ES6.errors.txt
index f6c17a5c0ea6e..daa74c2e8d610 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES6.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES6.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES6.ts(14,4): error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES6.ts(14,4): error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES6.ts(58,4): error TS2345: Argument of type '[number, number, [[string]], boolean, boolean]' is not assignable to parameter of type '[any, any, [[any]]]'.
@@ -25,7 +25,7 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration1ES6.
     a1([1, 2, [["world"]]]);
     a1([1, 2, [["world"]], 3]);
        ~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, number, string[][], number]' is not assignable to parameter of type '[number, number, string[][]]'.
+!!! error TS2345: Argument of type '[1, 2, "world"[][], 3]' is not assignable to parameter of type '[number, number, string[][]]'.
 !!! error TS2345:   Types of property 'length' are incompatible.
 !!! error TS2345:     Type '4' is not assignable to type '3'.
     
diff --git a/tests/baselines/reference/destructuringParameterDeclaration1ES6.types b/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
index 9de904efdec64..2c08864ae3f87 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration1ES6.types
@@ -46,11 +46,11 @@ function a4({x, a}: { x: number, a: number }) { }
 a1([1, 2, [["world"]]]);
 >a1([1, 2, [["world"]]]) : void
 >a1 : ([a, b, [[c]]]: [number, number, string[][]]) => void
->[1, 2, [["world"]]] : [number, number, string[][]]
+>[1, 2, [["world"]]] : [1, 2, "world"[][]]
 >1 : 1
 >2 : 2
->[["world"]] : string[][]
->["world"] : string[]
+>[["world"]] : "world"[][]
+>["world"] : "world"[]
 >"world" : "world"
 
 a1([1, 2, [["world"]], 3]);
@@ -156,7 +156,7 @@ b2("string", { x: 200, y: "string" });
 >b2("string", { x: 200, y: "string" }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: "string" } : { x: number; y: string; }
+>{ x: 200, y: "string" } : { x: 200; y: string; }
 >x : number
 >200 : 200
 >y : string
@@ -166,7 +166,7 @@ b2("string", { x: 200, y: true });
 >b2("string", { x: 200, y: true }) : void
 >b2 : (z?: any, o?: { x: number; y: any; }) => void
 >"string" : "string"
->{ x: 200, y: true } : { x: number; y: boolean; }
+>{ x: 200, y: true } : { x: 200; y: boolean; }
 >x : number
 >200 : 200
 >y : boolean
@@ -201,7 +201,7 @@ function c3({b}: { b: number|string} = { b: "hello" }) { }
 >c3 : ({ b }?: { b: string | number; }) => void
 >b : string | number
 >b : string | number
->{ b: "hello" } : { b: string; }
+>{ b: "hello" } : { b: "hello"; }
 >b : string
 >"hello" : "hello"
 
@@ -251,7 +251,7 @@ c1();             // Implied type is {z:number}?
 c1({ z: 1 })      // Implied type is {z:number}? 
 >c1({ z: 1 }) : void
 >c1 : ({ z }?: { z: number; }) => void
->{ z: 1 } : { z: number; }
+>{ z: 1 } : { z: 1; }
 >z : number
 >1 : 1
 
@@ -263,14 +263,14 @@ c2({});         // Implied type is {z?: number}
 c2({z:1});      // Implied type is {z?: number}
 >c2({z:1}) : void
 >c2 : ({ z }: { z?: number; }) => void
->{z:1} : { z: number; }
+>{z:1} : { z: 1; }
 >z : number
 >1 : 1
 
 c3({ b: 1 });     // Implied type is { b: number|string }.
 >c3({ b: 1 }) : void
 >c3 : ({ b }?: { b: string | number; }) => void
->{ b: 1 } : { b: number; }
+>{ b: 1 } : { b: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
index 96b934236607e..521ba1c8eb7fa 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration2.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(7,4): error TS2345: Argument of type '[number, string, string[][]]' is not assignable to parameter of type '[number, number, string[][]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(7,4): error TS2345: Argument of type '[1, string, "world"[][]]' is not assignable to parameter of type '[number, number, string[][]]'.
   Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(7,29): error TS1005: ',' expected.
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(8,4): error TS2345: Argument of type '[number, number, string[][], string]' is not assignable to parameter of type '[number, number, string[][]]'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(8,4): error TS2345: Argument of type '[1, 2, "world"[][], string]' is not assignable to parameter of type '[number, number, string[][]]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '3'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(16,8): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
@@ -55,13 +55,13 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration2.ts(
     function a0([a, b, [[c]]]: [number, number, string[][]]) { }
     a0([1, "string", [["world"]]);      // Error
        ~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, string, string[][]]' is not assignable to parameter of type '[number, number, string[][]]'.
+!!! error TS2345: Argument of type '[1, string, "world"[][]]' is not assignable to parameter of type '[number, number, string[][]]'.
 !!! error TS2345:   Type 'string' is not assignable to type 'number'.
                                 ~
 !!! error TS1005: ',' expected.
     a0([1, 2, [["world"]], "string"]);  // Error
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, number, string[][], string]' is not assignable to parameter of type '[number, number, string[][]]'.
+!!! error TS2345: Argument of type '[1, 2, "world"[][], string]' is not assignable to parameter of type '[number, number, string[][]]'.
 !!! error TS2345:   Types of property 'length' are incompatible.
 !!! error TS2345:     Type '4' is not assignable to type '3'.
     
diff --git a/tests/baselines/reference/destructuringParameterDeclaration2.types b/tests/baselines/reference/destructuringParameterDeclaration2.types
index 5810f5bca98cd..aab90cb80edb2 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration2.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration2.types
@@ -127,7 +127,7 @@ function c3({b}: { b: number|string } = { b: "hello" }) { }
 >c3 : ({ b }?: { b: string | number; }) => void
 >b : string | number
 >b : string | number
->{ b: "hello" } : { b: string; }
+>{ b: "hello" } : { b: "hello"; }
 >b : string
 >"hello" : "hello"
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5.types b/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
index 33e0d3b6bd868..e01fa3c8decb8 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5.types
@@ -137,7 +137,7 @@ a10([1, 2]);                              // Parameter type is any[]
 a11([1, 2]);                              // Parameter type is number[]
 >a11([1, 2]) : void
 >a11 : ([a, b, c, ...x]: number[]) => void
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
index 931e149ffe2b4..eb64b72ddb307 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES5iterable.types
@@ -137,7 +137,7 @@ a10([1, 2]);                              // Parameter type is any[]
 a11([1, 2]);                              // Parameter type is number[]
 >a11([1, 2]) : void
 >a11 : ([a, b, c, ...x]: number[]) => void
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration3ES6.types b/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
index dc5e64d2c2cea..7591cfb3d725a 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
+++ b/tests/baselines/reference/destructuringParameterDeclaration3ES6.types
@@ -137,7 +137,7 @@ a10([1, 2]);                              // Parameter type is any[]
 a11([1, 2]);                              // Parameter type is number[]
 >a11([1, 2]) : void
 >a11 : ([a, b, c, ...x]: number[]) => void
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt b/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
index cdc7938d1af64..093c12f7d48af 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
+++ b/tests/baselines/reference/destructuringParameterDeclaration4.errors.txt
@@ -9,8 +9,8 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(
     Type 'string' is not assignable to type '[[any]]'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(23,4): error TS2345: Argument of type '[number, number]' is not assignable to parameter of type '[any, any, [[any]]]'.
   Property '2' is missing in type '[number, number]'.
-tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(24,4): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-  Type 'string | number' is not assignable to type 'number'.
+tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(24,4): error TS2345: Argument of type '(string | 1 | 2)[]' is not assignable to parameter of type 'number[]'.
+  Type 'string | 1 | 2' is not assignable to type 'number'.
     Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(29,17): error TS1317: A parameter property cannot be declared using a rest parameter.
 tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(34,22): error TS2304: Cannot find name 'E1'.
@@ -62,8 +62,8 @@ tests/cases/conformance/es6/destructuring/destructuringParameterDeclaration4.ts(
 !!! error TS2345:   Property '2' is missing in type '[number, number]'.
     a6([1, 2, "string"]);                   // Error, parameter type is number[]
        ~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-!!! error TS2345:   Type 'string | number' is not assignable to type 'number'.
+!!! error TS2345: Argument of type '(string | 1 | 2)[]' is not assignable to parameter of type 'number[]'.
+!!! error TS2345:   Type 'string | 1 | 2' is not assignable to type 'number'.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     
     
diff --git a/tests/baselines/reference/destructuringParameterProperties1.types b/tests/baselines/reference/destructuringParameterProperties1.types
index e1bdd8b263168..5c3926b1061cc 100644
--- a/tests/baselines/reference/destructuringParameterProperties1.types
+++ b/tests/baselines/reference/destructuringParameterProperties1.types
@@ -51,7 +51,7 @@ c1 = new C1(["larry", "{curly}", "moe"]);
 >c1 : C1
 >new C1(["larry", "{curly}", "moe"]) : C1
 >C1 : typeof C1
->["larry", "{curly}", "moe"] : string[]
+>["larry", "{curly}", "moe"] : ("larry" | "{curly}" | "moe")[]
 >"larry" : "larry"
 >"{curly}" : "{curly}"
 >"moe" : "moe"
@@ -78,7 +78,7 @@ var c2 = new C2(["10", 10, !!10]);
 >c2 : C2
 >new C2(["10", 10, !!10]) : C2
 >C2 : typeof C2
->["10", 10, !!10] : [string, number, boolean]
+>["10", 10, !!10] : ["10", 10, boolean]
 >"10" : "10"
 >10 : 10
 >!!10 : boolean
@@ -104,7 +104,7 @@ var c3 = new C3({x: 0, y: "", z: false});
 >c3 : C3
 >new C3({x: 0, y: "", z: false}) : C3
 >C3 : typeof C3
->{x: 0, y: "", z: false} : { x: number; y: string; z: false; }
+>{x: 0, y: "", z: false} : { x: 0; y: ""; z: false; }
 >x : number
 >0 : 0
 >y : string
@@ -117,7 +117,7 @@ c3 = new C3({x: 0, "y": "y", z: true});
 >c3 : C3
 >new C3({x: 0, "y": "y", z: true}) : C3
 >C3 : typeof C3
->{x: 0, "y": "y", z: true} : { x: number; "y": string; z: true; }
+>{x: 0, "y": "y", z: true} : { x: 0; "y": "y"; z: true; }
 >x : number
 >0 : 0
 >"y" : "y"
diff --git a/tests/baselines/reference/destructuringParameterProperties2.errors.txt b/tests/baselines/reference/destructuringParameterProperties2.errors.txt
index d47e50db85384..759eadeb52a9c 100644
--- a/tests/baselines/reference/destructuringParameterProperties2.errors.txt
+++ b/tests/baselines/reference/destructuringParameterProperties2.errors.txt
@@ -5,8 +5,8 @@ tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(4
 tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(9,21): error TS2339: Property 'a' does not exist on type 'C1'.
 tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(13,21): error TS2339: Property 'b' does not exist on type 'C1'.
 tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(17,21): error TS2339: Property 'c' does not exist on type 'C1'.
-tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(21,27): error TS2345: Argument of type '[number, undefined, ""]' is not assignable to parameter of type '[number, string, boolean]'.
-  Type '""' is not assignable to type 'boolean'.
+tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(21,27): error TS2345: Argument of type '[0, undefined, string]' is not assignable to parameter of type '[number, string, boolean]'.
+  Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts (8 errors) ====
@@ -46,8 +46,8 @@ tests/cases/conformance/es6/destructuring/destructuringParameterProperties2.ts(2
     
     var x = new C1(undefined, [0, undefined, ""]);
                               ~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[number, undefined, ""]' is not assignable to parameter of type '[number, string, boolean]'.
-!!! error TS2345:   Type '""' is not assignable to type 'boolean'.
+!!! error TS2345: Argument of type '[0, undefined, string]' is not assignable to parameter of type '[number, string, boolean]'.
+!!! error TS2345:   Type 'string' is not assignable to type 'boolean'.
     var [x_a, x_b, x_c] = [x.getA(), x.getB(), x.getC()];
     
     var y = new C1(10, [0, "", true]);
diff --git a/tests/baselines/reference/destructuringParameterProperties2.types b/tests/baselines/reference/destructuringParameterProperties2.types
index 3b9ea8d273f3a..4bbc487d937a0 100644
--- a/tests/baselines/reference/destructuringParameterProperties2.types
+++ b/tests/baselines/reference/destructuringParameterProperties2.types
@@ -103,7 +103,7 @@ var y = new C1(10, [0, "", true]);
 >new C1(10, [0, "", true]) : C1
 >C1 : typeof C1
 >10 : 10
->[0, "", true] : [number, string, true]
+>[0, "", true] : [0, "", true]
 >0 : 0
 >"" : ""
 >true : true
@@ -131,7 +131,7 @@ var z = new C1(10, [undefined, "", null]);
 >new C1(10, [undefined, "", null]) : C1
 >C1 : typeof C1
 >10 : 10
->[undefined, "", null] : [undefined, string, null]
+>[undefined, "", null] : [undefined, "", null]
 >undefined : undefined
 >"" : ""
 >null : null
diff --git a/tests/baselines/reference/destructuringParameterProperties3.types b/tests/baselines/reference/destructuringParameterProperties3.types
index 34c683941c7ad..af8a301beb10a 100644
--- a/tests/baselines/reference/destructuringParameterProperties3.types
+++ b/tests/baselines/reference/destructuringParameterProperties3.types
@@ -82,7 +82,7 @@ var x = new C1(undefined, [0, true, ""]);
 >new C1(undefined, [0, true, ""]) : C1<number, boolean, string>
 >C1 : typeof C1
 >undefined : undefined
->[0, true, ""] : [number, true, string]
+>[0, true, ""] : [0, true, ""]
 >0 : 0
 >true : true
 >"" : ""
@@ -110,7 +110,7 @@ var y = new C1(10, [0, true, true]);
 >new C1(10, [0, true, true]) : C1<number, boolean, boolean>
 >C1 : typeof C1
 >10 : 10
->[0, true, true] : [number, true, true]
+>[0, true, true] : [0, true, true]
 >0 : 0
 >true : true
 >true : true
@@ -138,7 +138,7 @@ var z = new C1(10, [undefined, "", ""]);
 >new C1(10, [undefined, "", ""]) : C1<10, string, string>
 >C1 : typeof C1
 >10 : 10
->[undefined, "", ""] : [undefined, string, string]
+>[undefined, "", ""] : [undefined, "", ""]
 >undefined : undefined
 >"" : ""
 >"" : ""
diff --git a/tests/baselines/reference/destructuringTypeGuardFlow.types b/tests/baselines/reference/destructuringTypeGuardFlow.types
index e04dfa645c9ca..58fd616a2a006 100644
--- a/tests/baselines/reference/destructuringTypeGuardFlow.types
+++ b/tests/baselines/reference/destructuringTypeGuardFlow.types
@@ -24,13 +24,13 @@ type foo = {
 const aFoo: foo = { bar: 3, baz: "b", nested: { a: 1, b: "y" } };
 >aFoo : foo
 >foo : foo
->{ bar: 3, baz: "b", nested: { a: 1, b: "y" } } : { bar: number; baz: string; nested: { a: number; b: string; }; }
+>{ bar: 3, baz: "b", nested: { a: 1, b: "y" } } : { bar: 3; baz: "b"; nested: { a: 1; b: "y"; }; }
 >bar : number
 >3 : 3
 >baz : string
 >"b" : "b"
->nested : { a: number; b: string; }
->{ a: 1, b: "y" } : { a: number; b: string; }
+>nested : { a: 1; b: "y"; }
+>{ a: 1, b: "y" } : { a: 1; b: "y"; }
 >a : number
 >1 : 1
 >b : string
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES5.types b/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
index 6f95b19843409..789a73a917eb2 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES5.types
@@ -6,7 +6,7 @@ var {a1, a2}: { a1: number, a2: string } = { a1: 10, a2: "world" }
 >a2 : string
 >a1 : number
 >a2 : string
->{ a1: 10, a2: "world" } : { a1: number; a2: string; }
+>{ a1: 10, a2: "world" } : { a1: 10; a2: "world"; }
 >a1 : number
 >10 : 10
 >a2 : string
@@ -16,10 +16,10 @@ var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [["hello"]], true];
 >a3 : number
 >a4 : string
 >a5 : boolean
->[1, [["hello"]], true] : [number, [[string]], true]
+>[1, [["hello"]], true] : [1, [["hello"]], true]
 >1 : 1
->[["hello"]] : [[string]]
->["hello"] : [string]
+>[["hello"]] : [["hello"]]
+>["hello"] : ["hello"]
 >"hello" : "hello"
 >true : true
 
@@ -31,9 +31,9 @@ var { b1: { b11 } = { b11: "string" }  } = { b1: { b11: "world" } };
 >{ b11: "string" } : { b11: string; }
 >b11 : string
 >"string" : "string"
->{ b1: { b11: "world" } } : { b1?: { b11: string; }; }
->b1 : { b11: string; }
->{ b11: "world" } : { b11: string; }
+>{ b1: { b11: "world" } } : { b1?: { b11: "world"; }; }
+>b1 : { b11: "world"; }
+>{ b11: "world" } : { b11: "world"; }
 >b11 : string
 >"world" : "world"
 
@@ -52,19 +52,19 @@ var [b2 = 3, b3 = true, b4 = temp] = [3, false, { t1: false, t2: "hello" }];
 >true : true
 >b4 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
->[3, false, { t1: false, t2: "hello" }] : [number, false, { t1: false; t2: string; }]
+>[3, false, { t1: false, t2: "hello" }] : [3, false, { t1: false; t2: "hello"; }]
 >3 : 3
 >false : false
->{ t1: false, t2: "hello" } : { t1: false; t2: string; }
+>{ t1: false, t2: "hello" } : { t1: false; t2: "hello"; }
 >t1 : boolean
 >false : false
 >t2 : string
 >"hello" : "hello"
 
 var [b5 = 3, b6 = true, b7 = temp] = [undefined, undefined, undefined];
->b5 : 3
+>b5 : number
 >3 : 3
->b6 : true
+>b6 : boolean
 >true : true
 >b7 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
@@ -132,12 +132,12 @@ var {e: [e1, e2, e3 = { b1: 1000, b4: 200 }]} = { e: [1, 2, { b1: 4, b4: 0 }] };
 >1000 : 1000
 >b4 : number
 >200 : 200
->{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: number; b4: number; }]; }
->e : [number, number, { b1: number; b4: number; }]
->[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: number; b4: number; }]
+>{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: 4; b4: 0; }]; }
+>e : [number, number, { b1: 4; b4: 0; }]
+>[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: 4; b4: 0; }]
 >1 : 1
 >2 : 2
->{ b1: 4, b4: 0 } : { b1: number; b4: number; }
+>{ b1: 4, b4: 0 } : { b1: 4; b4: 0; }
 >b1 : number
 >4 : 4
 >b4 : number
@@ -189,11 +189,11 @@ var {h: {h1 = [undefined, null]}}: { h: { h1: number[] } } = { h: { h1: [1, 2] }
 >null : null
 >h : { h1: number[]; }
 >h1 : number[]
->{ h: { h1: [1, 2] } } : { h: { h1: number[]; }; }
->h : { h1: number[]; }
->{ h1: [1, 2] } : { h1: number[]; }
->h1 : number[]
->[1, 2] : number[]
+>{ h: { h1: [1, 2] } } : { h: { h1: (1 | 2)[]; }; }
+>h : { h1: (1 | 2)[]; }
+>{ h1: [1, 2] } : { h1: (1 | 2)[]; }
+>h1 : (1 | 2)[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types b/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
index 6ef4c3d574979..461785c626925 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES5iterable.types
@@ -6,7 +6,7 @@ var {a1, a2}: { a1: number, a2: string } = { a1: 10, a2: "world" }
 >a2 : string
 >a1 : number
 >a2 : string
->{ a1: 10, a2: "world" } : { a1: number; a2: string; }
+>{ a1: 10, a2: "world" } : { a1: 10; a2: "world"; }
 >a1 : number
 >10 : 10
 >a2 : string
@@ -16,10 +16,10 @@ var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [["hello"]], true];
 >a3 : number
 >a4 : string
 >a5 : boolean
->[1, [["hello"]], true] : [number, [[string]], true]
+>[1, [["hello"]], true] : [1, [["hello"]], true]
 >1 : 1
->[["hello"]] : [[string]]
->["hello"] : [string]
+>[["hello"]] : [["hello"]]
+>["hello"] : ["hello"]
 >"hello" : "hello"
 >true : true
 
@@ -31,9 +31,9 @@ var { b1: { b11 } = { b11: "string" }  } = { b1: { b11: "world" } };
 >{ b11: "string" } : { b11: string; }
 >b11 : string
 >"string" : "string"
->{ b1: { b11: "world" } } : { b1?: { b11: string; }; }
->b1 : { b11: string; }
->{ b11: "world" } : { b11: string; }
+>{ b1: { b11: "world" } } : { b1?: { b11: "world"; }; }
+>b1 : { b11: "world"; }
+>{ b11: "world" } : { b11: "world"; }
 >b11 : string
 >"world" : "world"
 
@@ -52,19 +52,19 @@ var [b2 = 3, b3 = true, b4 = temp] = [3, false, { t1: false, t2: "hello" }];
 >true : true
 >b4 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
->[3, false, { t1: false, t2: "hello" }] : [number, false, { t1: false; t2: string; }]
+>[3, false, { t1: false, t2: "hello" }] : [3, false, { t1: false; t2: "hello"; }]
 >3 : 3
 >false : false
->{ t1: false, t2: "hello" } : { t1: false; t2: string; }
+>{ t1: false, t2: "hello" } : { t1: false; t2: "hello"; }
 >t1 : boolean
 >false : false
 >t2 : string
 >"hello" : "hello"
 
 var [b5 = 3, b6 = true, b7 = temp] = [undefined, undefined, undefined];
->b5 : 3
+>b5 : number
 >3 : 3
->b6 : true
+>b6 : boolean
 >true : true
 >b7 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
@@ -132,12 +132,12 @@ var {e: [e1, e2, e3 = { b1: 1000, b4: 200 }]} = { e: [1, 2, { b1: 4, b4: 0 }] };
 >1000 : 1000
 >b4 : number
 >200 : 200
->{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: number; b4: number; }]; }
->e : [number, number, { b1: number; b4: number; }]
->[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: number; b4: number; }]
+>{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: 4; b4: 0; }]; }
+>e : [number, number, { b1: 4; b4: 0; }]
+>[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: 4; b4: 0; }]
 >1 : 1
 >2 : 2
->{ b1: 4, b4: 0 } : { b1: number; b4: number; }
+>{ b1: 4, b4: 0 } : { b1: 4; b4: 0; }
 >b1 : number
 >4 : 4
 >b4 : number
@@ -189,11 +189,11 @@ var {h: {h1 = [undefined, null]}}: { h: { h1: number[] } } = { h: { h1: [1, 2] }
 >null : null
 >h : { h1: number[]; }
 >h1 : number[]
->{ h: { h1: [1, 2] } } : { h: { h1: number[]; }; }
->h : { h1: number[]; }
->{ h1: [1, 2] } : { h1: number[]; }
->h1 : number[]
->[1, 2] : number[]
+>{ h: { h1: [1, 2] } } : { h: { h1: (1 | 2)[]; }; }
+>h : { h1: (1 | 2)[]; }
+>{ h1: [1, 2] } : { h1: (1 | 2)[]; }
+>h1 : (1 | 2)[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringVariableDeclaration1ES6.types b/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
index d01326991c0d4..7264d5bb4b9b7 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration1ES6.types
@@ -6,7 +6,7 @@ var {a1, a2}: { a1: number, a2: string } = { a1: 10, a2: "world" }
 >a2 : string
 >a1 : number
 >a2 : string
->{ a1: 10, a2: "world" } : { a1: number; a2: string; }
+>{ a1: 10, a2: "world" } : { a1: 10; a2: "world"; }
 >a1 : number
 >10 : 10
 >a2 : string
@@ -16,10 +16,10 @@ var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [["hello"]], true];
 >a3 : number
 >a4 : string
 >a5 : boolean
->[1, [["hello"]], true] : [number, [[string]], true]
+>[1, [["hello"]], true] : [1, [["hello"]], true]
 >1 : 1
->[["hello"]] : [[string]]
->["hello"] : [string]
+>[["hello"]] : [["hello"]]
+>["hello"] : ["hello"]
 >"hello" : "hello"
 >true : true
 
@@ -31,9 +31,9 @@ var { b1: { b11 } = { b11: "string" }  } = { b1: { b11: "world" } };
 >{ b11: "string" } : { b11: string; }
 >b11 : string
 >"string" : "string"
->{ b1: { b11: "world" } } : { b1?: { b11: string; }; }
->b1 : { b11: string; }
->{ b11: "world" } : { b11: string; }
+>{ b1: { b11: "world" } } : { b1?: { b11: "world"; }; }
+>b1 : { b11: "world"; }
+>{ b11: "world" } : { b11: "world"; }
 >b11 : string
 >"world" : "world"
 
@@ -52,19 +52,19 @@ var [b2 = 3, b3 = true, b4 = temp] = [3, false, { t1: false, t2: "hello" }];
 >true : true
 >b4 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
->[3, false, { t1: false, t2: "hello" }] : [number, false, { t1: false; t2: string; }]
+>[3, false, { t1: false, t2: "hello" }] : [3, false, { t1: false; t2: "hello"; }]
 >3 : 3
 >false : false
->{ t1: false, t2: "hello" } : { t1: false; t2: string; }
+>{ t1: false, t2: "hello" } : { t1: false; t2: "hello"; }
 >t1 : boolean
 >false : false
 >t2 : string
 >"hello" : "hello"
 
 var [b5 = 3, b6 = true, b7 = temp] = [undefined, undefined, undefined];
->b5 : 3
+>b5 : number
 >3 : 3
->b6 : true
+>b6 : boolean
 >true : true
 >b7 : { t1: boolean; t2: string; }
 >temp : { t1: boolean; t2: string; }
@@ -132,12 +132,12 @@ var {e: [e1, e2, e3 = { b1: 1000, b4: 200 }]} = { e: [1, 2, { b1: 4, b4: 0 }] };
 >1000 : 1000
 >b4 : number
 >200 : 200
->{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: number; b4: number; }]; }
->e : [number, number, { b1: number; b4: number; }]
->[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: number; b4: number; }]
+>{ e: [1, 2, { b1: 4, b4: 0 }] } : { e: [number, number, { b1: 4; b4: 0; }]; }
+>e : [number, number, { b1: 4; b4: 0; }]
+>[1, 2, { b1: 4, b4: 0 }] : [number, number, { b1: 4; b4: 0; }]
 >1 : 1
 >2 : 2
->{ b1: 4, b4: 0 } : { b1: number; b4: number; }
+>{ b1: 4, b4: 0 } : { b1: 4; b4: 0; }
 >b1 : number
 >4 : 4
 >b4 : number
@@ -189,11 +189,11 @@ var {h: {h1 = [undefined, null]}}: { h: { h1: number[] } } = { h: { h1: [1, 2] }
 >null : null
 >h : { h1: number[]; }
 >h1 : number[]
->{ h: { h1: [1, 2] } } : { h: { h1: number[]; }; }
->h : { h1: number[]; }
->{ h1: [1, 2] } : { h1: number[]; }
->h1 : number[]
->[1, 2] : number[]
+>{ h: { h1: [1, 2] } } : { h: { h1: (1 | 2)[]; }; }
+>h : { h1: (1 | 2)[]; }
+>{ h1: [1, 2] } : { h1: (1 | 2)[]; }
+>h1 : (1 | 2)[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt b/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
index c831b10a467fb..c9b72856b4637 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
+++ b/tests/baselines/reference/destructuringVariableDeclaration2.errors.txt
@@ -1,7 +1,7 @@
 tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(3,5): error TS2322: Type '{ a1: boolean; a2: number; }' is not assignable to type '{ a1: number; a2: string; }'.
   Types of property 'a1' are incompatible.
     Type 'boolean' is not assignable to type 'number'.
-tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(4,5): error TS2322: Type '[number, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
+tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(4,5): error TS2322: Type '[1, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
   Type '[[boolean]]' is not assignable to type '[[string]]'.
     Type '[boolean]' is not assignable to type '[string]'.
       Type 'boolean' is not assignable to type 'string'.
@@ -19,7 +19,7 @@ tests/cases/conformance/es6/destructuring/destructuringVariableDeclaration2.ts(1
 !!! error TS2322:     Type 'boolean' is not assignable to type 'number'.
     var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [[false]], true];  // Error
         ~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '[number, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
+!!! error TS2322: Type '[1, [[boolean]], true]' is not assignable to type '[number, [[string]], boolean]'.
 !!! error TS2322:   Type '[[boolean]]' is not assignable to type '[[string]]'.
 !!! error TS2322:     Type '[boolean]' is not assignable to type '[string]'.
 !!! error TS2322:       Type 'boolean' is not assignable to type 'string'.
diff --git a/tests/baselines/reference/destructuringVariableDeclaration2.types b/tests/baselines/reference/destructuringVariableDeclaration2.types
index 2a977ee73f457..b6d1d9bd57c7d 100644
--- a/tests/baselines/reference/destructuringVariableDeclaration2.types
+++ b/tests/baselines/reference/destructuringVariableDeclaration2.types
@@ -16,7 +16,7 @@ var [a3, [[a4]], a5]: [number, [[string]], boolean] = [1, [[false]], true];  //
 >a3 : number
 >a4 : string
 >a5 : boolean
->[1, [[false]], true] : [number, [[boolean]], true]
+>[1, [[false]], true] : [1, [[boolean]], true]
 >1 : 1
 >[[false]] : [[boolean]]
 >[false] : [boolean]
@@ -40,7 +40,7 @@ var [b0 = 3, b1 = true, b2 = temp] = [3, false, { t1: false, t2: 5}];  // Error
 >true : true
 >b2 : { t1: boolean; t2: string; } | { t1: false; t2: number; }
 >temp : { t1: boolean; t2: string; }
->[3, false, { t1: false, t2: 5}] : [number, false, { t1: false; t2: number; }]
+>[3, false, { t1: false, t2: 5}] : [3, false, { t1: false; t2: number; }]
 >3 : 3
 >false : false
 >{ t1: false, t2: 5} : { t1: false; t2: number; }
@@ -80,11 +80,11 @@ var {d: {d1 = ["string", null]}}: { d: { d1: number[] } } = { d: { d1: [1, 2] }
 >null : null
 >d : { d1: number[]; }
 >d1 : number[]
->{ d: { d1: [1, 2] } } : { d: { d1: number[]; }; }
->d : { d1: number[]; }
->{ d1: [1, 2] } : { d1: number[]; }
->d1 : number[]
->[1, 2] : number[]
+>{ d: { d1: [1, 2] } } : { d: { d1: (1 | 2)[]; }; }
+>d : { d1: (1 | 2)[]; }
+>{ d1: [1, 2] } : { d1: (1 | 2)[]; }
+>d1 : (1 | 2)[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/destructuringWithLiteralInitializers.types b/tests/baselines/reference/destructuringWithLiteralInitializers.types
index 51c432f7605b7..24c968441423e 100644
--- a/tests/baselines/reference/destructuringWithLiteralInitializers.types
+++ b/tests/baselines/reference/destructuringWithLiteralInitializers.types
@@ -31,7 +31,7 @@ f2({ x: 1 });
 f2({ x: 1, y: 1 });
 >f2({ x: 1, y: 1 }) : void
 >f2 : ({ x, y }: { x: any; y?: number; }) => void
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: number; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -53,21 +53,21 @@ f3({});
 f3({ x: 1 });
 >f3({ x: 1 }) : void
 >f3 : ({ x, y }: { x?: number; y?: number; }) => void
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
 f3({ y: 1 });
 >f3({ y: 1 }) : void
 >f3 : ({ x, y }: { x?: number; y?: number; }) => void
->{ y: 1 } : { y: number; }
+>{ y: 1 } : { y: 1; }
 >y : number
 >1 : 1
 
 f3({ x: 1, y: 1 });
 >f3({ x: 1, y: 1 }) : void
 >f3 : ({ x, y }: { x?: number; y?: number; }) => void
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -91,7 +91,7 @@ f4();
 f4({ x: 1, y: 1 });
 >f4({ x: 1, y: 1 }) : void
 >f4 : ({ x, y }?: { x: number; y: number; }) => void
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -114,14 +114,14 @@ f5();
 f5({ x: 1 });
 >f5({ x: 1 }) : void
 >f5 : ({ x, y }?: { x: number; y?: number; }) => void
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
 f5({ x: 1, y: 1 });
 >f5({ x: 1, y: 1 }) : void
 >f5 : ({ x, y }?: { x: number; y?: number; }) => void
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -148,21 +148,21 @@ f6({});
 f6({ x: 1 });
 >f6({ x: 1 }) : void
 >f6 : ({ x, y }?: { x?: number; y?: number; }) => void
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
 f6({ y: 1 });
 >f6({ y: 1 }) : void
 >f6 : ({ x, y }?: { x?: number; y?: number; }) => void
->{ y: 1 } : { y: number; }
+>{ y: 1 } : { y: 1; }
 >y : number
 >1 : 1
 
 f6({ x: 1, y: 1 });
 >f6({ x: 1, y: 1 }) : void
 >f6 : ({ x, y }?: { x?: number; y?: number; }) => void
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -194,27 +194,27 @@ f7({ a: {} });
 f7({ a: { x: 1 } });
 >f7({ a: { x: 1 } }) : void
 >f7 : ({ a: { x, y } }?: { a: { x?: number; y?: number; }; }) => void
->{ a: { x: 1 } } : { a: { x: number; }; }
->a : { x: number; }
->{ x: 1 } : { x: number; }
+>{ a: { x: 1 } } : { a: { x: 1; }; }
+>a : { x: 1; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
 f7({ a: { y: 1 } });
 >f7({ a: { y: 1 } }) : void
 >f7 : ({ a: { x, y } }?: { a: { x?: number; y?: number; }; }) => void
->{ a: { y: 1 } } : { a: { y: number; }; }
->a : { y: number; }
->{ y: 1 } : { y: number; }
+>{ a: { y: 1 } } : { a: { y: 1; }; }
+>a : { y: 1; }
+>{ y: 1 } : { y: 1; }
 >y : number
 >1 : 1
 
 f7({ a: { x: 1, y: 1 } });
 >f7({ a: { x: 1, y: 1 } }) : void
 >f7 : ({ a: { x, y } }?: { a: { x?: number; y?: number; }; }) => void
->{ a: { x: 1, y: 1 } } : { a: { x: number; y: number; }; }
->a : { x: number; y: number; }
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ a: { x: 1, y: 1 } } : { a: { x: 1; y: 1; }; }
+>a : { x: 1; y: 1; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -244,7 +244,7 @@ function g2([x = 0, y = 0]) { }
 g2([1, 1]);
 >g2([1, 1]) : void
 >g2 : ([x, y]: [number, number]) => void
->[1, 1] : [number, number]
+>[1, 1] : [1, 1]
 >1 : 1
 >1 : 1
 
@@ -264,7 +264,7 @@ g3();
 g3([1, 1]);
 >g3([1, 1]) : void
 >g3 : ([x, y]?: [number, number]) => void
->[1, 1] : [number, number]
+>[1, 1] : [1, 1]
 >1 : 1
 >1 : 1
 
@@ -284,7 +284,7 @@ g4();
 g4([1, 1]);
 >g4([1, 1]) : void
 >g4 : ([x, y]?: [number, number]) => void
->[1, 1] : [number, number]
+>[1, 1] : [1, 1]
 >1 : 1
 >1 : 1
 
@@ -304,7 +304,7 @@ g5();
 g5([1, 1]);
 >g5([1, 1]) : void
 >g5 : ([x, y]?: [number, number]) => void
->[1, 1] : [number, number]
+>[1, 1] : [1, 1]
 >1 : 1
 >1 : 1
 
diff --git a/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.types b/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.types
index d61bd343c64e6..ab612fd740f0d 100644
--- a/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.types
+++ b/tests/baselines/reference/doNotWidenAtObjectLiteralPropertyAssignment.types
@@ -21,10 +21,10 @@ interface IIntervalTreeNode {
 var test: IIntervalTreeNode[] = [{ interval: { begin: 0 }, children: null }]; // was error here because best common type is {}
 >test : IIntervalTreeNode[]
 >IIntervalTreeNode : IIntervalTreeNode
->[{ interval: { begin: 0 }, children: null }] : { interval: { begin: number; }; children: null; }[]
->{ interval: { begin: 0 }, children: null } : { interval: { begin: number; }; children: null; }
->interval : { begin: number; }
->{ begin: 0 } : { begin: number; }
+>[{ interval: { begin: 0 }, children: null }] : { interval: { begin: 0; }; children: null; }[]
+>{ interval: { begin: 0 }, children: null } : { interval: { begin: 0; }; children: null; }
+>interval : { begin: 0; }
+>{ begin: 0 } : { begin: 0; }
 >begin : number
 >0 : 0
 >children : null
diff --git a/tests/baselines/reference/doubleUnderscoreMappedTypes.types b/tests/baselines/reference/doubleUnderscoreMappedTypes.types
index 6cac09578eef3..42fe30467b53b 100644
--- a/tests/baselines/reference/doubleUnderscoreMappedTypes.types
+++ b/tests/baselines/reference/doubleUnderscoreMappedTypes.types
@@ -13,7 +13,7 @@ interface Properties {
 const ok: Properties = {
 >ok : Properties
 >Properties : Properties
->{    property1: "",    __property2: ""} : { property1: string; __property2: string; }
+>{    property1: "",    __property2: ""} : { property1: ""; __property2: ""; }
 
     property1: "",
 >property1 : string
@@ -45,7 +45,7 @@ const partial: Partial<Properties> = {
 >partial : Partial<Properties>
 >Partial : Partial<T>
 >Properties : Properties
->{    property1: "",    __property2: ""} : { property1: string; __property2: string; }
+>{    property1: "",    __property2: ""} : { property1: ""; __property2: ""; }
 
     property1: "",
 >property1 : string
diff --git a/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES5.types b/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES5.types
index 83637f261dee5..3147b8ef29a44 100644
--- a/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES5.types
+++ b/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES5.types
@@ -5,7 +5,7 @@
 >({ "1": "one", "2": "two" } as { [key: string]: string })[x] : string
 >({ "1": "one", "2": "two" } as { [key: string]: string }) : { [key: string]: string; }
 >{ "1": "one", "2": "two" } as { [key: string]: string } : { [key: string]: string; }
->{ "1": "one", "2": "two" } : { "1": string; "2": string; }
+>{ "1": "one", "2": "two" } : { "1": "one"; "2": "two"; }
 >"one" : "one"
 >"two" : "two"
 >key : string
@@ -17,7 +17,7 @@
 >({ "1": "one", "2": "two" } as { [key: string]: string }).x : string
 >({ "1": "one", "2": "two" } as { [key: string]: string }) : { [key: string]: string; }
 >{ "1": "one", "2": "two" } as { [key: string]: string } : { [key: string]: string; }
->{ "1": "one", "2": "two" } : { "1": string; "2": string; }
+>{ "1": "one", "2": "two" } : { "1": "one"; "2": "two"; }
 >"one" : "one"
 >"two" : "two"
 >key : string
diff --git a/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES6.types b/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES6.types
index f19255cd724eb..fc9d840911d52 100644
--- a/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES6.types
+++ b/tests/baselines/reference/emitAccessExpressionOfCastedObjectLiteralExpressionInArrowFunctionES6.types
@@ -5,7 +5,7 @@
 >({ "1": "one", "2": "two" } as { [key: string]: string })[x] : string
 >({ "1": "one", "2": "two" } as { [key: string]: string }) : { [key: string]: string; }
 >{ "1": "one", "2": "two" } as { [key: string]: string } : { [key: string]: string; }
->{ "1": "one", "2": "two" } : { "1": string; "2": string; }
+>{ "1": "one", "2": "two" } : { "1": "one"; "2": "two"; }
 >"one" : "one"
 >"two" : "two"
 >key : string
@@ -17,7 +17,7 @@
 >({ "1": "one", "2": "two" } as { [key: string]: string }).x : string
 >({ "1": "one", "2": "two" } as { [key: string]: string }) : { [key: string]: string; }
 >{ "1": "one", "2": "two" } as { [key: string]: string } : { [key: string]: string; }
->{ "1": "one", "2": "two" } : { "1": string; "2": string; }
+>{ "1": "one", "2": "two" } : { "1": "one"; "2": "two"; }
 >"one" : "one"
 >"two" : "two"
 >key : string
diff --git a/tests/baselines/reference/emitArrowFunctionES6.types b/tests/baselines/reference/emitArrowFunctionES6.types
index 314d5e464b780..0de200385e76b 100644
--- a/tests/baselines/reference/emitArrowFunctionES6.types
+++ b/tests/baselines/reference/emitArrowFunctionES6.types
@@ -87,12 +87,12 @@ var p8 = ({ a = 1 }) => { };
 >1 : 1
 
 var p9 = ({ a: { b = 1 } = { b: 1 } }) => { };
->p9 : ({ a: { b } }: { a?: { b?: number; }; }) => void
->({ a: { b = 1 } = { b: 1 } }) => { } : ({ a: { b } }: { a?: { b?: number; }; }) => void
+>p9 : ({ a: { b } }: { a?: { b?: 1; }; }) => void
+>({ a: { b = 1 } = { b: 1 } }) => { } : ({ a: { b } }: { a?: { b?: 1; }; }) => void
 >a : any
 >b : number
 >1 : 1
->{ b: 1 } : { b?: number; }
+>{ b: 1 } : { b?: 1; }
 >b : number
 >1 : 1
 
diff --git a/tests/baselines/reference/emitCapturingThisInTupleDestructuring2.types b/tests/baselines/reference/emitCapturingThisInTupleDestructuring2.types
index b27c5ea05bd8f..18e726de1c3f2 100644
--- a/tests/baselines/reference/emitCapturingThisInTupleDestructuring2.types
+++ b/tests/baselines/reference/emitCapturingThisInTupleDestructuring2.types
@@ -1,7 +1,7 @@
 === tests/cases/compiler/emitCapturingThisInTupleDestructuring2.ts ===
 var array1: [number, number] = [1, 2];
 >array1 : [number, number]
->[1, 2] : [number, number]
+>[1, 2] : [1, 2]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/errorMessagesIntersectionTypes01.types b/tests/baselines/reference/errorMessagesIntersectionTypes01.types
index fae285f3c1321..adb7bf4e0b7a9 100644
--- a/tests/baselines/reference/errorMessagesIntersectionTypes01.types
+++ b/tests/baselines/reference/errorMessagesIntersectionTypes01.types
@@ -32,7 +32,7 @@ let fooBar: FooBar = mixBar({
 >FooBar : FooBar
 >mixBar({    fooProp: "frizzlebizzle"}) : { fooProp: string; } & Bar
 >mixBar : <T>(obj: T) => T & Bar
->{    fooProp: "frizzlebizzle"} : { fooProp: string; }
+>{    fooProp: "frizzlebizzle"} : { fooProp: "frizzlebizzle"; }
 
     fooProp: "frizzlebizzle"
 >fooProp : string
diff --git a/tests/baselines/reference/errorMessagesIntersectionTypes02.types b/tests/baselines/reference/errorMessagesIntersectionTypes02.types
index 6c77fd51bdc06..87ebaccf9e5bd 100644
--- a/tests/baselines/reference/errorMessagesIntersectionTypes02.types
+++ b/tests/baselines/reference/errorMessagesIntersectionTypes02.types
@@ -32,7 +32,7 @@ let fooBar: FooBar = mixBar({
 >FooBar : FooBar
 >mixBar({    fooProp: "frizzlebizzle"}) : { fooProp: string; } & Bar
 >mixBar : <T>(obj: T) => T & Bar
->{    fooProp: "frizzlebizzle"} : { fooProp: string; }
+>{    fooProp: "frizzlebizzle"} : { fooProp: "frizzlebizzle"; }
 
     fooProp: "frizzlebizzle"
 >fooProp : string
diff --git a/tests/baselines/reference/escapedIdentifiers.types b/tests/baselines/reference/escapedIdentifiers.types
index ef6c0983d3985..3029b068ca7d0 100644
--- a/tests/baselines/reference/escapedIdentifiers.types
+++ b/tests/baselines/reference/escapedIdentifiers.types
@@ -158,7 +158,7 @@ var interfaceType1Object1 = <interfaceType1>{ bar1: 0 };
 >interfaceType1Object1 : interfaceType1
 ><interfaceType1>{ bar1: 0 } : interfaceType1
 >interfaceType1 : interfaceType1
->{ bar1: 0 } : { bar1: number; }
+>{ bar1: 0 } : { bar1: 0; }
 >bar1 : number
 >0 : 0
 
@@ -173,7 +173,7 @@ var interfaceType1Object2 = <interfaceType\u0031>{ bar1: 0 };
 >interfaceType1Object2 : interfaceType1
 ><interfaceType\u0031>{ bar1: 0 } : interfaceType1
 >interfaceType\u0031 : interfaceType1
->{ bar1: 0 } : { bar1: number; }
+>{ bar1: 0 } : { bar1: 0; }
 >bar1 : number
 >0 : 0
 
@@ -188,7 +188,7 @@ var interfaceType2Object1 = <interfaceType2>{ bar2: 0 };
 >interfaceType2Object1 : interfaceType\u0032
 ><interfaceType2>{ bar2: 0 } : interfaceType\u0032
 >interfaceType2 : interfaceType\u0032
->{ bar2: 0 } : { bar2: number; }
+>{ bar2: 0 } : { bar2: 0; }
 >bar2 : number
 >0 : 0
 
@@ -203,7 +203,7 @@ var interfaceType2Object2 = <interfaceType\u0032>{ bar2: 0 };
 >interfaceType2Object2 : interfaceType\u0032
 ><interfaceType\u0032>{ bar2: 0 } : interfaceType\u0032
 >interfaceType\u0032 : interfaceType\u0032
->{ bar2: 0 } : { bar2: number; }
+>{ bar2: 0 } : { bar2: 0; }
 >bar2 : number
 >0 : 0
 
diff --git a/tests/baselines/reference/everyTypeWithAnnotationAndInitializer.types b/tests/baselines/reference/everyTypeWithAnnotationAndInitializer.types
index d1843aebb1ab0..b5a868e45c4a2 100644
--- a/tests/baselines/reference/everyTypeWithAnnotationAndInitializer.types
+++ b/tests/baselines/reference/everyTypeWithAnnotationAndInitializer.types
@@ -112,7 +112,7 @@ var aGenericClass: D<string> = new D<string>();
 var anObjectLiteral: I = { id: 12 };
 >anObjectLiteral : I
 >I : I
->{ id: 12 } : { id: number; }
+>{ id: 12 } : { id: 12; }
 >id : number
 >12 : 12
 
@@ -135,7 +135,7 @@ var anOtherFunction: (x: string) => number = F;
 var aLambda: typeof F = (x) => 2;
 >aLambda : (x: string) => number
 >F : (x: string) => number
->(x) => 2 : (x: string) => number
+>(x) => 2 : (x: string) => 2
 >x : string
 >2 : 2
 
@@ -158,7 +158,7 @@ var aFunctionInModule: typeof M.F2 = (x) => 'this is a string';
 >M.F2 : (x: number) => string
 >M : typeof M
 >F2 : (x: number) => string
->(x) => 'this is a string' : (x: number) => string
+>(x) => 'this is a string' : (x: number) => "this is a string"
 >x : number
 >'this is a string' : "this is a string"
 
diff --git a/tests/baselines/reference/excessPropertyCheckWithUnions.errors.txt b/tests/baselines/reference/excessPropertyCheckWithUnions.errors.txt
index d802733354e57..eb4a0db668618 100644
--- a/tests/baselines/reference/excessPropertyCheckWithUnions.errors.txt
+++ b/tests/baselines/reference/excessPropertyCheckWithUnions.errors.txt
@@ -5,9 +5,9 @@ tests/cases/compiler/excessPropertyCheckWithUnions.ts(11,21): error TS2322: Type
 tests/cases/compiler/excessPropertyCheckWithUnions.ts(12,1): error TS2322: Type '{ tag: "D"; }' is not assignable to type 'ADT'.
   Type '{ tag: "D"; }' is not assignable to type '{ tag: "D"; d20: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20; }'.
     Property 'd20' is missing in type '{ tag: "D"; }'.
-tests/cases/compiler/excessPropertyCheckWithUnions.ts(33,28): error TS2322: Type '{ tag: "A"; x: string; extra: number; }' is not assignable to type 'Ambiguous'.
+tests/cases/compiler/excessPropertyCheckWithUnions.ts(33,28): error TS2322: Type '{ tag: "A"; x: "hi"; extra: number; }' is not assignable to type 'Ambiguous'.
   Object literal may only specify known properties, and 'extra' does not exist in type 'Ambiguous'.
-tests/cases/compiler/excessPropertyCheckWithUnions.ts(34,26): error TS2322: Type '{ tag: "A"; y: number; extra: number; }' is not assignable to type 'Ambiguous'.
+tests/cases/compiler/excessPropertyCheckWithUnions.ts(34,26): error TS2322: Type '{ tag: "A"; y: 12; extra: number; }' is not assignable to type 'Ambiguous'.
   Object literal may only specify known properties, and 'extra' does not exist in type 'Ambiguous'.
 tests/cases/compiler/excessPropertyCheckWithUnions.ts(39,1): error TS2322: Type '{ tag: "A"; }' is not assignable to type 'Ambiguous'.
   Type '{ tag: "A"; }' is not assignable to type '{ tag: "C"; }'.
@@ -17,9 +17,9 @@ tests/cases/compiler/excessPropertyCheckWithUnions.ts(40,1): error TS2322: Type
   Type '{ tag: "A"; z: true; }' is not assignable to type '{ tag: "C"; }'.
     Types of property 'tag' are incompatible.
       Type '"A"' is not assignable to type '"C"'.
-tests/cases/compiler/excessPropertyCheckWithUnions.ts(49,35): error TS2322: Type '{ a: 1; b: 1; first: string; second: string; }' is not assignable to type 'Overlapping'.
+tests/cases/compiler/excessPropertyCheckWithUnions.ts(49,35): error TS2322: Type '{ a: 1; b: 1; first: "ok"; second: string; }' is not assignable to type 'Overlapping'.
   Object literal may only specify known properties, and 'second' does not exist in type '{ a: 1; b: 1; first: string; }'.
-tests/cases/compiler/excessPropertyCheckWithUnions.ts(50,35): error TS2322: Type '{ a: 1; b: 1; first: string; third: string; }' is not assignable to type 'Overlapping'.
+tests/cases/compiler/excessPropertyCheckWithUnions.ts(50,35): error TS2322: Type '{ a: 1; b: 1; first: "ok"; third: string; }' is not assignable to type 'Overlapping'.
   Object literal may only specify known properties, and 'third' does not exist in type '{ a: 1; b: 1; first: string; }'.
 
 
@@ -68,11 +68,11 @@ tests/cases/compiler/excessPropertyCheckWithUnions.ts(50,35): error TS2322: Type
     // correctly error on excess property 'extra', even when ambiguous
     amb = { tag: "A", x: "hi", extra: 12 }
                                ~~~~~~~~~
-!!! error TS2322: Type '{ tag: "A"; x: string; extra: number; }' is not assignable to type 'Ambiguous'.
+!!! error TS2322: Type '{ tag: "A"; x: "hi"; extra: number; }' is not assignable to type 'Ambiguous'.
 !!! error TS2322:   Object literal may only specify known properties, and 'extra' does not exist in type 'Ambiguous'.
     amb = { tag: "A", y: 12, extra: 12 }
                              ~~~~~~~~~
-!!! error TS2322: Type '{ tag: "A"; y: number; extra: number; }' is not assignable to type 'Ambiguous'.
+!!! error TS2322: Type '{ tag: "A"; y: 12; extra: number; }' is not assignable to type 'Ambiguous'.
 !!! error TS2322:   Object literal may only specify known properties, and 'extra' does not exist in type 'Ambiguous'.
     
     // assignability errors still work.
@@ -100,11 +100,11 @@ tests/cases/compiler/excessPropertyCheckWithUnions.ts(50,35): error TS2322: Type
     // these two are still errors despite their doubled up discriminants
     over = { a: 1, b: 1, first: "ok", second: "error" }
                                       ~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ a: 1; b: 1; first: string; second: string; }' is not assignable to type 'Overlapping'.
+!!! error TS2322: Type '{ a: 1; b: 1; first: "ok"; second: string; }' is not assignable to type 'Overlapping'.
 !!! error TS2322:   Object literal may only specify known properties, and 'second' does not exist in type '{ a: 1; b: 1; first: string; }'.
     over = { a: 1, b: 1, first: "ok", third: "error" }
                                       ~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ a: 1; b: 1; first: string; third: string; }' is not assignable to type 'Overlapping'.
+!!! error TS2322: Type '{ a: 1; b: 1; first: "ok"; third: string; }' is not assignable to type 'Overlapping'.
 !!! error TS2322:   Object literal may only specify known properties, and 'third' does not exist in type '{ a: 1; b: 1; first: string; }'.
     
     // Freshness disappears after spreading a union
diff --git a/tests/baselines/reference/excessPropertyCheckWithUnions.types b/tests/baselines/reference/excessPropertyCheckWithUnions.types
index 212eccbe2ff3b..c1dc08f9774ad 100644
--- a/tests/baselines/reference/excessPropertyCheckWithUnions.types
+++ b/tests/baselines/reference/excessPropertyCheckWithUnions.types
@@ -77,27 +77,27 @@ let amb: Ambiguous
 
 // no error for ambiguous tag, even when it could satisfy both constituents at once
 amb = { tag: "A", x: "hi" }
->amb = { tag: "A", x: "hi" } : { tag: "A"; x: string; }
+>amb = { tag: "A", x: "hi" } : { tag: "A"; x: "hi"; }
 >amb : Ambiguous
->{ tag: "A", x: "hi" } : { tag: "A"; x: string; }
+>{ tag: "A", x: "hi" } : { tag: "A"; x: "hi"; }
 >tag : string
 >"A" : "A"
 >x : string
 >"hi" : "hi"
 
 amb = { tag: "A", y: 12 }
->amb = { tag: "A", y: 12 } : { tag: "A"; y: number; }
+>amb = { tag: "A", y: 12 } : { tag: "A"; y: 12; }
 >amb : Ambiguous
->{ tag: "A", y: 12 } : { tag: "A"; y: number; }
+>{ tag: "A", y: 12 } : { tag: "A"; y: 12; }
 >tag : string
 >"A" : "A"
 >y : number
 >12 : 12
 
 amb = { tag: "A", x: "hi", y: 12 }
->amb = { tag: "A", x: "hi", y: 12 } : { tag: "A"; x: string; y: number; }
+>amb = { tag: "A", x: "hi", y: 12 } : { tag: "A"; x: "hi"; y: 12; }
 >amb : Ambiguous
->{ tag: "A", x: "hi", y: 12 } : { tag: "A"; x: string; y: number; }
+>{ tag: "A", x: "hi", y: 12 } : { tag: "A"; x: "hi"; y: 12; }
 >tag : string
 >"A" : "A"
 >x : string
@@ -107,9 +107,9 @@ amb = { tag: "A", x: "hi", y: 12 }
 
 // correctly error on excess property 'extra', even when ambiguous
 amb = { tag: "A", x: "hi", extra: 12 }
->amb = { tag: "A", x: "hi", extra: 12 } : { tag: "A"; x: string; extra: number; }
+>amb = { tag: "A", x: "hi", extra: 12 } : { tag: "A"; x: "hi"; extra: number; }
 >amb : Ambiguous
->{ tag: "A", x: "hi", extra: 12 } : { tag: "A"; x: string; extra: number; }
+>{ tag: "A", x: "hi", extra: 12 } : { tag: "A"; x: "hi"; extra: number; }
 >tag : string
 >"A" : "A"
 >x : string
@@ -118,9 +118,9 @@ amb = { tag: "A", x: "hi", extra: 12 }
 >12 : 12
 
 amb = { tag: "A", y: 12, extra: 12 }
->amb = { tag: "A", y: 12, extra: 12 } : { tag: "A"; y: number; extra: number; }
+>amb = { tag: "A", y: 12, extra: 12 } : { tag: "A"; y: 12; extra: number; }
 >amb : Ambiguous
->{ tag: "A", y: 12, extra: 12 } : { tag: "A"; y: number; extra: number; }
+>{ tag: "A", y: 12, extra: 12 } : { tag: "A"; y: 12; extra: number; }
 >tag : string
 >"A" : "A"
 >y : number
@@ -169,9 +169,9 @@ let over: Overlapping
 
 // these two are still errors despite their doubled up discriminants
 over = { a: 1, b: 1, first: "ok", second: "error" }
->over = { a: 1, b: 1, first: "ok", second: "error" } : { a: 1; b: 1; first: string; second: string; }
+>over = { a: 1, b: 1, first: "ok", second: "error" } : { a: 1; b: 1; first: "ok"; second: string; }
 >over : Overlapping
->{ a: 1, b: 1, first: "ok", second: "error" } : { a: 1; b: 1; first: string; second: string; }
+>{ a: 1, b: 1, first: "ok", second: "error" } : { a: 1; b: 1; first: "ok"; second: string; }
 >a : number
 >1 : 1
 >b : number
@@ -182,9 +182,9 @@ over = { a: 1, b: 1, first: "ok", second: "error" }
 >"error" : "error"
 
 over = { a: 1, b: 1, first: "ok", third: "error" }
->over = { a: 1, b: 1, first: "ok", third: "error" } : { a: 1; b: 1; first: string; third: string; }
+>over = { a: 1, b: 1, first: "ok", third: "error" } : { a: 1; b: 1; first: "ok"; third: string; }
 >over : Overlapping
->{ a: 1, b: 1, first: "ok", third: "error" } : { a: 1; b: 1; first: string; third: string; }
+>{ a: 1, b: 1, first: "ok", third: "error" } : { a: 1; b: 1; first: "ok"; third: string; }
 >a : number
 >1 : 1
 >b : number
diff --git a/tests/baselines/reference/excessPropertyErrorForFunctionTypes.errors.txt b/tests/baselines/reference/excessPropertyErrorForFunctionTypes.errors.txt
index 961308059bac7..d88bd3e58615a 100644
--- a/tests/baselines/reference/excessPropertyErrorForFunctionTypes.errors.txt
+++ b/tests/baselines/reference/excessPropertyErrorForFunctionTypes.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/excessPropertyErrorForFunctionTypes.ts(4,44): error TS2322: Type '{ a: number; c: number; d: number; }' is not assignable to type 'DoesntWork'.
+tests/cases/compiler/excessPropertyErrorForFunctionTypes.ts(4,44): error TS2322: Type '{ a: 1; c: 2; d: number; }' is not assignable to type 'DoesntWork'.
   Object literal may only specify known properties, and 'd' does not exist in type 'DoesntWork'.
 
 
@@ -8,5 +8,5 @@ tests/cases/compiler/excessPropertyErrorForFunctionTypes.ts(4,44): error TS2322:
     
     let doesntWork: DoesntWork = { a: 1, c: 2, d: 3 }
                                                ~~~~
-!!! error TS2322: Type '{ a: number; c: number; d: number; }' is not assignable to type 'DoesntWork'.
+!!! error TS2322: Type '{ a: 1; c: 2; d: number; }' is not assignable to type 'DoesntWork'.
 !!! error TS2322:   Object literal may only specify known properties, and 'd' does not exist in type 'DoesntWork'.
\ No newline at end of file
diff --git a/tests/baselines/reference/excessPropertyErrorForFunctionTypes.types b/tests/baselines/reference/excessPropertyErrorForFunctionTypes.types
index e17b0e2ec4c9c..7b665900375ac 100644
--- a/tests/baselines/reference/excessPropertyErrorForFunctionTypes.types
+++ b/tests/baselines/reference/excessPropertyErrorForFunctionTypes.types
@@ -11,7 +11,7 @@ type DoesntWork = { a: number, c: number } | FunctionType;
 let doesntWork: DoesntWork = { a: 1, c: 2, d: 3 }
 >doesntWork : DoesntWork
 >DoesntWork : DoesntWork
->{ a: 1, c: 2, d: 3 } : { a: number; c: number; d: number; }
+>{ a: 1, c: 2, d: 3 } : { a: 1; c: 2; d: number; }
 >a : number
 >1 : 1
 >c : number
diff --git a/tests/baselines/reference/excessPropertyErrorsSuppressed.types b/tests/baselines/reference/excessPropertyErrorsSuppressed.types
index e1288e969c109..153390f428995 100644
--- a/tests/baselines/reference/excessPropertyErrorsSuppressed.types
+++ b/tests/baselines/reference/excessPropertyErrorsSuppressed.types
@@ -2,7 +2,7 @@
 var x: { a: string } = { a: "hello", b: 42 };  // No error
 >x : { a: string; }
 >a : string
->{ a: "hello", b: 42 } : { a: string; b: number; }
+>{ a: "hello", b: 42 } : { a: "hello"; b: number; }
 >a : string
 >"hello" : "hello"
 >b : number
diff --git a/tests/baselines/reference/exportAssignmentConstrainedGenericType.types b/tests/baselines/reference/exportAssignmentConstrainedGenericType.types
index a8710711e6489..27caf80b0724f 100644
--- a/tests/baselines/reference/exportAssignmentConstrainedGenericType.types
+++ b/tests/baselines/reference/exportAssignmentConstrainedGenericType.types
@@ -9,10 +9,10 @@ var x = new foo(true); // Should error
 >true : true
 
 var y = new foo({a: "test", b: 42}); // Should be OK
->y : foo<{ a: string; b: number; }>
->new foo({a: "test", b: 42}) : foo<{ a: string; b: number; }>
+>y : foo<{ a: "test"; b: 42; }>
+>new foo({a: "test", b: 42}) : foo<{ a: "test"; b: 42; }>
 >foo : typeof foo
->{a: "test", b: 42} : { a: string; b: number; }
+>{a: "test", b: 42} : { a: "test"; b: 42; }
 >a : string
 >"test" : "test"
 >b : number
@@ -20,11 +20,11 @@ var y = new foo({a: "test", b: 42}); // Should be OK
 
 var z: number = y.test.b;
 >z : number
->y.test.b : number
->y.test : { a: string; b: number; }
->y : foo<{ a: string; b: number; }>
->test : { a: string; b: number; }
->b : number
+>y.test.b : 42
+>y.test : { a: "test"; b: 42; }
+>y : foo<{ a: "test"; b: 42; }>
+>test : { a: "test"; b: 42; }
+>b : 42
 
 === tests/cases/conformance/externalModules/foo_0.ts ===
 class Foo<T extends {a: string; b:number;}>{
diff --git a/tests/baselines/reference/exportImportNonInstantiatedModule.types b/tests/baselines/reference/exportImportNonInstantiatedModule.types
index d43cd69dac703..ae6e873bdbe73 100644
--- a/tests/baselines/reference/exportImportNonInstantiatedModule.types
+++ b/tests/baselines/reference/exportImportNonInstantiatedModule.types
@@ -21,7 +21,7 @@ var x: B.A1.I = { x: 1 };
 >B : any
 >A1 : any
 >I : A.I
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/exportImportNonInstantiatedModule2.types b/tests/baselines/reference/exportImportNonInstantiatedModule2.types
index 9c01926526fde..882ef49bdffb9 100644
--- a/tests/baselines/reference/exportImportNonInstantiatedModule2.types
+++ b/tests/baselines/reference/exportImportNonInstantiatedModule2.types
@@ -8,7 +8,7 @@ export function w(): e.w { // Should be OK
 >w : e.w
 
     return {name: 'value' };
->{name: 'value' } : { name: string; }
+>{name: 'value' } : { name: "value"; }
 >name : string
 >'value' : "value"
 }
diff --git a/tests/baselines/reference/exportNonVisibleType.types b/tests/baselines/reference/exportNonVisibleType.types
index 2bb65cf05f06f..edee13a66bf7c 100644
--- a/tests/baselines/reference/exportNonVisibleType.types
+++ b/tests/baselines/reference/exportNonVisibleType.types
@@ -12,7 +12,7 @@ interface I1 {
 var x: I1 = {a: "test", b: 42};
 >x : I1
 >I1 : I1
->{a: "test", b: 42} : { a: string; b: number; }
+>{a: "test", b: 42} : { a: "test"; b: 42; }
 >a : string
 >"test" : "test"
 >b : number
diff --git a/tests/baselines/reference/fallbackToBindingPatternForTypeInference.types b/tests/baselines/reference/fallbackToBindingPatternForTypeInference.types
index 161870de77c16..221a8fe3b04e9 100644
--- a/tests/baselines/reference/fallbackToBindingPatternForTypeInference.types
+++ b/tests/baselines/reference/fallbackToBindingPatternForTypeInference.types
@@ -16,7 +16,7 @@ trans(({a}) => a);
 trans(([b,c]) => 'foo');
 >trans(([b,c]) => 'foo') : number
 >trans : <T>(f: (x: T) => string) => number
->([b,c]) => 'foo' : ([b, c]: [any, any]) => string
+>([b,c]) => 'foo' : ([b, c]: [any, any]) => "foo"
 >b : any
 >c : any
 >'foo' : "foo"
@@ -24,7 +24,7 @@ trans(([b,c]) => 'foo');
 trans(({d: [e,f]}) => 'foo');
 >trans(({d: [e,f]}) => 'foo') : number
 >trans : <T>(f: (x: T) => string) => number
->({d: [e,f]}) => 'foo' : ({ d: [e, f] }: { d: [any, any]; }) => string
+>({d: [e,f]}) => 'foo' : ({ d: [e, f] }: { d: [any, any]; }) => "foo"
 >d : any
 >e : any
 >f : any
@@ -33,7 +33,7 @@ trans(({d: [e,f]}) => 'foo');
 trans(([{g},{h}]) => 'foo');
 >trans(([{g},{h}]) => 'foo') : number
 >trans : <T>(f: (x: T) => string) => number
->([{g},{h}]) => 'foo' : ([{ g }, { h }]: [{ g: any; }, { h: any; }]) => string
+>([{g},{h}]) => 'foo' : ([{ g }, { h }]: [{ g: any; }, { h: any; }]) => "foo"
 >g : any
 >h : any
 >'foo' : "foo"
diff --git a/tests/baselines/reference/for-of36.types b/tests/baselines/reference/for-of36.types
index 1448c212371c5..7a2ec9d413ccc 100644
--- a/tests/baselines/reference/for-of36.types
+++ b/tests/baselines/reference/for-of36.types
@@ -1,7 +1,7 @@
 === tests/cases/conformance/es6/for-ofStatements/for-of36.ts ===
 var tuple: [string, boolean] = ["", true];
 >tuple : [string, boolean]
->["", true] : [string, true]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of37.types b/tests/baselines/reference/for-of37.types
index 1168921596e11..bd3262d85db77 100644
--- a/tests/baselines/reference/for-of37.types
+++ b/tests/baselines/reference/for-of37.types
@@ -3,8 +3,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of38.types b/tests/baselines/reference/for-of38.types
index e2201d24394f1..84e83c271a842 100644
--- a/tests/baselines/reference/for-of38.types
+++ b/tests/baselines/reference/for-of38.types
@@ -3,8 +3,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of39.errors.txt b/tests/baselines/reference/for-of39.errors.txt
index 73802daf5a54e..e98bdd58a2f01 100644
--- a/tests/baselines/reference/for-of39.errors.txt
+++ b/tests/baselines/reference/for-of39.errors.txt
@@ -1,28 +1,28 @@
-tests/cases/conformance/es6/for-ofStatements/for-of39.ts(1,19): error TS2345: Argument of type '([string, true] | [string, 0])[]' is not assignable to parameter of type 'Iterable<[string, boolean]>'.
+tests/cases/conformance/es6/for-ofStatements/for-of39.ts(1,19): error TS2345: Argument of type '(["", true] | ["", number])[]' is not assignable to parameter of type 'Iterable<[string, boolean]>'.
   Types of property '[Symbol.iterator]' are incompatible.
-    Type '() => IterableIterator<[string, true] | [string, 0]>' is not assignable to type '() => Iterator<[string, boolean]>'.
-      Type 'IterableIterator<[string, true] | [string, 0]>' is not assignable to type 'Iterator<[string, boolean]>'.
+    Type '() => IterableIterator<["", true] | ["", number]>' is not assignable to type '() => Iterator<[string, boolean]>'.
+      Type 'IterableIterator<["", true] | ["", number]>' is not assignable to type 'Iterator<[string, boolean]>'.
         Types of property 'next' are incompatible.
-          Type '(value?: any) => IteratorResult<[string, true] | [string, 0]>' is not assignable to type '(value?: any) => IteratorResult<[string, boolean]>'.
-            Type 'IteratorResult<[string, true] | [string, 0]>' is not assignable to type 'IteratorResult<[string, boolean]>'.
-              Type '[string, true] | [string, 0]' is not assignable to type '[string, boolean]'.
-                Type '[string, 0]' is not assignable to type '[string, boolean]'.
-                  Type '0' is not assignable to type 'boolean'.
+          Type '(value?: any) => IteratorResult<["", true] | ["", number]>' is not assignable to type '(value?: any) => IteratorResult<[string, boolean]>'.
+            Type 'IteratorResult<["", true] | ["", number]>' is not assignable to type 'IteratorResult<[string, boolean]>'.
+              Type '["", true] | ["", number]' is not assignable to type '[string, boolean]'.
+                Type '["", number]' is not assignable to type '[string, boolean]'.
+                  Type 'number' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/conformance/es6/for-ofStatements/for-of39.ts (1 errors) ====
     var map = new Map([["", true], ["", 0]]);
                       ~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '([string, true] | [string, 0])[]' is not assignable to parameter of type 'Iterable<[string, boolean]>'.
+!!! error TS2345: Argument of type '(["", true] | ["", number])[]' is not assignable to parameter of type 'Iterable<[string, boolean]>'.
 !!! error TS2345:   Types of property '[Symbol.iterator]' are incompatible.
-!!! error TS2345:     Type '() => IterableIterator<[string, true] | [string, 0]>' is not assignable to type '() => Iterator<[string, boolean]>'.
-!!! error TS2345:       Type 'IterableIterator<[string, true] | [string, 0]>' is not assignable to type 'Iterator<[string, boolean]>'.
+!!! error TS2345:     Type '() => IterableIterator<["", true] | ["", number]>' is not assignable to type '() => Iterator<[string, boolean]>'.
+!!! error TS2345:       Type 'IterableIterator<["", true] | ["", number]>' is not assignable to type 'Iterator<[string, boolean]>'.
 !!! error TS2345:         Types of property 'next' are incompatible.
-!!! error TS2345:           Type '(value?: any) => IteratorResult<[string, true] | [string, 0]>' is not assignable to type '(value?: any) => IteratorResult<[string, boolean]>'.
-!!! error TS2345:             Type 'IteratorResult<[string, true] | [string, 0]>' is not assignable to type 'IteratorResult<[string, boolean]>'.
-!!! error TS2345:               Type '[string, true] | [string, 0]' is not assignable to type '[string, boolean]'.
-!!! error TS2345:                 Type '[string, 0]' is not assignable to type '[string, boolean]'.
-!!! error TS2345:                   Type '0' is not assignable to type 'boolean'.
+!!! error TS2345:           Type '(value?: any) => IteratorResult<["", true] | ["", number]>' is not assignable to type '(value?: any) => IteratorResult<[string, boolean]>'.
+!!! error TS2345:             Type 'IteratorResult<["", true] | ["", number]>' is not assignable to type 'IteratorResult<[string, boolean]>'.
+!!! error TS2345:               Type '["", true] | ["", number]' is not assignable to type '[string, boolean]'.
+!!! error TS2345:                 Type '["", number]' is not assignable to type '[string, boolean]'.
+!!! error TS2345:                   Type 'number' is not assignable to type 'boolean'.
     for (var [k, v] of map) {
         k;
         v;
diff --git a/tests/baselines/reference/for-of40.types b/tests/baselines/reference/for-of40.types
index 4c690ed9ce748..8eb60a652aa71 100644
--- a/tests/baselines/reference/for-of40.types
+++ b/tests/baselines/reference/for-of40.types
@@ -3,8 +3,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of43.types b/tests/baselines/reference/for-of43.types
index 2327f1bafedde..48466611d20b6 100644
--- a/tests/baselines/reference/for-of43.types
+++ b/tests/baselines/reference/for-of43.types
@@ -13,7 +13,7 @@ for (var {x: a = "", y: b = true} of array) {
 >a : string
 >"" : ""
 >y : any
->b : number | true
+>b : number | boolean
 >true : true
 >array : { x: string; y: number; }[]
 
diff --git a/tests/baselines/reference/for-of44.types b/tests/baselines/reference/for-of44.types
index 42da734edb97e..5e0f9d76eca03 100644
--- a/tests/baselines/reference/for-of44.types
+++ b/tests/baselines/reference/for-of44.types
@@ -1,14 +1,14 @@
 === tests/cases/conformance/es6/for-ofStatements/for-of44.ts ===
 var array: [number, string | boolean | symbol][] = [[0, ""], [0, true], [1, Symbol()]]
 >array : [number, string | boolean | symbol][]
->[[0, ""], [0, true], [1, Symbol()]] : ([number, ""] | [number, true] | [number, symbol])[]
->[0, ""] : [number, ""]
+>[[0, ""], [0, true], [1, Symbol()]] : ([0, ""] | [0, true] | [1, symbol])[]
+>[0, ""] : [0, ""]
 >0 : 0
 >"" : ""
->[0, true] : [number, true]
+>[0, true] : [0, true]
 >0 : 0
 >true : true
->[1, Symbol()] : [number, symbol]
+>[1, Symbol()] : [1, symbol]
 >1 : 1
 >Symbol() : symbol
 >Symbol : SymbolConstructor
diff --git a/tests/baselines/reference/for-of45.types b/tests/baselines/reference/for-of45.types
index 6e6a0a11bf425..286ae29a6226e 100644
--- a/tests/baselines/reference/for-of45.types
+++ b/tests/baselines/reference/for-of45.types
@@ -7,8 +7,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of46.types b/tests/baselines/reference/for-of46.types
index 73a91f63b66da..089ade8403e75 100644
--- a/tests/baselines/reference/for-of46.types
+++ b/tests/baselines/reference/for-of46.types
@@ -7,8 +7,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of49.types b/tests/baselines/reference/for-of49.types
index bed54d205ea36..739c274a594a1 100644
--- a/tests/baselines/reference/for-of49.types
+++ b/tests/baselines/reference/for-of49.types
@@ -7,8 +7,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/for-of50.types b/tests/baselines/reference/for-of50.types
index 8da0666571106..ad44388923761 100644
--- a/tests/baselines/reference/for-of50.types
+++ b/tests/baselines/reference/for-of50.types
@@ -3,8 +3,8 @@ var map = new Map([["", true]]);
 >map : Map<string, boolean>
 >new Map([["", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true]] : ["", true][]
+>["", true] : ["", true]
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/forStatements.types b/tests/baselines/reference/forStatements.types
index 7c467d31847e7..e3bcbb4e5e4b3 100644
--- a/tests/baselines/reference/forStatements.types
+++ b/tests/baselines/reference/forStatements.types
@@ -112,7 +112,7 @@ for(var aGenericClass: D<string> = new D<string>();;){}
 for(var anObjectLiteral: I = { id: 12 };;){}
 >anObjectLiteral : I
 >I : I
->{ id: 12 } : { id: number; }
+>{ id: 12 } : { id: 12; }
 >id : number
 >12 : 12
 
@@ -135,7 +135,7 @@ for(var anOtherFunction: (x: string) => number = F;;){}
 for(var aLambda: typeof F = (x) => 2;;){}
 >aLambda : (x: string) => number
 >F : (x: string) => number
->(x) => 2 : (x: string) => number
+>(x) => 2 : (x: string) => 2
 >x : string
 >2 : 2
 
@@ -158,7 +158,7 @@ for(var aFunctionInModule: typeof M.F2 = (x) => 'this is a string';;){}
 >M.F2 : (x: number) => string
 >M : typeof M
 >F2 : (x: number) => string
->(x) => 'this is a string' : (x: number) => string
+>(x) => 'this is a string' : (x: number) => "this is a string"
 >x : number
 >'this is a string' : "this is a string"
 
diff --git a/tests/baselines/reference/forStatementsMultipleValidDecl.types b/tests/baselines/reference/forStatementsMultipleValidDecl.types
index d0950d67924f1..405c2ed309e0b 100644
--- a/tests/baselines/reference/forStatementsMultipleValidDecl.types
+++ b/tests/baselines/reference/forStatementsMultipleValidDecl.types
@@ -41,7 +41,7 @@ for (var p = { x: 1, y: 2 }; ;) { }
 for (var p: Point = { x: 0, y: undefined }; ;) { }
 >p : Point
 >Point : Point
->{ x: 0, y: undefined } : { x: number; y: undefined; }
+>{ x: 0, y: undefined } : { x: 0; y: undefined; }
 >x : number
 >0 : 0
 >y : undefined
@@ -60,7 +60,7 @@ for (var p: { x: number; y: number; } = { x: 1, y: 2 }; ;) { }
 >p : Point
 >x : number
 >y : number
->{ x: 1, y: 2 } : { x: number; y: number; }
+>{ x: 1, y: 2 } : { x: 1; y: 2; }
 >x : number
 >1 : 1
 >y : number
@@ -71,7 +71,7 @@ for (var p = <{ x: number; y: number; }>{ x: 0, y: undefined }; ;) { }
 ><{ x: number; y: number; }>{ x: 0, y: undefined } : { x: number; y: number; }
 >x : number
 >y : number
->{ x: 0, y: undefined } : { x: number; y: undefined; }
+>{ x: 0, y: undefined } : { x: 0; y: undefined; }
 >x : number
 >0 : 0
 >y : undefined
diff --git a/tests/baselines/reference/functionAssignment.types b/tests/baselines/reference/functionAssignment.types
index ff2f0a3583a98..4a9abe8e897af 100644
--- a/tests/baselines/reference/functionAssignment.types
+++ b/tests/baselines/reference/functionAssignment.types
@@ -82,7 +82,7 @@ function f3(a: { a: number; b: number; }) { }
 f3({ a: 0, b: 0 });
 >f3({ a: 0, b: 0 }) : void
 >f3 : (a: { a: number; b: number; }) => void
->{ a: 0, b: 0 } : { a: number; b: number; }
+>{ a: 0, b: 0 } : { a: 0; b: 0; }
 >a : number
 >0 : 0
 >b : number
diff --git a/tests/baselines/reference/functionAssignmentError.types b/tests/baselines/reference/functionAssignmentError.types
index 3223a7b40f84e..189b6eddf2df2 100644
--- a/tests/baselines/reference/functionAssignmentError.types
+++ b/tests/baselines/reference/functionAssignmentError.types
@@ -5,8 +5,8 @@ var func = function (){return "ONE";};
 >"ONE" : "ONE"
 
 func = function (){return "ONE";};
->func = function (){return "ONE";} : () => string
+>func = function (){return "ONE";} : () => "ONE"
 >func : () => string
->function (){return "ONE";} : () => string
+>function (){return "ONE";} : () => "ONE"
 >"ONE" : "ONE"
 
diff --git a/tests/baselines/reference/functionExpressionContextualTyping1.types b/tests/baselines/reference/functionExpressionContextualTyping1.types
index 58265c74aa29e..e9e6ad66a6d77 100644
--- a/tests/baselines/reference/functionExpressionContextualTyping1.types
+++ b/tests/baselines/reference/functionExpressionContextualTyping1.types
@@ -14,7 +14,7 @@ var a0: (n: number, s: string) => number = (num, str) => {
 >a0 : (n: number, s: string) => number
 >n : number
 >s : string
->(num, str) => {    num.toExponential();    return 0;} : (num: number, str: string) => number
+>(num, str) => {    num.toExponential();    return 0;} : (num: number, str: string) => 0
 >num : number
 >str : string
 
@@ -41,7 +41,7 @@ var a1: (c: Class<Number>) => number = (a1) => {
 >c : Class<Number>
 >Class : Class<T>
 >Number : Number
->(a1) => {    a1.foo();    return 1;} : (a1: Class<Number>) => number
+>(a1) => {    a1.foo();    return 1;} : (a1: Class<Number>) => 1
 >a1 : Class<Number>
 
     a1.foo();
@@ -90,9 +90,9 @@ b2 = (foo, bar) => { return foo + 1; }
 >1 : 1
 
 b2 = (foo, bar) => { return "hello"; }
->b2 = (foo, bar) => { return "hello"; } : (foo: number, bar: string) => string
+>b2 = (foo, bar) => { return "hello"; } : (foo: number, bar: string) => "hello"
 >b2 : ((n: number, s: string) => number) | ((n: number, s: string) => string)
->(foo, bar) => { return "hello"; } : (foo: number, bar: string) => string
+>(foo, bar) => { return "hello"; } : (foo: number, bar: string) => "hello"
 >foo : number
 >bar : string
 >"hello" : "hello"
@@ -114,7 +114,7 @@ var b4: (n: E) => string = (number = 1) => { return "hello"; };
 >b4 : (n: E) => string
 >n : E
 >E : E
->(number = 1) => { return "hello"; } : (number?: E) => string
+>(number = 1) => { return "hello"; } : (number?: E) => "hello"
 >number : E
 >1 : 1
 >"hello" : "hello"
@@ -122,7 +122,7 @@ var b4: (n: E) => string = (number = 1) => { return "hello"; };
 var b5: (n: {}) => string = (number = "string") => { return "hello"; };
 >b5 : (n: {}) => string
 >n : {}
->(number = "string") => { return "hello"; } : (number?: {}) => string
+>(number = "string") => { return "hello"; } : (number?: {}) => "hello"
 >number : {}
 >"string" : "string"
 >"hello" : "hello"
diff --git a/tests/baselines/reference/functionOverloads17.types b/tests/baselines/reference/functionOverloads17.types
index a93973cf3acaa..4b65a6a2a37d1 100644
--- a/tests/baselines/reference/functionOverloads17.types
+++ b/tests/baselines/reference/functionOverloads17.types
@@ -6,7 +6,7 @@ function foo():{a:number;}
 function foo():{a:string;} { return {a:""} }
 >foo : () => { a: number; }
 >a : string
->{a:""} : { a: string; }
+>{a:""} : { a: ""; }
 >a : string
 >"" : ""
 
diff --git a/tests/baselines/reference/functionOverloads35.types b/tests/baselines/reference/functionOverloads35.types
index 8686bc2fdf895..b7059575747d9 100644
--- a/tests/baselines/reference/functionOverloads35.types
+++ b/tests/baselines/reference/functionOverloads35.types
@@ -19,7 +19,7 @@ var x = foo({a:1});
 >x : number
 >foo({a:1}) : number
 >foo : { (bar: { a: number; }): number; (bar: { a: string; }): string; }
->{a:1} : { a: number; }
+>{a:1} : { a: 1; }
 >a : number
 >1 : 1
 
diff --git a/tests/baselines/reference/functionOverloads36.types b/tests/baselines/reference/functionOverloads36.types
index 8a78f466d349a..c948f792a8705 100644
--- a/tests/baselines/reference/functionOverloads36.types
+++ b/tests/baselines/reference/functionOverloads36.types
@@ -19,7 +19,7 @@ var x = foo({a:'foo'});
 >x : string
 >foo({a:'foo'}) : string
 >foo : { (bar: { a: number; }): number; (bar: { a: string; }): string; }
->{a:'foo'} : { a: string; }
+>{a:'foo'} : { a: "foo"; }
 >a : string
 >'foo' : "foo"
 
diff --git a/tests/baselines/reference/functionOverloads38.types b/tests/baselines/reference/functionOverloads38.types
index e8b32f78e7c3a..ca6a731c3d480 100644
--- a/tests/baselines/reference/functionOverloads38.types
+++ b/tests/baselines/reference/functionOverloads38.types
@@ -19,8 +19,8 @@ var x = foo([{a:1}]);
 >x : string
 >foo([{a:1}]) : string
 >foo : { (bar: { a: number; }[]): string; (bar: { a: boolean; }[]): number; }
->[{a:1}] : { a: number; }[]
->{a:1} : { a: number; }
+>[{a:1}] : { a: 1; }[]
+>{a:1} : { a: 1; }
 >a : number
 >1 : 1
 
diff --git a/tests/baselines/reference/functionOverloads40.errors.txt b/tests/baselines/reference/functionOverloads40.errors.txt
index d871946cde246..f965a4eb9e129 100644
--- a/tests/baselines/reference/functionOverloads40.errors.txt
+++ b/tests/baselines/reference/functionOverloads40.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/compiler/functionOverloads40.ts(4,13): error TS2345: Argument of type '{ a: "bar"; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
-  Type '{ a: "bar"; }' is not assignable to type '{ a: boolean; }'.
+tests/cases/compiler/functionOverloads40.ts(4,13): error TS2345: Argument of type '{ a: string; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
+  Type '{ a: string; }' is not assignable to type '{ a: boolean; }'.
     Types of property 'a' are incompatible.
-      Type '"bar"' is not assignable to type 'boolean'.
+      Type 'string' is not assignable to type 'boolean'.
 
 
 ==== tests/cases/compiler/functionOverloads40.ts (1 errors) ====
@@ -10,8 +10,8 @@ tests/cases/compiler/functionOverloads40.ts(4,13): error TS2345: Argument of typ
     function foo(bar:{a:any;}[]):any{ return bar }
     var x = foo([{a:'bar'}]);
                 ~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ a: "bar"; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
-!!! error TS2345:   Type '{ a: "bar"; }' is not assignable to type '{ a: boolean; }'.
+!!! error TS2345: Argument of type '{ a: string; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
+!!! error TS2345:   Type '{ a: string; }' is not assignable to type '{ a: boolean; }'.
 !!! error TS2345:     Types of property 'a' are incompatible.
-!!! error TS2345:       Type '"bar"' is not assignable to type 'boolean'.
+!!! error TS2345:       Type 'string' is not assignable to type 'boolean'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/functionOverloads43.types b/tests/baselines/reference/functionOverloads43.types
index 41a29fd0fe3a1..32a890ac1090f 100644
--- a/tests/baselines/reference/functionOverloads43.types
+++ b/tests/baselines/reference/functionOverloads43.types
@@ -31,8 +31,8 @@ var x = foo([{a: "str"}]);
 >x : string
 >foo([{a: "str"}]) : string
 >foo : { (bar: { a: number; }[]): number; (bar: { a: string; }[]): string; }
->[{a: "str"}] : { a: string; }[]
->{a: "str"} : { a: string; }
+>[{a: "str"}] : { a: "str"; }[]
+>{a: "str"} : { a: "str"; }
 >a : string
 >"str" : "str"
 
@@ -40,8 +40,8 @@ var y = foo([{a: 100}]);
 >y : number
 >foo([{a: 100}]) : number
 >foo : { (bar: { a: number; }[]): number; (bar: { a: string; }[]): string; }
->[{a: 100}] : { a: number; }[]
->{a: 100} : { a: number; }
+>[{a: 100}] : { a: 100; }[]
+>{a: 100} : { a: 100; }
 >a : number
 >100 : 100
 
diff --git a/tests/baselines/reference/functionOverloads44.types b/tests/baselines/reference/functionOverloads44.types
index af046ba72067d..278ae79df3d62 100644
--- a/tests/baselines/reference/functionOverloads44.types
+++ b/tests/baselines/reference/functionOverloads44.types
@@ -63,8 +63,8 @@ var x1 = foo1([{a: "str"}]);
 >x1 : Animal
 >foo1([{a: "str"}]) : Animal
 >foo1 : { (bar: { a: number; }[]): Dog; (bar: { a: string; }[]): Animal; }
->[{a: "str"}] : { a: string; }[]
->{a: "str"} : { a: string; }
+>[{a: "str"}] : { a: "str"; }[]
+>{a: "str"} : { a: "str"; }
 >a : string
 >"str" : "str"
 
@@ -72,8 +72,8 @@ var y1 = foo1([{a: 100}]);
 >y1 : Dog
 >foo1([{a: 100}]) : Dog
 >foo1 : { (bar: { a: number; }[]): Dog; (bar: { a: string; }[]): Animal; }
->[{a: 100}] : { a: number; }[]
->{a: 100} : { a: number; }
+>[{a: 100}] : { a: 100; }[]
+>{a: 100} : { a: 100; }
 >a : number
 >100 : 100
 
@@ -81,8 +81,8 @@ var x2 = foo2([{a: "str"}]);
 >x2 : Dog | Cat
 >foo2([{a: "str"}]) : Dog | Cat
 >foo2 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog | Cat; }
->[{a: "str"}] : { a: string; }[]
->{a: "str"} : { a: string; }
+>[{a: "str"}] : { a: "str"; }[]
+>{a: "str"} : { a: "str"; }
 >a : string
 >"str" : "str"
 
@@ -90,8 +90,8 @@ var y2 = foo2([{a: 100}]);
 >y2 : Cat
 >foo2([{a: 100}]) : Cat
 >foo2 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog | Cat; }
->[{a: 100}] : { a: number; }[]
->{a: 100} : { a: number; }
+>[{a: 100}] : { a: 100; }[]
+>{a: 100} : { a: 100; }
 >a : number
 >100 : 100
 
diff --git a/tests/baselines/reference/functionOverloads45.types b/tests/baselines/reference/functionOverloads45.types
index ca778e68056b1..8340f81e3d552 100644
--- a/tests/baselines/reference/functionOverloads45.types
+++ b/tests/baselines/reference/functionOverloads45.types
@@ -63,8 +63,8 @@ var x1 = foo1([{a: "str"}]);
 >x1 : Dog
 >foo1([{a: "str"}]) : Dog
 >foo1 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog; }
->[{a: "str"}] : { a: string; }[]
->{a: "str"} : { a: string; }
+>[{a: "str"}] : { a: "str"; }[]
+>{a: "str"} : { a: "str"; }
 >a : string
 >"str" : "str"
 
@@ -72,8 +72,8 @@ var y1 = foo1([{a: 100}]);
 >y1 : Cat
 >foo1([{a: 100}]) : Cat
 >foo1 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog; }
->[{a: 100}] : { a: number; }[]
->{a: 100} : { a: number; }
+>[{a: 100}] : { a: 100; }[]
+>{a: 100} : { a: 100; }
 >a : number
 >100 : 100
 
@@ -81,8 +81,8 @@ var x2 = foo2([{a: "str"}]);
 >x2 : Dog
 >foo2([{a: "str"}]) : Dog
 >foo2 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog; }
->[{a: "str"}] : { a: string; }[]
->{a: "str"} : { a: string; }
+>[{a: "str"}] : { a: "str"; }[]
+>{a: "str"} : { a: "str"; }
 >a : string
 >"str" : "str"
 
@@ -90,8 +90,8 @@ var y2 = foo2([{a: 100}]);
 >y2 : Cat
 >foo2([{a: 100}]) : Cat
 >foo2 : { (bar: { a: number; }[]): Cat; (bar: { a: string; }[]): Dog; }
->[{a: 100}] : { a: number; }[]
->{a: 100} : { a: number; }
+>[{a: 100}] : { a: 100; }[]
+>{a: 100} : { a: 100; }
 >a : number
 >100 : 100
 
diff --git a/tests/baselines/reference/fuzzy.errors.txt b/tests/baselines/reference/fuzzy.errors.txt
index b32f225a33e31..d59497b5facfb 100644
--- a/tests/baselines/reference/fuzzy.errors.txt
+++ b/tests/baselines/reference/fuzzy.errors.txt
@@ -1,6 +1,6 @@
 tests/cases/compiler/fuzzy.ts(13,18): error TS2420: Class 'C' incorrectly implements interface 'I'.
   Property 'alsoWorks' is missing in type 'C'.
-tests/cases/compiler/fuzzy.ts(21,13): error TS2322: Type '{ anything: number; oneI: this; }' is not assignable to type 'R'.
+tests/cases/compiler/fuzzy.ts(21,13): error TS2322: Type '{ anything: 1; oneI: this; }' is not assignable to type 'R'.
   Types of property 'oneI' are incompatible.
     Type 'this' is not assignable to type 'I'.
       Type 'C' is not assignable to type 'I'.
@@ -35,7 +35,7 @@ tests/cases/compiler/fuzzy.ts(25,20): error TS2352: Type '{ oneI: this; }' canno
             doesntWork():R {
                 return { anything:1, oneI:this };
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ anything: number; oneI: this; }' is not assignable to type 'R'.
+!!! error TS2322: Type '{ anything: 1; oneI: this; }' is not assignable to type 'R'.
 !!! error TS2322:   Types of property 'oneI' are incompatible.
 !!! error TS2322:     Type 'this' is not assignable to type 'I'.
 !!! error TS2322:       Type 'C' is not assignable to type 'I'.
diff --git a/tests/baselines/reference/fuzzy.types b/tests/baselines/reference/fuzzy.types
index c23b5f839c850..5332b0f47319f 100644
--- a/tests/baselines/reference/fuzzy.types
+++ b/tests/baselines/reference/fuzzy.types
@@ -43,8 +43,8 @@ module M {
             return <R>({ anything: 1 });
 ><R>({ anything: 1 }) : R
 >R : R
->({ anything: 1 }) : { anything: number; }
->{ anything: 1 } : { anything: number; }
+>({ anything: 1 }) : { anything: 1; }
+>{ anything: 1 } : { anything: 1; }
 >anything : number
 >1 : 1
         }
@@ -54,7 +54,7 @@ module M {
 >R : R
 
             return { anything:1, oneI:this };
->{ anything:1, oneI:this } : { anything: number; oneI: this; }
+>{ anything:1, oneI:this } : { anything: 1; oneI: this; }
 >anything : number
 >1 : 1
 >oneI : this
diff --git a/tests/baselines/reference/genericCallWithArrayLiteralArgs.types b/tests/baselines/reference/genericCallWithArrayLiteralArgs.types
index 2727f0c1eced7..d16224fa0510b 100644
--- a/tests/baselines/reference/genericCallWithArrayLiteralArgs.types
+++ b/tests/baselines/reference/genericCallWithArrayLiteralArgs.types
@@ -13,7 +13,7 @@ var r = foo([1, 2]); // number[]
 >r : number[]
 >foo([1, 2]) : number[]
 >foo : <T>(t: T) => T
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
@@ -21,7 +21,7 @@ var r = foo<number[]>([1, 2]); // number[]
 >r : number[]
 >foo<number[]>([1, 2]) : number[]
 >foo : <T>(t: T) => T
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
@@ -49,7 +49,7 @@ var r4 = foo([1, '']); // {}[]
 >r4 : (string | number)[]
 >foo([1, '']) : (string | number)[]
 >foo : <T>(t: T) => T
->[1, ''] : (string | number)[]
+>[1, ''] : (1 | "")[]
 >1 : 1
 >'' : ""
 
diff --git a/tests/baselines/reference/genericCallWithFunctionTypedArguments.types b/tests/baselines/reference/genericCallWithFunctionTypedArguments.types
index ee5dea94cb034..c2d8379fd497f 100644
--- a/tests/baselines/reference/genericCallWithFunctionTypedArguments.types
+++ b/tests/baselines/reference/genericCallWithFunctionTypedArguments.types
@@ -30,7 +30,7 @@ var r2 = foo<string>(<U>(x: U) => ''); // string
 >r2 : string
 >foo<string>(<U>(x: U) => '') : string
 >foo : <T>(x: (a: T) => T) => T
-><U>(x: U) => '' : <U>(x: U) => string
+><U>(x: U) => '' : <U>(x: U) => ""
 >U : U
 >x : U
 >U : U
@@ -86,7 +86,7 @@ var r6 = foo2<string, number>('', <Z>(a: Z) => 1);
 >foo2<string, number>('', <Z>(a: Z) => 1) : number
 >foo2 : <T, U>(x: T, cb: (a: T) => U) => U
 >'' : ""
-><Z>(a: Z) => 1 : <Z>(a: Z) => number
+><Z>(a: Z) => 1 : <Z>(a: Z) => 1
 >Z : Z
 >a : Z
 >Z : Z
@@ -138,7 +138,7 @@ var r9 = foo3<number, string>(1, (a) => '', ''); // string
 >foo3<number, string>(1, (a) => '', '') : string
 >foo3 : <T, U>(x: T, cb: (a: T) => U, y: U) => U
 >1 : 1
->(a) => '' : (a: number) => string
+>(a) => '' : (a: number) => ""
 >a : number
 >'' : ""
 >'' : ""
diff --git a/tests/baselines/reference/genericCallWithObjectLiteralArgs.errors.txt b/tests/baselines/reference/genericCallWithObjectLiteralArgs.errors.txt
index c1724a8f6989f..07838ae880a7f 100644
--- a/tests/baselines/reference/genericCallWithObjectLiteralArgs.errors.txt
+++ b/tests/baselines/reference/genericCallWithObjectLiteralArgs.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectLiteralArgs.ts(5,13): error TS2345: Argument of type '{ bar: number; baz: string; }' is not assignable to parameter of type '{ bar: number; baz: number; }'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectLiteralArgs.ts(5,13): error TS2345: Argument of type '{ bar: 1; baz: string; }' is not assignable to parameter of type '{ bar: number; baz: number; }'.
   Types of property 'baz' are incompatible.
     Type 'string' is not assignable to type 'number'.
 
@@ -10,7 +10,7 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObj
     
     var r = foo({ bar: 1, baz: '' }); // error
                 ~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ bar: number; baz: string; }' is not assignable to parameter of type '{ bar: number; baz: number; }'.
+!!! error TS2345: Argument of type '{ bar: 1; baz: string; }' is not assignable to parameter of type '{ bar: number; baz: number; }'.
 !!! error TS2345:   Types of property 'baz' are incompatible.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     var r2 = foo({ bar: 1, baz: 1 }); // T = number
diff --git a/tests/baselines/reference/genericCallWithObjectLiteralArgs.types b/tests/baselines/reference/genericCallWithObjectLiteralArgs.types
index 3065a22569af9..b4d1f4dd72d6d 100644
--- a/tests/baselines/reference/genericCallWithObjectLiteralArgs.types
+++ b/tests/baselines/reference/genericCallWithObjectLiteralArgs.types
@@ -26,7 +26,7 @@ var r2 = foo({ bar: 1, baz: 1 }); // T = number
 >r2 : { bar: number; baz: number; }
 >foo({ bar: 1, baz: 1 }) : { bar: number; baz: number; }
 >foo : <T>(x: { bar: T; baz: T; }) => { bar: T; baz: T; }
->{ bar: 1, baz: 1 } : { bar: number; baz: number; }
+>{ bar: 1, baz: 1 } : { bar: 1; baz: 1; }
 >bar : number
 >1 : 1
 >baz : number
diff --git a/tests/baselines/reference/genericCallWithObjectLiteralArguments1.errors.txt b/tests/baselines/reference/genericCallWithObjectLiteralArguments1.errors.txt
index cbc573641556d..bf9048e339248 100644
--- a/tests/baselines/reference/genericCallWithObjectLiteralArguments1.errors.txt
+++ b/tests/baselines/reference/genericCallWithObjectLiteralArguments1.errors.txt
@@ -1,16 +1,16 @@
-tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(3,13): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(3,13): error TS2345: Argument of type '{ x: 3; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
   Types of property 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(4,22): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(4,22): error TS2345: Argument of type '{ x: 3; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
   Types of property 'y' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(5,22): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: string; y: string; }'.
+tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(5,22): error TS2345: Argument of type '{ x: number; y: ""; }' is not assignable to parameter of type '{ x: string; y: string; }'.
   Types of property 'x' are incompatible.
     Type 'number' is not assignable to type 'string'.
-tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(6,22): error TS2345: Argument of type '{ x: string; y: number; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(6,22): error TS2345: Argument of type '{ x: string; y: 4; }' is not assignable to parameter of type '{ x: number; y: number; }'.
   Types of property 'x' are incompatible.
     Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(7,22): error TS2345: Argument of type '{ x: string; y: number; }' is not assignable to parameter of type '{ x: string; y: string; }'.
+tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(7,22): error TS2345: Argument of type '{ x: ""; y: number; }' is not assignable to parameter of type '{ x: string; y: string; }'.
   Types of property 'y' are incompatible.
     Type 'number' is not assignable to type 'string'.
 
@@ -20,26 +20,26 @@ tests/cases/compiler/genericCallWithObjectLiteralArguments1.ts(7,22): error TS23
     // these are all errors
     var x = foo({ x: 3, y: "" }, 4);
                 ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+!!! error TS2345: Argument of type '{ x: 3; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
 !!! error TS2345:   Types of property 'y' are incompatible.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     var x2 = foo<number>({ x: 3, y: "" }, 4); 
                          ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+!!! error TS2345: Argument of type '{ x: 3; y: string; }' is not assignable to parameter of type '{ x: number; y: number; }'.
 !!! error TS2345:   Types of property 'y' are incompatible.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     var x3 = foo<string>({ x: 3, y: "" }, 4); 
                          ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type '{ x: string; y: string; }'.
+!!! error TS2345: Argument of type '{ x: number; y: ""; }' is not assignable to parameter of type '{ x: string; y: string; }'.
 !!! error TS2345:   Types of property 'x' are incompatible.
 !!! error TS2345:     Type 'number' is not assignable to type 'string'.
     var x4 = foo<number>({ x: "", y: 4 }, "");
                          ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: string; y: number; }' is not assignable to parameter of type '{ x: number; y: number; }'.
+!!! error TS2345: Argument of type '{ x: string; y: 4; }' is not assignable to parameter of type '{ x: number; y: number; }'.
 !!! error TS2345:   Types of property 'x' are incompatible.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     var x5 = foo<string>({ x: "", y: 4 }, "");
                          ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: string; y: number; }' is not assignable to parameter of type '{ x: string; y: string; }'.
+!!! error TS2345: Argument of type '{ x: ""; y: number; }' is not assignable to parameter of type '{ x: string; y: string; }'.
 !!! error TS2345:   Types of property 'y' are incompatible.
 !!! error TS2345:     Type 'number' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.types b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.types
index 69bb70bc64f8f..39694ae026f3d 100644
--- a/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.types
+++ b/tests/baselines/reference/genericCallWithObjectTypeArgsAndConstraints4.types
@@ -62,7 +62,7 @@ var r3 = foo(c, { x: '', foo: c });
 >foo(c, { x: '', foo: c }) : (x: C) => { x: string; foo: C; }
 >foo : <T, U extends T>(t: T, t2: U) => (x: T) => U
 >c : C
->{ x: '', foo: c } : { x: string; foo: C; }
+>{ x: '', foo: c } : { x: ""; foo: C; }
 >x : string
 >'' : ""
 >foo : C
diff --git a/tests/baselines/reference/genericCallWithTupleType.errors.txt b/tests/baselines/reference/genericCallWithTupleType.errors.txt
index 65920596c456b..d051d10fbc938 100644
--- a/tests/baselines/reference/genericCallWithTupleType.errors.txt
+++ b/tests/baselines/reference/genericCallWithTupleType.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(12,1): error TS2322: Type '[string, number, boolean, boolean]' is not assignable to type '[string, number]'.
+tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(12,1): error TS2322: Type '["foo", 5, boolean, boolean]' is not assignable to type '[string, number]'.
   Types of property 'length' are incompatible.
     Type '4' is not assignable to type '2'.
 tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTupleType.ts(14,1): error TS2322: Type '{ a: string; }' is not assignable to type 'string | number'.
@@ -25,7 +25,7 @@ tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithTup
     var e2 = i1.tuple1[1];  // number
     i1.tuple1 = ["foo", 5, false, true];
     ~~~~~~~~~
-!!! error TS2322: Type '[string, number, boolean, boolean]' is not assignable to type '[string, number]'.
+!!! error TS2322: Type '["foo", 5, boolean, boolean]' is not assignable to type '[string, number]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '4' is not assignable to type '2'.
     var e3 = i1.tuple1[2];  // {}
diff --git a/tests/baselines/reference/genericCallWithTupleType.types b/tests/baselines/reference/genericCallWithTupleType.types
index 8a843b551122b..a7ebd9a24eb9d 100644
--- a/tests/baselines/reference/genericCallWithTupleType.types
+++ b/tests/baselines/reference/genericCallWithTupleType.types
@@ -20,11 +20,11 @@ var i2: I<{}, {}>;
 
 // no error
 i1.tuple1 = ["foo", 5];
->i1.tuple1 = ["foo", 5] : [string, number]
+>i1.tuple1 = ["foo", 5] : ["foo", 5]
 >i1.tuple1 : [string, number]
 >i1 : I<string, number>
 >tuple1 : [string, number]
->["foo", 5] : [string, number]
+>["foo", 5] : ["foo", 5]
 >"foo" : "foo"
 >5 : 5
 
@@ -45,11 +45,11 @@ var e2 = i1.tuple1[1];  // number
 >1 : 1
 
 i1.tuple1 = ["foo", 5, false, true];
->i1.tuple1 = ["foo", 5, false, true] : [string, number, boolean, boolean]
+>i1.tuple1 = ["foo", 5, false, true] : ["foo", 5, boolean, boolean]
 >i1.tuple1 : [string, number]
 >i1 : I<string, number>
 >tuple1 : [string, number]
->["foo", 5, false, true] : [string, number, boolean, boolean]
+>["foo", 5, false, true] : ["foo", 5, boolean, boolean]
 >"foo" : "foo"
 >5 : 5
 >false : false
diff --git a/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.types b/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.types
index 17672958b21a2..40d15f939d045 100644
--- a/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.types
+++ b/tests/baselines/reference/genericClassWithFunctionTypedMemberArguments.types
@@ -47,7 +47,7 @@ module ImmediatelyFix {
 >c.foo : <T>(x: (a: T) => T) => T
 >c : C<number>
 >foo : <T>(x: (a: T) => T) => T
-><U>(x: U) => '' : <U>(x: U) => string
+><U>(x: U) => '' : <U>(x: U) => ""
 >U : U
 >x : U
 >U : U
@@ -92,7 +92,7 @@ module ImmediatelyFix {
 >c2.foo : (x: (a: number) => number) => number
 >c2 : C2<number>
 >foo : (x: (a: number) => number) => number
-><U>(x: U) => 1 : <U>(x: U) => number
+><U>(x: U) => 1 : <U>(x: U) => 1
 >U : U
 >x : U
 >U : U
@@ -104,7 +104,7 @@ module ImmediatelyFix {
 >c2.foo : (x: (a: number) => number) => number
 >c2 : C2<number>
 >foo : (x: (a: number) => number) => number
->x => 1 : (x: number) => number
+>x => 1 : (x: number) => 1
 >x : number
 >1 : 1
 }
@@ -169,7 +169,7 @@ module WithCandidates {
 >c : C<number>
 >foo2 : <T, U>(x: T, cb: (a: T) => U) => U
 >'' : ""
-><Z>(a: Z) => 1 : <Z>(a: Z) => number
+><Z>(a: Z) => 1 : <Z>(a: Z) => 1
 >Z : Z
 >a : Z
 >Z : Z
@@ -209,7 +209,7 @@ module WithCandidates {
 >c2 : C2<number, string>
 >foo3 : (x: number, cb: (a: number) => string, y: string) => string
 >1 : 1
-><Z>(a: Z) => '' : <Z>(a: Z) => string
+><Z>(a: Z) => '' : <Z>(a: Z) => ""
 >Z : Z
 >a : Z
 >Z : Z
@@ -223,7 +223,7 @@ module WithCandidates {
 >c2 : C2<number, string>
 >foo3 : (x: number, cb: (a: number) => string, y: string) => string
 >1 : 1
->function (a) { return '' } : (a: number) => string
+>function (a) { return '' } : (a: number) => ""
 >a : number
 >'' : ""
 >'' : ""
diff --git a/tests/baselines/reference/genericFunctionTypedArgumentsAreFixed.types b/tests/baselines/reference/genericFunctionTypedArgumentsAreFixed.types
index dc61c28ea1bea..06f0a221cf9c0 100644
--- a/tests/baselines/reference/genericFunctionTypedArgumentsAreFixed.types
+++ b/tests/baselines/reference/genericFunctionTypedArgumentsAreFixed.types
@@ -19,6 +19,6 @@ map((a) => a.length, [1]);
 >a.length : any
 >a : number
 >length : any
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 
diff --git a/tests/baselines/reference/genericTypeAliases.types b/tests/baselines/reference/genericTypeAliases.types
index 722347b0f72b3..6bd018eb5ac18 100644
--- a/tests/baselines/reference/genericTypeAliases.types
+++ b/tests/baselines/reference/genericTypeAliases.types
@@ -13,19 +13,19 @@ type Tree<T> = T | { left: Tree<T>, right: Tree<T> };
 var tree: Tree<number> = {
 >tree : Tree<number>
 >Tree : Tree<T>
->{    left: {        left: 0,        right: {            left: 1,            right: 2        },    },    right: 3} : { left: { left: number; right: { left: number; right: number; }; }; right: number; }
+>{    left: {        left: 0,        right: {            left: 1,            right: 2        },    },    right: 3} : { left: { left: 0; right: { left: 1; right: 2; }; }; right: 3; }
 
     left: {
->left : { left: number; right: { left: number; right: number; }; }
->{        left: 0,        right: {            left: 1,            right: 2        },    } : { left: number; right: { left: number; right: number; }; }
+>left : { left: 0; right: { left: 1; right: 2; }; }
+>{        left: 0,        right: {            left: 1,            right: 2        },    } : { left: 0; right: { left: 1; right: 2; }; }
 
         left: 0,
 >left : number
 >0 : 0
 
         right: {
->right : { left: number; right: number; }
->{            left: 1,            right: 2        } : { left: number; right: number; }
+>right : { left: 1; right: 2; }
+>{            left: 1,            right: 2        } : { left: 1; right: 2; }
 
             left: 1,
 >left : number
@@ -59,9 +59,9 @@ ls = "eager";
 >"eager" : "eager"
 
 ls = () => "lazy";
->ls = () => "lazy" : () => string
+>ls = () => "lazy" : () => "lazy"
 >ls : Lazy<string>
->() => "lazy" : () => string
+>() => "lazy" : () => "lazy"
 >"lazy" : "lazy"
 
 type Foo<T> = T | { x: Foo<T> };
@@ -105,18 +105,18 @@ x = "string";
 >"string" : "string"
 
 x = { x: "hello" };
->x = { x: "hello" } : { x: string; }
+>x = { x: "hello" } : { x: "hello"; }
 >x : Foo<string>
->{ x: "hello" } : { x: string; }
+>{ x: "hello" } : { x: "hello"; }
 >x : string
 >"hello" : "hello"
 
 x = { x: { x: "world" } };
->x = { x: { x: "world" } } : { x: { x: string; }; }
+>x = { x: { x: "world" } } : { x: { x: "world"; }; }
 >x : Foo<string>
->{ x: { x: "world" } } : { x: { x: string; }; }
->x : { x: string; }
->{ x: "world" } : { x: string; }
+>{ x: { x: "world" } } : { x: { x: "world"; }; }
+>x : { x: "world"; }
+>{ x: "world" } : { x: "world"; }
 >x : string
 >"world" : "world"
 
@@ -130,18 +130,18 @@ z = 42;
 >42 : 42
 
 z = { x: 42 };
->z = { x: 42 } : { x: number; }
+>z = { x: 42 } : { x: 42; }
 >z : Foo<number>
->{ x: 42 } : { x: number; }
+>{ x: 42 } : { x: 42; }
 >x : number
 >42 : 42
 
 z = { x: { x: 42 } };
->z = { x: { x: 42 } } : { x: { x: number; }; }
+>z = { x: { x: 42 } } : { x: { x: 42; }; }
 >z : Foo<number>
->{ x: { x: 42 } } : { x: { x: number; }; }
->x : { x: number; }
->{ x: 42 } : { x: number; }
+>{ x: { x: 42 } } : { x: { x: 42; }; }
+>x : { x: 42; }
+>{ x: 42 } : { x: 42; }
 >x : number
 >42 : 42
 
diff --git a/tests/baselines/reference/heterogeneousArrayAndOverloads.errors.txt b/tests/baselines/reference/heterogeneousArrayAndOverloads.errors.txt
index e5c2be7a598a1..1f79e21d3a026 100644
--- a/tests/baselines/reference/heterogeneousArrayAndOverloads.errors.txt
+++ b/tests/baselines/reference/heterogeneousArrayAndOverloads.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/compiler/heterogeneousArrayAndOverloads.ts(9,19): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'string[]'.
-  Type 'string | number' is not assignable to type 'string'.
+tests/cases/compiler/heterogeneousArrayAndOverloads.ts(9,19): error TS2345: Argument of type '(number | "hi")[]' is not assignable to parameter of type 'string[]'.
+  Type 'number | "hi"' is not assignable to type 'string'.
     Type 'number' is not assignable to type 'string'.
 
 
@@ -14,8 +14,8 @@ tests/cases/compiler/heterogeneousArrayAndOverloads.ts(9,19): error TS2345: Argu
             this.test([]);
             this.test([1, 2, "hi", 5]); // Error
                       ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'string[]'.
-!!! error TS2345:   Type 'string | number' is not assignable to type 'string'.
+!!! error TS2345: Argument of type '(number | "hi")[]' is not assignable to parameter of type 'string[]'.
+!!! error TS2345:   Type 'number | "hi"' is not assignable to type 'string'.
 !!! error TS2345:     Type 'number' is not assignable to type 'string'.
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/heterogeneousArrayAndOverloads.types b/tests/baselines/reference/heterogeneousArrayAndOverloads.types
index beb59c9eab8a0..7ae275806bc43 100644
--- a/tests/baselines/reference/heterogeneousArrayAndOverloads.types
+++ b/tests/baselines/reference/heterogeneousArrayAndOverloads.types
@@ -22,7 +22,7 @@ class arrTest {
 >this.test : { (arg1: number[]): any; (arg1: string[]): any; }
 >this : this
 >test : { (arg1: number[]): any; (arg1: string[]): any; }
->[1, 2, 3, 5] : number[]
+>[1, 2, 3, 5] : (1 | 2 | 3 | 5)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -33,7 +33,7 @@ class arrTest {
 >this.test : { (arg1: number[]): any; (arg1: string[]): any; }
 >this : this
 >test : { (arg1: number[]): any; (arg1: string[]): any; }
->["hi"] : string[]
+>["hi"] : "hi"[]
 >"hi" : "hi"
 
         this.test([]);
diff --git a/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.types b/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.types
index 50b339492baaa..cb4ca46dc5fe5 100644
--- a/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.types
+++ b/tests/baselines/reference/implicitAnyFunctionInvocationWithAnyArguements.types
@@ -50,7 +50,7 @@ function testFuncLiteral(funcLit: (y2) => number) { };
 testFunctionExprC2((v1, v2) => 1);
 >testFunctionExprC2((v1, v2) => 1) : void
 >testFunctionExprC2 : (eq: (v1: any, v2: any) => number) => void
->(v1, v2) => 1 : (v1: any, v2: any) => number
+>(v1, v2) => 1 : (v1: any, v2: any) => 1
 >v1 : any
 >v2 : any
 >1 : 1
diff --git a/tests/baselines/reference/implicitIndexSignatures.types b/tests/baselines/reference/implicitIndexSignatures.types
index 0b68f136e2e5f..04acdadb16de9 100644
--- a/tests/baselines/reference/implicitIndexSignatures.types
+++ b/tests/baselines/reference/implicitIndexSignatures.types
@@ -28,9 +28,9 @@ let map: StringMap;
 >StringMap : StringMap
 
 map = { x: "xxx", y: "yyy" };
->map = { x: "xxx", y: "yyy" } : { x: string; y: string; }
+>map = { x: "xxx", y: "yyy" } : { x: "xxx"; y: "yyy"; }
 >map : StringMap
->{ x: "xxx", y: "yyy" } : { x: string; y: string; }
+>{ x: "xxx", y: "yyy" } : { x: "xxx"; y: "yyy"; }
 >x : string
 >"xxx" : "xxx"
 >y : string
diff --git a/tests/baselines/reference/importAliasIdentifiers.types b/tests/baselines/reference/importAliasIdentifiers.types
index 4c9701ded100f..9c1609b663194 100644
--- a/tests/baselines/reference/importAliasIdentifiers.types
+++ b/tests/baselines/reference/importAliasIdentifiers.types
@@ -50,7 +50,7 @@ module clodule {
     var Point: Point = { x: 0, y: 0 };
 >Point : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -101,7 +101,7 @@ module fundule {
     var Point: Point = { x: 0, y: 0 };
 >Point : Point
 >Point : Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/incrementOperatorWithNumberType.types b/tests/baselines/reference/incrementOperatorWithNumberType.types
index 03030289a77c7..e4677378d4c56 100644
--- a/tests/baselines/reference/incrementOperatorWithNumberType.types
+++ b/tests/baselines/reference/incrementOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/incrementOperatorWithNumberTypeInvalidOperations.types b/tests/baselines/reference/incrementOperatorWithNumberTypeInvalidOperations.types
index b9ce83dfe6777..f5497de4d3a29 100644
--- a/tests/baselines/reference/incrementOperatorWithNumberTypeInvalidOperations.types
+++ b/tests/baselines/reference/incrementOperatorWithNumberTypeInvalidOperations.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/incrementOperatorWithUnsupportedStringType.types b/tests/baselines/reference/incrementOperatorWithUnsupportedStringType.types
index 9f6a00060369d..2d7c23354ed18 100644
--- a/tests/baselines/reference/incrementOperatorWithUnsupportedStringType.types
+++ b/tests/baselines/reference/incrementOperatorWithUnsupportedStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", ""];
 >STRING1 : string[]
->["", ""] : string[]
+>["", ""] : ""[]
 >"" : ""
 >"" : ""
 
diff --git a/tests/baselines/reference/indexSignaturesInferentialTyping.types b/tests/baselines/reference/indexSignaturesInferentialTyping.types
index 202e14898184d..c15bab1ef32fc 100644
--- a/tests/baselines/reference/indexSignaturesInferentialTyping.types
+++ b/tests/baselines/reference/indexSignaturesInferentialTyping.types
@@ -21,7 +21,7 @@ var x1 = foo({ 0: 0, 1: 1 });       // type should be number
 >x1 : number
 >foo({ 0: 0, 1: 1 }) : number
 >foo : <T>(items: { [index: number]: T; }) => T
->{ 0: 0, 1: 1 } : { 0: number; 1: number; }
+>{ 0: 0, 1: 1 } : { 0: 0; 1: 1; }
 >0 : 0
 >1 : 1
 
@@ -29,7 +29,7 @@ var x2 = bar({ 0: 0, 1: 1 });
 >x2 : number
 >bar({ 0: 0, 1: 1 }) : number
 >bar : <T>(items: { [index: string]: T; }) => T
->{ 0: 0, 1: 1 } : { 0: number; 1: number; }
+>{ 0: 0, 1: 1 } : { 0: 0; 1: 1; }
 >0 : 0
 >1 : 1
 
@@ -37,7 +37,7 @@ var x3 = bar({ zero: 0, one: 1 });  // type should be number
 >x3 : number
 >bar({ zero: 0, one: 1 }) : number
 >bar : <T>(items: { [index: string]: T; }) => T
->{ zero: 0, one: 1 } : { zero: number; one: number; }
+>{ zero: 0, one: 1 } : { zero: 0; one: 1; }
 >zero : number
 >0 : 0
 >one : number
diff --git a/tests/baselines/reference/indexer.types b/tests/baselines/reference/indexer.types
index 6f648d8d2321b..df595dac9ed54 100644
--- a/tests/baselines/reference/indexer.types
+++ b/tests/baselines/reference/indexer.types
@@ -17,11 +17,11 @@ interface JQuery {
 var jq:JQuery={ 0: { id : "a" }, 1: { id : "b" } };
 >jq : JQuery
 >JQuery : JQuery
->{ 0: { id : "a" }, 1: { id : "b" } } : { 0: { id: string; }; 1: { id: string; }; }
->{ id : "a" } : { id: string; }
+>{ 0: { id : "a" }, 1: { id : "b" } } : { 0: { id: "a"; }; 1: { id: "b"; }; }
+>{ id : "a" } : { id: "a"; }
 >id : string
 >"a" : "a"
->{ id : "b" } : { id: string; }
+>{ id : "b" } : { id: "b"; }
 >id : string
 >"b" : "b"
 
diff --git a/tests/baselines/reference/indexerA.types b/tests/baselines/reference/indexerA.types
index e0eadbc06b4d1..eca1d4a3fed76 100644
--- a/tests/baselines/reference/indexerA.types
+++ b/tests/baselines/reference/indexerA.types
@@ -17,11 +17,11 @@ class JQuery {
 var jq:JQuery={ 0: { id : "a" }, 1: { id : "b" } };
 >jq : JQuery
 >JQuery : JQuery
->{ 0: { id : "a" }, 1: { id : "b" } } : { 0: { id: string; }; 1: { id: string; }; }
->{ id : "a" } : { id: string; }
+>{ 0: { id : "a" }, 1: { id : "b" } } : { 0: { id: "a"; }; 1: { id: "b"; }; }
+>{ id : "a" } : { id: "a"; }
 >id : string
 >"a" : "a"
->{ id : "b" } : { id: string; }
+>{ id : "b" } : { id: "b"; }
 >id : string
 >"b" : "b"
 
diff --git a/tests/baselines/reference/indexerWithTuple.types b/tests/baselines/reference/indexerWithTuple.types
index 8a14fa9816e44..d95b803425914 100644
--- a/tests/baselines/reference/indexerWithTuple.types
+++ b/tests/baselines/reference/indexerWithTuple.types
@@ -1,27 +1,27 @@
 === tests/cases/conformance/types/tuple/indexerWithTuple.ts ===
 var strNumTuple: [string, number] = ["foo", 10]; 
 >strNumTuple : [string, number]
->["foo", 10] : [string, number]
+>["foo", 10] : ["foo", 10]
 >"foo" : "foo"
 >10 : 10
 
 var numTupleTuple: [number, [string, number]] = [10, ["bar", 20]];
 >numTupleTuple : [number, [string, number]]
->[10, ["bar", 20]] : [number, [string, number]]
+>[10, ["bar", 20]] : [10, ["bar", 20]]
 >10 : 10
->["bar", 20] : [string, number]
+>["bar", 20] : ["bar", 20]
 >"bar" : "bar"
 >20 : 20
 
 var unionTuple1: [number, string| number] = [10, "foo"]; 
 >unionTuple1 : [number, string | number]
->[10, "foo"] : [number, string]
+>[10, "foo"] : [10, "foo"]
 >10 : 10
 >"foo" : "foo"
 
 var unionTuple2: [boolean, string| number] = [true, "foo"]; 
 >unionTuple2 : [boolean, string | number]
->[true, "foo"] : [true, string]
+>[true, "foo"] : [true, "foo"]
 >true : true
 >"foo" : "foo"
 
diff --git a/tests/baselines/reference/indirectTypeParameterReferences.types b/tests/baselines/reference/indirectTypeParameterReferences.types
index e38f5dd2577aa..ac4950f70121e 100644
--- a/tests/baselines/reference/indirectTypeParameterReferences.types
+++ b/tests/baselines/reference/indirectTypeParameterReferences.types
@@ -46,7 +46,7 @@ const {combined, literal} = flowtypes<{a: string}>({b: 'b-value'})
 >flowtypes<{a: string}>({b: 'b-value'}) : { combined: (fn: (combined: { a: string; } & B) => void) => any; literal: (fn: (aPlusB: { a: string; } & B) => void) => any; }
 >flowtypes : <A>(b: B) => { combined: (fn: (combined: A & B) => void) => any; literal: (fn: (aPlusB: A & B) => void) => any; }
 >a : string
->{b: 'b-value'} : { b: string; }
+>{b: 'b-value'} : { b: "b-value"; }
 >b : string
 >'b-value' : "b-value"
 
diff --git a/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.types b/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.types
index 58d51e48987f4..9f972547d84f6 100644
--- a/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.types
+++ b/tests/baselines/reference/inferentialTypingWithFunctionTypeZip.types
@@ -33,7 +33,7 @@ var result = zipWith([1, 2], ['a', 'b'], pair);
 >result : { x: number; y: {}; }[]
 >zipWith([1, 2], ['a', 'b'], pair) : { x: number; y: {}; }[]
 >zipWith : <T, S, U>(a: T[], b: S[], f: (x: T) => (y: S) => U) => U[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 >['a', 'b'] : string[]
diff --git a/tests/baselines/reference/inferentialTypingWithObjectLiteralProperties.types b/tests/baselines/reference/inferentialTypingWithObjectLiteralProperties.types
index 80b3253cba20b..0c038a89b8035 100644
--- a/tests/baselines/reference/inferentialTypingWithObjectLiteralProperties.types
+++ b/tests/baselines/reference/inferentialTypingWithObjectLiteralProperties.types
@@ -21,9 +21,9 @@ f({ x: [null] }, { x: [1] }).x[0] = "" // ok
 >x : null[]
 >[null] : null[]
 >null : null
->{ x: [1] } : { x: number[]; }
->x : number[]
->[1] : number[]
+>{ x: [1] } : { x: 1[]; }
+>x : 1[]
+>[1] : 1[]
 >1 : 1
 >x : number[]
 >0 : 0
@@ -35,9 +35,9 @@ f({ x: [1] }, { x: [null] }).x[0] = "" // was error TS2011: Cannot convert 'stri
 >f({ x: [1] }, { x: [null] }).x : number[]
 >f({ x: [1] }, { x: [null] }) : { x: number[]; }
 >f : <T>(x: T, y: T) => T
->{ x: [1] } : { x: number[]; }
->x : number[]
->[1] : number[]
+>{ x: [1] } : { x: 1[]; }
+>x : 1[]
+>[1] : 1[]
 >1 : 1
 >{ x: [null] } : { x: null[]; }
 >x : null[]
diff --git a/tests/baselines/reference/inheritance.types b/tests/baselines/reference/inheritance.types
index a71b56a6b695e..c1a78ae34e2ae 100644
--- a/tests/baselines/reference/inheritance.types
+++ b/tests/baselines/reference/inheritance.types
@@ -45,7 +45,7 @@ class Good {
 
     public f: () => number = function () { return 0; }
 >f : () => number
->function () { return 0; } : () => number
+>function () { return 0; } : () => 0
 >0 : 0
 
     public g() { return 0; }
diff --git a/tests/baselines/reference/instanceMemberAssignsToClassPrototype.types b/tests/baselines/reference/instanceMemberAssignsToClassPrototype.types
index 86312372e320d..02991d5fc7726 100644
--- a/tests/baselines/reference/instanceMemberAssignsToClassPrototype.types
+++ b/tests/baselines/reference/instanceMemberAssignsToClassPrototype.types
@@ -40,13 +40,13 @@ class C {
 >x : number
 
         C.prototype.bar = (x: number) => 1; // ok
->C.prototype.bar = (x: number) => 1 : (x: number) => number
+>C.prototype.bar = (x: number) => 1 : (x: number) => 1
 >C.prototype.bar : (x: number) => number
 >C.prototype : C
 >C : typeof C
 >prototype : C
 >bar : (x: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/instantiatedModule.types b/tests/baselines/reference/instantiatedModule.types
index b7072d6bb7385..2b7bc5a6ba6ac 100644
--- a/tests/baselines/reference/instantiatedModule.types
+++ b/tests/baselines/reference/instantiatedModule.types
@@ -67,7 +67,7 @@ module M2 {
 >Point : Point
 
             return { x: 0, y: 0 };
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/interface0.types b/tests/baselines/reference/interface0.types
index 9a70cf066b177..7363d18e5d1d3 100644
--- a/tests/baselines/reference/interface0.types
+++ b/tests/baselines/reference/interface0.types
@@ -11,7 +11,7 @@ interface Generic<T> {
 var y: Generic<number> = { x: 3 };
 >y : Generic<number>
 >Generic : Generic<T>
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
 
diff --git a/tests/baselines/reference/interfaceAssignmentCompat.types b/tests/baselines/reference/interfaceAssignmentCompat.types
index 0a9ee4394a3aa..a9643e3fab362 100644
--- a/tests/baselines/reference/interfaceAssignmentCompat.types
+++ b/tests/baselines/reference/interfaceAssignmentCompat.types
@@ -76,33 +76,33 @@ module M {
 >"" : ""
     
         x[0]={ color:Color.Brown };
->x[0]={ color:Color.Brown } : { color: Color; }
+>x[0]={ color:Color.Brown } : { color: Color.Brown; }
 >x[0] : IEye
 >x : IEye[]
 >0 : 0
->{ color:Color.Brown } : { color: Color; }
+>{ color:Color.Brown } : { color: Color.Brown; }
 >color : Color
 >Color.Brown : Color.Brown
 >Color : typeof Color
 >Brown : Color.Brown
 
         x[1]={ color:Color.Blue };
->x[1]={ color:Color.Blue } : { color: Color; }
+>x[1]={ color:Color.Blue } : { color: Color.Blue; }
 >x[1] : IEye
 >x : IEye[]
 >1 : 1
->{ color:Color.Blue } : { color: Color; }
+>{ color:Color.Blue } : { color: Color.Blue; }
 >color : Color
 >Color.Blue : Color.Blue
 >Color : typeof Color
 >Blue : Color.Blue
 
         x[2]={ color:Color.Green };
->x[2]={ color:Color.Green } : { color: Color; }
+>x[2]={ color:Color.Green } : { color: Color.Green; }
 >x[2] : IEye
 >x : IEye[]
 >2 : 2
->{ color:Color.Green } : { color: Color; }
+>{ color:Color.Green } : { color: Color.Green; }
 >color : Color
 >Color.Green : Color.Green
 >Color : typeof Color
diff --git a/tests/baselines/reference/interfaceDoesNotDependOnBaseTypes.types b/tests/baselines/reference/interfaceDoesNotDependOnBaseTypes.types
index eae55bc09d1ed..fbd13c58027a2 100644
--- a/tests/baselines/reference/interfaceDoesNotDependOnBaseTypes.types
+++ b/tests/baselines/reference/interfaceDoesNotDependOnBaseTypes.types
@@ -21,7 +21,7 @@ if (typeof x !== "string") {
 >x.push : (...items: StringTree[]) => number
 >x : StringTreeArray
 >push : (...items: StringTree[]) => number
->[""] : string[]
+>[""] : ""[]
 >"" : ""
 }
 
diff --git a/tests/baselines/reference/interfaceImplementation6.types b/tests/baselines/reference/interfaceImplementation6.types
index e83a2e1273a5b..77b5e477521e9 100644
--- a/tests/baselines/reference/interfaceImplementation6.types
+++ b/tests/baselines/reference/interfaceImplementation6.types
@@ -38,7 +38,7 @@ export class Test {
     private pt: I1 = { item: 1 };
 >pt : I1
 >I1 : I1
->{ item: 1 } : { item: number; }
+>{ item: 1 } : { item: 1; }
 >item : number
 >1 : 1
 }
diff --git a/tests/baselines/reference/interfaceWithPropertyOfEveryType.types b/tests/baselines/reference/interfaceWithPropertyOfEveryType.types
index 07832f23fc343..a7e7bc3a27e48 100644
--- a/tests/baselines/reference/interfaceWithPropertyOfEveryType.types
+++ b/tests/baselines/reference/interfaceWithPropertyOfEveryType.types
@@ -80,7 +80,7 @@ interface Foo {
 var a: Foo = {
 >a : Foo
 >Foo : Foo
->{    a: 1,    b: '',    c: true,    d: {},    e: null ,    f: [1],    g: {},    h: (x: number) => 1,    i: <T>(x: T) => x,    j: <Foo>null,    k: new C(),    l: f1,    m: M,    n: {},    o: E.A} : { a: number; b: string; c: true; d: {}; e: null; f: number[]; g: {}; h: (x: number) => number; i: <T>(x: T) => T; j: Foo; k: C; l: () => void; m: typeof M; n: {}; o: E; }
+>{    a: 1,    b: '',    c: true,    d: {},    e: null ,    f: [1],    g: {},    h: (x: number) => 1,    i: <T>(x: T) => x,    j: <Foo>null,    k: new C(),    l: f1,    m: M,    n: {},    o: E.A} : { a: 1; b: ""; c: true; d: {}; e: null; f: 1[]; g: {}; h: (x: number) => 1; i: <T>(x: T) => T; j: Foo; k: C; l: () => void; m: typeof M; n: {}; o: E; }
 
     a: 1,
 >a : number
@@ -103,8 +103,8 @@ var a: Foo = {
 >null : null
 
     f: [1],
->f : number[]
->[1] : number[]
+>f : 1[]
+>[1] : 1[]
 >1 : 1
 
     g: {},
@@ -112,8 +112,8 @@ var a: Foo = {
 >{} : {}
 
     h: (x: number) => 1,
->h : (x: number) => number
->(x: number) => 1 : (x: number) => number
+>h : (x: number) => 1
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/intersectionThisTypes.types b/tests/baselines/reference/intersectionThisTypes.types
index 285609cdfdc21..d15f44bab1461 100644
--- a/tests/baselines/reference/intersectionThisTypes.types
+++ b/tests/baselines/reference/intersectionThisTypes.types
@@ -124,11 +124,11 @@ function test(label: Label) {
 >label.extend : <T>(props: T) => Label & T
 >label : Label
 >extend : <T>(props: T) => Label & T
->{ id: 67 } : { id: number; }
+>{ id: 67 } : { id: 67; }
 >id : number
 >67 : 67
 >extend : <T>(props: T) => Label & { id: number; } & T
->{ tag: "hello" } : { tag: string; }
+>{ tag: "hello" } : { tag: "hello"; }
 >tag : string
 >"hello" : "hello"
 
diff --git a/tests/baselines/reference/intersectionTypeInference.types b/tests/baselines/reference/intersectionTypeInference.types
index 0b1fa1c937c9b..c5a46ff0e81b0 100644
--- a/tests/baselines/reference/intersectionTypeInference.types
+++ b/tests/baselines/reference/intersectionTypeInference.types
@@ -43,10 +43,10 @@ var x = extend({ a: "hello" }, { b: 42 });
 >x : { a: string; } & { b: number; }
 >extend({ a: "hello" }, { b: 42 }) : { a: string; } & { b: number; }
 >extend : <T, U>(obj1: T, obj2: U) => T & U
->{ a: "hello" } : { a: string; }
+>{ a: "hello" } : { a: "hello"; }
 >a : string
 >"hello" : "hello"
->{ b: 42 } : { b: number; }
+>{ b: 42 } : { b: 42; }
 >b : number
 >42 : 42
 
@@ -100,7 +100,7 @@ var z = foo({ a: "hello", b: 42 });
 >z : string | number
 >foo({ a: "hello", b: 42 }) : string | number
 >foo : <T, U>(obj: A<T> & B<U>) => T | U
->{ a: "hello", b: 42 } : { a: string; b: number; }
+>{ a: "hello", b: 42 } : { a: "hello"; b: 42; }
 >a : string
 >"hello" : "hello"
 >b : number
diff --git a/tests/baselines/reference/intersectionTypeInference1.types b/tests/baselines/reference/intersectionTypeInference1.types
index 9417f63336115..13cce26d24c9c 100644
--- a/tests/baselines/reference/intersectionTypeInference1.types
+++ b/tests/baselines/reference/intersectionTypeInference1.types
@@ -35,7 +35,7 @@ export const Form3 = brokenFunction(parameterFn)({store: "hello"})
 >brokenFunction(parameterFn) : (o: { store: string; }) => { store: string; }
 >brokenFunction : <OwnProps>(f: (p: { dispatch: number; } & OwnProps) => void) => (o: OwnProps) => OwnProps
 >parameterFn : (props: { store: string; }) => void
->{store: "hello"} : { store: string; }
+>{store: "hello"} : { store: "hello"; }
 >store : string
 >"hello" : "hello"
 
diff --git a/tests/baselines/reference/intersectionTypeMembers.types b/tests/baselines/reference/intersectionTypeMembers.types
index 4d1da7eab73d8..262ceb1b301a8 100644
--- a/tests/baselines/reference/intersectionTypeMembers.types
+++ b/tests/baselines/reference/intersectionTypeMembers.types
@@ -138,15 +138,15 @@ const de: D & E = {
 >de : D & E
 >D : D
 >E : E
->{    nested: {        doublyNested: {            d: 'yes',            f: 'no'        },        different: { e: 12 },        other: { g: 101 }    }} : { nested: { doublyNested: { d: string; f: string; }; different: { e: number; }; other: { g: number; }; }; }
+>{    nested: {        doublyNested: {            d: 'yes',            f: 'no'        },        different: { e: 12 },        other: { g: 101 }    }} : { nested: { doublyNested: { d: "yes"; f: "no"; }; different: { e: 12; }; other: { g: 101; }; }; }
 
     nested: {
->nested : { doublyNested: { d: string; f: string; }; different: { e: number; }; other: { g: number; }; }
->{        doublyNested: {            d: 'yes',            f: 'no'        },        different: { e: 12 },        other: { g: 101 }    } : { doublyNested: { d: string; f: string; }; different: { e: number; }; other: { g: number; }; }
+>nested : { doublyNested: { d: "yes"; f: "no"; }; different: { e: 12; }; other: { g: 101; }; }
+>{        doublyNested: {            d: 'yes',            f: 'no'        },        different: { e: 12 },        other: { g: 101 }    } : { doublyNested: { d: "yes"; f: "no"; }; different: { e: 12; }; other: { g: 101; }; }
 
         doublyNested: {
->doublyNested : { d: string; f: string; }
->{            d: 'yes',            f: 'no'        } : { d: string; f: string; }
+>doublyNested : { d: "yes"; f: "no"; }
+>{            d: 'yes',            f: 'no'        } : { d: "yes"; f: "no"; }
 
             d: 'yes',
 >d : string
@@ -158,14 +158,14 @@ const de: D & E = {
 
         },
         different: { e: 12 },
->different : { e: number; }
->{ e: 12 } : { e: number; }
+>different : { e: 12; }
+>{ e: 12 } : { e: 12; }
 >e : number
 >12 : 12
 
         other: { g: 101 }
->other : { g: number; }
->{ g: 101 } : { g: number; }
+>other : { g: 101; }
+>{ g: 101 } : { g: 101; }
 >g : number
 >101 : 101
     }
diff --git a/tests/baselines/reference/invalidReturnStatements.errors.txt b/tests/baselines/reference/invalidReturnStatements.errors.txt
index 0f51e75a47d23..6b21ffb6de048 100644
--- a/tests/baselines/reference/invalidReturnStatements.errors.txt
+++ b/tests/baselines/reference/invalidReturnStatements.errors.txt
@@ -2,8 +2,8 @@ tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(2
 tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(3,17): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(4,17): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
 tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(5,17): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(16,22): error TS2322: Type '{ id: number; }' is not assignable to type 'D'.
-  Property 'name' is missing in type '{ id: number; }'.
+tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(16,22): error TS2322: Type '{ id: 12; }' is not assignable to type 'D'.
+  Property 'name' is missing in type '{ id: 12; }'.
 tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(18,22): error TS2322: Type 'C' is not assignable to type 'D'.
   Property 'name' is missing in type 'C'.
 
@@ -34,8 +34,8 @@ tests/cases/conformance/statements/returnStatements/invalidReturnStatements.ts(1
     }
     function fn10(): D { return { id: 12 }; } 
                          ~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ id: number; }' is not assignable to type 'D'.
-!!! error TS2322:   Property 'name' is missing in type '{ id: number; }'.
+!!! error TS2322: Type '{ id: 12; }' is not assignable to type 'D'.
+!!! error TS2322:   Property 'name' is missing in type '{ id: 12; }'.
     
     function fn11(): D { return new C(); }
                          ~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/invalidReturnStatements.types b/tests/baselines/reference/invalidReturnStatements.types
index 6ce341f90dad3..ddad80fd6f892 100644
--- a/tests/baselines/reference/invalidReturnStatements.types
+++ b/tests/baselines/reference/invalidReturnStatements.types
@@ -40,7 +40,7 @@ class D extends C {
 function fn10(): D { return { id: 12 }; } 
 >fn10 : () => D
 >D : D
->{ id: 12 } : { id: number; }
+>{ id: 12 } : { id: 12; }
 >id : number
 >12 : 12
 
diff --git a/tests/baselines/reference/isomorphicMappedTypeInference.types b/tests/baselines/reference/isomorphicMappedTypeInference.types
index 2e13f69c5eb39..531ba957ada0c 100644
--- a/tests/baselines/reference/isomorphicMappedTypeInference.types
+++ b/tests/baselines/reference/isomorphicMappedTypeInference.types
@@ -570,7 +570,7 @@ foo(o, {b: 9});
 >foo(o, {b: 9}) : { a: number; b: number; }
 >foo : <T>(object: T, partial: Partial<T>) => T
 >o : { a: number; b: number; }
->{b: 9} : { b: number; }
+>{b: 9} : { b: 9; }
 >b : number
 >9 : 9
 
@@ -580,7 +580,7 @@ o = foo(o, {b: 9});
 >foo(o, {b: 9}) : { a: number; b: number; }
 >foo : <T>(object: T, partial: Partial<T>) => T
 >o : { a: number; b: number; }
->{b: 9} : { b: number; }
+>{b: 9} : { b: 9; }
 >b : number
 >9 : 9
 
diff --git a/tests/baselines/reference/iterableArrayPattern23.types b/tests/baselines/reference/iterableArrayPattern23.types
index 83345816b9180..34cb8409b2602 100644
--- a/tests/baselines/reference/iterableArrayPattern23.types
+++ b/tests/baselines/reference/iterableArrayPattern23.types
@@ -4,11 +4,11 @@ var a: string, b: boolean;
 >b : boolean
 
 [a, b] = { 0: "", 1: true };
->[a, b] = { 0: "", 1: true } : { 0: string; 1: true; }
+>[a, b] = { 0: "", 1: true } : { 0: ""; 1: true; }
 >[a, b] : [string, boolean]
 >a : string
 >b : boolean
->{ 0: "", 1: true } : { 0: string; 1: true; }
+>{ 0: "", 1: true } : { 0: ""; 1: true; }
 >"" : ""
 >true : true
 
diff --git a/tests/baselines/reference/iterableArrayPattern25.types b/tests/baselines/reference/iterableArrayPattern25.types
index c9d94679603ff..2cd95ab512d90 100644
--- a/tests/baselines/reference/iterableArrayPattern25.types
+++ b/tests/baselines/reference/iterableArrayPattern25.types
@@ -11,11 +11,11 @@ takeFirstTwoEntries(new Map([["", 0], ["hello", 1]]));
 >takeFirstTwoEntries : (...[[k1, v1], [k2, v2]]: [[any, any], [any, any]]) => void
 >new Map([["", 0], ["hello", 1]]) : Map<string, number>
 >Map : MapConstructor
->[["", 0], ["hello", 1]] : [string, number][]
->["", 0] : [string, number]
+>[["", 0], ["hello", 1]] : (["", 0] | ["hello", 1])[]
+>["", 0] : ["", 0]
 >"" : ""
 >0 : 0
->["hello", 1] : [string, number]
+>["hello", 1] : ["hello", 1]
 >"hello" : "hello"
 >1 : 1
 
diff --git a/tests/baselines/reference/iterableArrayPattern26.types b/tests/baselines/reference/iterableArrayPattern26.types
index da73bb7c8e9af..43fb803e2fa7a 100644
--- a/tests/baselines/reference/iterableArrayPattern26.types
+++ b/tests/baselines/reference/iterableArrayPattern26.types
@@ -11,11 +11,11 @@ takeFirstTwoEntries(new Map([["", 0], ["hello", 1]]));
 >takeFirstTwoEntries : (...[[k1, v1], [k2, v2]]: [string, number][]) => void
 >new Map([["", 0], ["hello", 1]]) : Map<string, number>
 >Map : MapConstructor
->[["", 0], ["hello", 1]] : [string, number][]
->["", 0] : [string, number]
+>[["", 0], ["hello", 1]] : (["", 0] | ["hello", 1])[]
+>["", 0] : ["", 0]
 >"" : ""
 >0 : 0
->["hello", 1] : [string, number]
+>["hello", 1] : ["hello", 1]
 >"hello" : "hello"
 >1 : 1
 
diff --git a/tests/baselines/reference/iterableArrayPattern27.types b/tests/baselines/reference/iterableArrayPattern27.types
index 3d1b08b5bf324..278df5c65316d 100644
--- a/tests/baselines/reference/iterableArrayPattern27.types
+++ b/tests/baselines/reference/iterableArrayPattern27.types
@@ -12,11 +12,11 @@ takeFirstTwoEntries(...new Map([["", 0], ["hello", 1]]));
 >...new Map([["", 0], ["hello", 1]]) : [string, number]
 >new Map([["", 0], ["hello", 1]]) : Map<string, number>
 >Map : MapConstructor
->[["", 0], ["hello", 1]] : [string, number][]
->["", 0] : [string, number]
+>[["", 0], ["hello", 1]] : (["", 0] | ["hello", 1])[]
+>["", 0] : ["", 0]
 >"" : ""
 >0 : 0
->["hello", 1] : [string, number]
+>["hello", 1] : ["hello", 1]
 >"hello" : "hello"
 >1 : 1
 
diff --git a/tests/baselines/reference/iterableArrayPattern28.errors.txt b/tests/baselines/reference/iterableArrayPattern28.errors.txt
index ac744111b45a9..56b3b756d80d6 100644
--- a/tests/baselines/reference/iterableArrayPattern28.errors.txt
+++ b/tests/baselines/reference/iterableArrayPattern28.errors.txt
@@ -1,13 +1,13 @@
 tests/cases/conformance/es6/destructuring/iterableArrayPattern28.ts(1,33): error TS2501: A rest element cannot contain a binding pattern.
-tests/cases/conformance/es6/destructuring/iterableArrayPattern28.ts(2,32): error TS2345: Argument of type '([string, number] | [string, boolean])[]' is not assignable to parameter of type 'Iterable<[string, number]>'.
+tests/cases/conformance/es6/destructuring/iterableArrayPattern28.ts(2,32): error TS2345: Argument of type '(["", 0] | ["hello", boolean])[]' is not assignable to parameter of type 'Iterable<[string, number]>'.
   Types of property '[Symbol.iterator]' are incompatible.
-    Type '() => IterableIterator<[string, number] | [string, boolean]>' is not assignable to type '() => Iterator<[string, number]>'.
-      Type 'IterableIterator<[string, number] | [string, boolean]>' is not assignable to type 'Iterator<[string, number]>'.
+    Type '() => IterableIterator<["", 0] | ["hello", boolean]>' is not assignable to type '() => Iterator<[string, number]>'.
+      Type 'IterableIterator<["", 0] | ["hello", boolean]>' is not assignable to type 'Iterator<[string, number]>'.
         Types of property 'next' are incompatible.
-          Type '(value?: any) => IteratorResult<[string, number] | [string, boolean]>' is not assignable to type '(value?: any) => IteratorResult<[string, number]>'.
-            Type 'IteratorResult<[string, number] | [string, boolean]>' is not assignable to type 'IteratorResult<[string, number]>'.
-              Type '[string, number] | [string, boolean]' is not assignable to type '[string, number]'.
-                Type '[string, boolean]' is not assignable to type '[string, number]'.
+          Type '(value?: any) => IteratorResult<["", 0] | ["hello", boolean]>' is not assignable to type '(value?: any) => IteratorResult<[string, number]>'.
+            Type 'IteratorResult<["", 0] | ["hello", boolean]>' is not assignable to type 'IteratorResult<[string, number]>'.
+              Type '["", 0] | ["hello", boolean]' is not assignable to type '[string, number]'.
+                Type '["hello", boolean]' is not assignable to type '[string, number]'.
                   Type 'boolean' is not assignable to type 'number'.
 
 
@@ -17,13 +17,13 @@ tests/cases/conformance/es6/destructuring/iterableArrayPattern28.ts(2,32): error
 !!! error TS2501: A rest element cannot contain a binding pattern.
     takeFirstTwoEntries(...new Map([["", 0], ["hello", true]]));
                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '([string, number] | [string, boolean])[]' is not assignable to parameter of type 'Iterable<[string, number]>'.
+!!! error TS2345: Argument of type '(["", 0] | ["hello", boolean])[]' is not assignable to parameter of type 'Iterable<[string, number]>'.
 !!! error TS2345:   Types of property '[Symbol.iterator]' are incompatible.
-!!! error TS2345:     Type '() => IterableIterator<[string, number] | [string, boolean]>' is not assignable to type '() => Iterator<[string, number]>'.
-!!! error TS2345:       Type 'IterableIterator<[string, number] | [string, boolean]>' is not assignable to type 'Iterator<[string, number]>'.
+!!! error TS2345:     Type '() => IterableIterator<["", 0] | ["hello", boolean]>' is not assignable to type '() => Iterator<[string, number]>'.
+!!! error TS2345:       Type 'IterableIterator<["", 0] | ["hello", boolean]>' is not assignable to type 'Iterator<[string, number]>'.
 !!! error TS2345:         Types of property 'next' are incompatible.
-!!! error TS2345:           Type '(value?: any) => IteratorResult<[string, number] | [string, boolean]>' is not assignable to type '(value?: any) => IteratorResult<[string, number]>'.
-!!! error TS2345:             Type 'IteratorResult<[string, number] | [string, boolean]>' is not assignable to type 'IteratorResult<[string, number]>'.
-!!! error TS2345:               Type '[string, number] | [string, boolean]' is not assignable to type '[string, number]'.
-!!! error TS2345:                 Type '[string, boolean]' is not assignable to type '[string, number]'.
+!!! error TS2345:           Type '(value?: any) => IteratorResult<["", 0] | ["hello", boolean]>' is not assignable to type '(value?: any) => IteratorResult<[string, number]>'.
+!!! error TS2345:             Type 'IteratorResult<["", 0] | ["hello", boolean]>' is not assignable to type 'IteratorResult<[string, number]>'.
+!!! error TS2345:               Type '["", 0] | ["hello", boolean]' is not assignable to type '[string, number]'.
+!!! error TS2345:                 Type '["hello", boolean]' is not assignable to type '[string, number]'.
 !!! error TS2345:                   Type 'boolean' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/iterableArrayPattern29.types b/tests/baselines/reference/iterableArrayPattern29.types
index faa7527290470..157d5bf8e7060 100644
--- a/tests/baselines/reference/iterableArrayPattern29.types
+++ b/tests/baselines/reference/iterableArrayPattern29.types
@@ -12,11 +12,11 @@ takeFirstTwoEntries(...new Map([["", true], ["hello", true]]));
 >...new Map([["", true], ["hello", true]]) : [string, boolean]
 >new Map([["", true], ["hello", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true], ["hello", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true], ["hello", true]] : (["", true] | ["hello", true])[]
+>["", true] : ["", true]
 >"" : ""
 >true : true
->["hello", true] : [string, true]
+>["hello", true] : ["hello", true]
 >"hello" : "hello"
 >true : true
 
diff --git a/tests/baselines/reference/iterableArrayPattern30.types b/tests/baselines/reference/iterableArrayPattern30.types
index 1abdba039ed98..f6556f8297209 100644
--- a/tests/baselines/reference/iterableArrayPattern30.types
+++ b/tests/baselines/reference/iterableArrayPattern30.types
@@ -6,11 +6,11 @@ const [[k1, v1], [k2, v2]] = new Map([["", true], ["hello", true]])
 >v2 : boolean
 >new Map([["", true], ["hello", true]]) : Map<string, boolean>
 >Map : MapConstructor
->[["", true], ["hello", true]] : [string, true][]
->["", true] : [string, true]
+>[["", true], ["hello", true]] : (["", true] | ["hello", true])[]
+>["", true] : ["", true]
 >"" : ""
 >true : true
->["hello", true] : [string, true]
+>["hello", true] : ["hello", true]
 >"hello" : "hello"
 >true : true
 
diff --git a/tests/baselines/reference/iteratorSpreadInArray5.errors.txt b/tests/baselines/reference/iteratorSpreadInArray5.errors.txt
index 02049824c4fdd..1fe95f44c66e2 100644
--- a/tests/baselines/reference/iteratorSpreadInArray5.errors.txt
+++ b/tests/baselines/reference/iteratorSpreadInArray5.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/es6/spread/iteratorSpreadInArray5.ts(14,5): error TS2322: Type '(number | symbol)[]' is not assignable to type 'number[]'.
-  Type 'number | symbol' is not assignable to type 'number'.
+tests/cases/conformance/es6/spread/iteratorSpreadInArray5.ts(14,5): error TS2322: Type '(symbol | 0 | 1)[]' is not assignable to type 'number[]'.
+  Type 'symbol | 0 | 1' is not assignable to type 'number'.
     Type 'symbol' is not assignable to type 'number'.
 
 
@@ -19,6 +19,6 @@ tests/cases/conformance/es6/spread/iteratorSpreadInArray5.ts(14,5): error TS2322
     
     var array: number[] = [0, 1, ...new SymbolIterator];
         ~~~~~
-!!! error TS2322: Type '(number | symbol)[]' is not assignable to type 'number[]'.
-!!! error TS2322:   Type 'number | symbol' is not assignable to type 'number'.
+!!! error TS2322: Type '(symbol | 0 | 1)[]' is not assignable to type 'number[]'.
+!!! error TS2322:   Type 'symbol | 0 | 1' is not assignable to type 'number'.
 !!! error TS2322:     Type 'symbol' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/iteratorSpreadInArray5.types b/tests/baselines/reference/iteratorSpreadInArray5.types
index 3c67000dae409..ce3966d59f71a 100644
--- a/tests/baselines/reference/iteratorSpreadInArray5.types
+++ b/tests/baselines/reference/iteratorSpreadInArray5.types
@@ -32,7 +32,7 @@ class SymbolIterator {
 
 var array: number[] = [0, 1, ...new SymbolIterator];
 >array : number[]
->[0, 1, ...new SymbolIterator] : (number | symbol)[]
+>[0, 1, ...new SymbolIterator] : (symbol | 0 | 1)[]
 >0 : 0
 >1 : 1
 >...new SymbolIterator : symbol
diff --git a/tests/baselines/reference/iteratorSpreadInArray6.types b/tests/baselines/reference/iteratorSpreadInArray6.types
index 5ed866d78694c..c7f4faf8525cc 100644
--- a/tests/baselines/reference/iteratorSpreadInArray6.types
+++ b/tests/baselines/reference/iteratorSpreadInArray6.types
@@ -32,7 +32,7 @@ class SymbolIterator {
 
 var array: number[] = [0, 1];
 >array : number[]
->[0, 1] : number[]
+>[0, 1] : (0 | 1)[]
 >0 : 0
 >1 : 1
 
diff --git a/tests/baselines/reference/jsdocDisallowedInTypescript.types b/tests/baselines/reference/jsdocDisallowedInTypescript.types
index 8fe4a032f206b..6ea3299aa3529 100644
--- a/tests/baselines/reference/jsdocDisallowedInTypescript.types
+++ b/tests/baselines/reference/jsdocDisallowedInTypescript.types
@@ -3,7 +3,7 @@
 var ara: Array.<number> = [1,2,3];
 >ara : number[]
 >Array : T[]
->[1,2,3] : number[]
+>[1,2,3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/jsdocParamTagTypeLiteral.types b/tests/baselines/reference/jsdocParamTagTypeLiteral.types
index 95adecafc8364..fbb2615c56b5a 100644
--- a/tests/baselines/reference/jsdocParamTagTypeLiteral.types
+++ b/tests/baselines/reference/jsdocParamTagTypeLiteral.types
@@ -35,7 +35,7 @@ function foo1(opts1) {
 foo1({x: 'abc'});
 >foo1({x: 'abc'}) : void
 >foo1 : (opts1: { x: string; y?: string; z?: string; w?: string; }) => void
->{x: 'abc'} : { x: string; }
+>{x: 'abc'} : { x: "abc"; }
 >x : string
 >'abc' : "abc"
 
@@ -59,8 +59,8 @@ function foo2(/** @param opts2 bad idea theatre! */opts2) {
 foo2([{anotherX: "world"}]);
 >foo2([{anotherX: "world"}]) : void
 >foo2 : (opts2: { anotherX: string; anotherY?: string; }[]) => void
->[{anotherX: "world"}] : { anotherX: string; }[]
->{anotherX: "world"} : { anotherX: string; }
+>[{anotherX: "world"}] : { anotherX: "world"; }[]
+>{anotherX: "world"} : { anotherX: "world"; }
 >anotherX : string
 >"world" : "world"
 
@@ -80,7 +80,7 @@ function foo3(opts3) {
 foo3({x: 'abc'});
 >foo3({x: 'abc'}) : void
 >foo3 : (opts3: { x: string; }) => void
->{x: 'abc'} : { x: string; }
+>{x: 'abc'} : { x: "abc"; }
 >x : string
 >'abc' : "abc"
 
@@ -106,8 +106,8 @@ function foo4(opts4) {
 foo4([{ x: 'hi' }]);
 >foo4([{ x: 'hi' }]) : void
 >foo4 : (opts4: { x: string; y?: string; z?: string; w?: string; }[]) => void
->[{ x: 'hi' }] : { x: string; }[]
->{ x: 'hi' } : { x: string; }
+>[{ x: 'hi' }] : { x: "hi"; }[]
+>{ x: 'hi' } : { x: "hi"; }
 >x : string
 >'hi' : "hi"
 
@@ -149,17 +149,17 @@ function foo5(opts5) {
 foo5([{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 }]);
 >foo5([{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 }]) : void
 >foo5 : (opts5: { help: string; what: { a: string; bad: { idea: string; oh: boolean; }[]; }; unnest: number; }[]) => void
->[{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 }] : { help: string; what: { a: string; bad: { idea: string; oh: false; }[]; }; unnest: number; }[]
->{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 } : { help: string; what: { a: string; bad: { idea: string; oh: false; }[]; }; unnest: number; }
+>[{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 }] : { help: "help"; what: { a: "a"; bad: { idea: "idea"; oh: false; }[]; }; unnest: 1; }[]
+>{ help: "help", what: { a: 'a', bad: [{ idea: 'idea', oh: false }] }, unnest: 1 } : { help: "help"; what: { a: "a"; bad: { idea: "idea"; oh: false; }[]; }; unnest: 1; }
 >help : string
 >"help" : "help"
->what : { a: string; bad: { idea: string; oh: false; }[]; }
->{ a: 'a', bad: [{ idea: 'idea', oh: false }] } : { a: string; bad: { idea: string; oh: false; }[]; }
+>what : { a: "a"; bad: { idea: "idea"; oh: false; }[]; }
+>{ a: 'a', bad: [{ idea: 'idea', oh: false }] } : { a: "a"; bad: { idea: "idea"; oh: false; }[]; }
 >a : string
 >'a' : "a"
->bad : { idea: string; oh: false; }[]
->[{ idea: 'idea', oh: false }] : { idea: string; oh: false; }[]
->{ idea: 'idea', oh: false } : { idea: string; oh: false; }
+>bad : { idea: "idea"; oh: false; }[]
+>[{ idea: 'idea', oh: false }] : { idea: "idea"; oh: false; }[]
+>{ idea: 'idea', oh: false } : { idea: "idea"; oh: false; }
 >idea : string
 >'idea' : "idea"
 >oh : boolean
diff --git a/tests/baselines/reference/json.stringify.types b/tests/baselines/reference/json.stringify.types
index a25eac5aaf7ad..9f7bfd059658f 100644
--- a/tests/baselines/reference/json.stringify.types
+++ b/tests/baselines/reference/json.stringify.types
@@ -27,7 +27,7 @@ JSON.stringify(value, ["a", 1], 2);
 >JSON : JSON
 >stringify : { (value: any, replacer?: ((key: string, value: any) => any) | undefined, space?: string | number | undefined): string; (value: any, replacer?: (string | number)[] | null | undefined, space?: string | number | undefined): string; }
 >value : null
->["a", 1] : (string | number)[]
+>["a", 1] : ("a" | 1)[]
 >"a" : "a"
 >1 : 1
 >2 : 2
diff --git a/tests/baselines/reference/keyofAndIndexedAccess.types b/tests/baselines/reference/keyofAndIndexedAccess.types
index 302cefabf90b5..7499b932e337f 100644
--- a/tests/baselines/reference/keyofAndIndexedAccess.types
+++ b/tests/baselines/reference/keyofAndIndexedAccess.types
@@ -572,7 +572,7 @@ function f31<K extends keyof Shape>(key: K) {
     const shape: Shape = { name: "foo", width: 5, height: 10, visible: true };
 >shape : Shape
 >Shape : Shape
->{ name: "foo", width: 5, height: 10, visible: true } : { name: string; width: number; height: number; visible: true; }
+>{ name: "foo", width: 5, height: 10, visible: true } : { name: "foo"; width: 5; height: 10; visible: true; }
 >name : string
 >"foo" : "foo"
 >width : number
@@ -597,7 +597,7 @@ function f32<K extends "width" | "height">(key: K) {
     const shape: Shape = { name: "foo", width: 5, height: 10, visible: true };
 >shape : Shape
 >Shape : Shape
->{ name: "foo", width: 5, height: 10, visible: true } : { name: string; width: number; height: number; visible: true; }
+>{ name: "foo", width: 5, height: 10, visible: true } : { name: "foo"; width: 5; height: 10; visible: true; }
 >name : string
 >"foo" : "foo"
 >width : number
@@ -947,7 +947,7 @@ function f71(func: <T, U>(x: T, y: U) => Partial<T & U>) {
 >x : Partial<{ a: number; b: string; } & { c: boolean; }>
 >func({ a: 1, b: "hello" }, { c: true }) : Partial<{ a: number; b: string; } & { c: boolean; }>
 >func : <T, U>(x: T, y: U) => Partial<T & U>
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -994,7 +994,7 @@ function f72(func: <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T &
 >a : number
 >func({ a: 1, b: "hello" }, { c: true }, 'a') : number
 >func : <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1008,7 +1008,7 @@ function f72(func: <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T &
 >b : string
 >func({ a: 1, b: "hello" }, { c: true }, 'b') : string
 >func : <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1022,7 +1022,7 @@ function f72(func: <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T &
 >c : boolean
 >func({ a: 1, b: "hello" }, { c: true }, 'c') : boolean
 >func : <T, U, K extends keyof T | keyof U>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1055,7 +1055,7 @@ function f73(func: <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[
 >a : number
 >func({ a: 1, b: "hello" }, { c: true }, 'a') : number
 >func : <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1069,7 +1069,7 @@ function f73(func: <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[
 >b : string
 >func({ a: 1, b: "hello" }, { c: true }, 'b') : string
 >func : <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1083,7 +1083,7 @@ function f73(func: <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[
 >c : boolean
 >func({ a: 1, b: "hello" }, { c: true }, 'c') : boolean
 >func : <T, U, K extends keyof (T & U)>(x: T, y: U, k: K) => (T & U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
@@ -1116,12 +1116,12 @@ function f74(func: <T, U, K extends keyof (T | U)>(x: T, y: U, k: K) => (T | U)[
 >a : number
 >func({ a: 1, b: "hello" }, { a: 2, b: true }, 'a') : number
 >func : <T, U, K extends keyof (T | U)>(x: T, y: U, k: K) => (T | U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
 >"hello" : "hello"
->{ a: 2, b: true } : { a: number; b: true; }
+>{ a: 2, b: true } : { a: 2; b: true; }
 >a : number
 >2 : 2
 >b : boolean
@@ -1132,12 +1132,12 @@ function f74(func: <T, U, K extends keyof (T | U)>(x: T, y: U, k: K) => (T | U)[
 >b : string | boolean
 >func({ a: 1, b: "hello" }, { a: 2, b: true }, 'b') : string | boolean
 >func : <T, U, K extends keyof (T | U)>(x: T, y: U, k: K) => (T | U)[K]
->{ a: 1, b: "hello" } : { a: number; b: string; }
+>{ a: 1, b: "hello" } : { a: 1; b: "hello"; }
 >a : number
 >1 : 1
 >b : string
 >"hello" : "hello"
->{ a: 2, b: true } : { a: number; b: true; }
+>{ a: 2, b: true } : { a: 2; b: true; }
 >a : number
 >2 : 2
 >b : boolean
@@ -1225,9 +1225,9 @@ function f82() {
 >x1 : string
 >f81({ a: { x: "hello" } }) : string
 >f81 : <T extends { a: { x: any; }; }>(obj: T) => T["a"]["x"]
->{ a: { x: "hello" } } : { a: { x: string; }; }
->a : { x: string; }
->{ x: "hello" } : { x: string; }
+>{ a: { x: "hello" } } : { a: { x: "hello"; }; }
+>a : { x: "hello"; }
+>{ x: "hello" } : { x: "hello"; }
 >x : string
 >"hello" : "hello"
 
@@ -1235,9 +1235,9 @@ function f82() {
 >x2 : number
 >f81({ a: { x: 42 } }) : number
 >f81 : <T extends { a: { x: any; }; }>(obj: T) => T["a"]["x"]
->{ a: { x: 42 } } : { a: { x: number; }; }
->a : { x: number; }
->{ x: 42 } : { x: number; }
+>{ a: { x: 42 } } : { a: { x: 42; }; }
+>a : { x: 42; }
+>{ x: 42 } : { x: 42; }
 >x : number
 >42 : 42
 }
@@ -1272,9 +1272,9 @@ function f84() {
 >x1 : string
 >f83({ foo: { x: "hello" } }, "foo") : string
 >f83 : <T extends { [x: string]: { x: any; }; }, K extends keyof T>(obj: T, key: K) => T[K]["x"]
->{ foo: { x: "hello" } } : { foo: { x: string; }; }
->foo : { x: string; }
->{ x: "hello" } : { x: string; }
+>{ foo: { x: "hello" } } : { foo: { x: "hello"; }; }
+>foo : { x: "hello"; }
+>{ x: "hello" } : { x: "hello"; }
 >x : string
 >"hello" : "hello"
 >"foo" : "foo"
@@ -1283,9 +1283,9 @@ function f84() {
 >x2 : number
 >f83({ bar: { x: 42 } }, "bar") : number
 >f83 : <T extends { [x: string]: { x: any; }; }, K extends keyof T>(obj: T, key: K) => T[K]["x"]
->{ bar: { x: 42 } } : { bar: { x: number; }; }
->bar : { x: number; }
->{ x: 42 } : { x: number; }
+>{ bar: { x: 42 } } : { bar: { x: 42; }; }
+>bar : { x: 42; }
+>{ x: 42 } : { x: 42; }
 >x : number
 >42 : 42
 >"bar" : "bar"
@@ -1852,11 +1852,11 @@ let c1 = new Component1({
 >c1 : Component1<{ hello: string; }, {}>
 >new Component1({    data: {        hello: ""    }}) : Component1<{ hello: string; }, {}>
 >Component1 : typeof Component1
->{    data: {        hello: ""    }} : { data: { hello: string; }; }
+>{    data: {        hello: ""    }} : { data: { hello: ""; }; }
 
     data: {
->data : { hello: string; }
->{        hello: ""    } : { hello: string; }
+>data : { hello: ""; }
+>{        hello: ""    } : { hello: ""; }
 
         hello: ""
 >hello : string
@@ -1981,7 +1981,7 @@ let result = dispatchMethod<SomeMethodDescriptor>("someMethod", ["hello", 35]);
 >dispatchMethod : <M extends MethodDescriptor>(name: M["name"], args: M["args"]) => M["returnValue"]
 >SomeMethodDescriptor : SomeMethodDescriptor
 >"someMethod" : "someMethod"
->["hello", 35] : [string, number]
+>["hello", 35] : ["hello", 35]
 >"hello" : "hello"
 >35 : 35
 
@@ -2263,7 +2263,7 @@ class AnotherSampleClass<T> extends SampleClass<T & Foo> {
         const foo: Foo = { foo: "bar" };
 >foo : Foo
 >Foo : Foo
->{ foo: "bar" } : { foo: string; }
+>{ foo: "bar" } : { foo: "bar"; }
 >foo : string
 >"bar" : "bar"
 
diff --git a/tests/baselines/reference/keyofIsLiteralContexualType.types b/tests/baselines/reference/keyofIsLiteralContexualType.types
index c93057b38b4cb..1d8cc50b1714a 100644
--- a/tests/baselines/reference/keyofIsLiteralContexualType.types
+++ b/tests/baselines/reference/keyofIsLiteralContexualType.types
@@ -42,7 +42,7 @@ let x = pick({ a: 10, b: 20, c: 30 }, ["a", "c"]);
 >x : Pick<{ a: number; b: number; c: number; }, "a" | "c">
 >pick({ a: 10, b: 20, c: 30 }, ["a", "c"]) : Pick<{ a: number; b: number; c: number; }, "a" | "c">
 >pick : <T, K extends keyof T>(obj: T, propNames: K[]) => Pick<T, K>
->{ a: 10, b: 20, c: 30 } : { a: number; b: number; c: number; }
+>{ a: 10, b: 20, c: 30 } : { a: 10; b: 20; c: 30; }
 >a : number
 >10 : 10
 >b : number
diff --git a/tests/baselines/reference/lambdaParamTypes.types b/tests/baselines/reference/lambdaParamTypes.types
index 3eb05ea693840..e64fcc6239603 100644
--- a/tests/baselines/reference/lambdaParamTypes.types
+++ b/tests/baselines/reference/lambdaParamTypes.types
@@ -29,13 +29,13 @@ var thing = create([{ name: "bob", id: 24 }, { name: "doug", id: 32 }]);
 >thing : MyArrayWrapper<{ name: string; id: number; }>
 >create([{ name: "bob", id: 24 }, { name: "doug", id: 32 }]) : MyArrayWrapper<{ name: string; id: number; }>
 >create : <T>(initialValues?: T[]) => MyArrayWrapper<T>
->[{ name: "bob", id: 24 }, { name: "doug", id: 32 }] : { name: string; id: number; }[]
->{ name: "bob", id: 24 } : { name: string; id: number; }
+>[{ name: "bob", id: 24 }, { name: "doug", id: 32 }] : ({ name: "bob"; id: 24; } | { name: "doug"; id: 32; })[]
+>{ name: "bob", id: 24 } : { name: "bob"; id: 24; }
 >name : string
 >"bob" : "bob"
 >id : number
 >24 : 24
->{ name: "doug", id: 32 } : { name: string; id: number; }
+>{ name: "doug", id: 32 } : { name: "doug"; id: 32; }
 >name : string
 >"doug" : "doug"
 >id : number
diff --git a/tests/baselines/reference/literalTypes2.types b/tests/baselines/reference/literalTypes2.types
index ab1d3e199d2b2..db4881fa6056a 100644
--- a/tests/baselines/reference/literalTypes2.types
+++ b/tests/baselines/reference/literalTypes2.types
@@ -501,7 +501,7 @@ function f6() {
 >0 : 0
 >x3 : string
 >"foo" : "foo"
->{ x1: false, x2: 1, x3: "bar" } : { x1?: false; x2?: number; x3?: string; }
+>{ x1: false, x2: 1, x3: "bar" } : { x1?: false; x2?: 1; x3?: "bar"; }
 >x1 : boolean
 >false : false
 >x2 : number
@@ -721,7 +721,7 @@ const x7 = g6([1, 2]);  // Type number
 >x7 : number
 >g6([1, 2]) : number
 >g6 : <T>(x: T[]) => T
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/literalTypesAndTypeAssertions.types b/tests/baselines/reference/literalTypesAndTypeAssertions.types
index 4c38f74fd723c..6e3865f8549d3 100644
--- a/tests/baselines/reference/literalTypesAndTypeAssertions.types
+++ b/tests/baselines/reference/literalTypesAndTypeAssertions.types
@@ -31,7 +31,7 @@ let x2 = 1;
 let { a = "foo" } = { a: "foo" };
 >a : string
 >"foo" : "foo"
->{ a: "foo" } : { a?: string; }
+>{ a: "foo" } : { a?: "foo"; }
 >a : string
 >"foo" : "foo"
 
@@ -44,7 +44,7 @@ let { b = "foo" as "foo" } = { b: "bar" };
 >"bar" : "bar"
 
 let { c = "foo" } = { c: "bar" as "bar" };
->c : "foo" | "bar"
+>c : string
 >"foo" : "foo"
 >{ c: "bar" as "bar" } : { c?: "bar"; }
 >c : "bar"
diff --git a/tests/baselines/reference/logicalNotOperatorWithNumberType.types b/tests/baselines/reference/logicalNotOperatorWithNumberType.types
index f66f878c3bee7..4b84af2ca6eda 100644
--- a/tests/baselines/reference/logicalNotOperatorWithNumberType.types
+++ b/tests/baselines/reference/logicalNotOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/logicalNotOperatorWithStringType.types b/tests/baselines/reference/logicalNotOperatorWithStringType.types
index 0d3c1e88fd1d3..255d5944bd5c3 100644
--- a/tests/baselines/reference/logicalNotOperatorWithStringType.types
+++ b/tests/baselines/reference/logicalNotOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.errors.txt b/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.errors.txt
index 484c8f63b462e..2b8ba83f5622c 100644
--- a/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.errors.txt
+++ b/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/expressions/binaryOperators/logicalOrOperator/logicalOrExpressionIsContextuallyTyped.ts(6,33): error TS2322: Type '{ a: string; b: number; } | { a: string; b: boolean; }' is not assignable to type '{ a: string; }'.
-  Type '{ a: string; b: number; }' is not assignable to type '{ a: string; }'.
+tests/cases/conformance/expressions/binaryOperators/logicalOrOperator/logicalOrExpressionIsContextuallyTyped.ts(6,33): error TS2322: Type '{ a: ""; b: number; } | { a: ""; b: boolean; }' is not assignable to type '{ a: string; }'.
+  Type '{ a: ""; b: number; }' is not assignable to type '{ a: string; }'.
     Object literal may only specify known properties, and 'b' does not exist in type '{ a: string; }'.
 
 
@@ -11,6 +11,6 @@ tests/cases/conformance/expressions/binaryOperators/logicalOrOperator/logicalOrE
     
     var r: { a: string } = { a: '', b: 123 } || { a: '', b: true };
                                     ~~~~~~
-!!! error TS2322: Type '{ a: string; b: number; } | { a: string; b: boolean; }' is not assignable to type '{ a: string; }'.
-!!! error TS2322:   Type '{ a: string; b: number; }' is not assignable to type '{ a: string; }'.
+!!! error TS2322: Type '{ a: ""; b: number; } | { a: ""; b: boolean; }' is not assignable to type '{ a: string; }'.
+!!! error TS2322:   Type '{ a: ""; b: number; }' is not assignable to type '{ a: string; }'.
 !!! error TS2322:     Object literal may only specify known properties, and 'b' does not exist in type '{ a: string; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.types b/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.types
index 916a375568837..024eabaf9a314 100644
--- a/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.types
+++ b/tests/baselines/reference/logicalOrExpressionIsContextuallyTyped.types
@@ -7,13 +7,13 @@
 var r: { a: string } = { a: '', b: 123 } || { a: '', b: true };
 >r : { a: string; }
 >a : string
->{ a: '', b: 123 } || { a: '', b: true } : { a: string; b: number; } | { a: string; b: boolean; }
->{ a: '', b: 123 } : { a: string; b: number; }
+>{ a: '', b: 123 } || { a: '', b: true } : { a: ""; b: number; } | { a: ""; b: boolean; }
+>{ a: '', b: 123 } : { a: ""; b: number; }
 >a : string
 >'' : ""
 >b : number
 >123 : 123
->{ a: '', b: true } : { a: string; b: boolean; }
+>{ a: '', b: true } : { a: ""; b: boolean; }
 >a : string
 >'' : ""
 >b : boolean
diff --git a/tests/baselines/reference/logicalOrOperatorWithTypeParameters.types b/tests/baselines/reference/logicalOrOperatorWithTypeParameters.types
index bc7bcbf4c2e16..d04d7bc9cb114 100644
--- a/tests/baselines/reference/logicalOrOperatorWithTypeParameters.types
+++ b/tests/baselines/reference/logicalOrOperatorWithTypeParameters.types
@@ -107,10 +107,10 @@ function fn3<T extends { a: string; b: string }, U extends { a: string; b: numbe
 >u : U
 
     var r3 = t || { a: '' };
->r3 : T | { a: string; }
->t || { a: '' } : T | { a: string; }
+>r3 : T | { a: ""; }
+>t || { a: '' } : T | { a: ""; }
 >t : T
->{ a: '' } : { a: string; }
+>{ a: '' } : { a: ""; }
 >a : string
 >'' : ""
 
diff --git a/tests/baselines/reference/looseThisTypeInFunctions.types b/tests/baselines/reference/looseThisTypeInFunctions.types
index 114b5407a1f93..bafa78a3d3812 100644
--- a/tests/baselines/reference/looseThisTypeInFunctions.types
+++ b/tests/baselines/reference/looseThisTypeInFunctions.types
@@ -109,7 +109,7 @@ let i: I = o;
 let o2: I = {
 >o2 : I
 >I : I
->{    n: 1001,    explicitThis: function (m) {         return m + this.n.length;  // error, this.n: number, no member 'length'    },} : { n: number; explicitThis: (this: I, m: number) => any; }
+>{    n: 1001,    explicitThis: function (m) {         return m + this.n.length;  // error, this.n: number, no member 'length'    },} : { n: 1001; explicitThis: (this: I, m: number) => any; }
 
     n: 1001,
 >n : number
diff --git a/tests/baselines/reference/mapOnTupleTypes01.types b/tests/baselines/reference/mapOnTupleTypes01.types
index adb8a2e191c26..f897f50600db8 100644
--- a/tests/baselines/reference/mapOnTupleTypes01.types
+++ b/tests/baselines/reference/mapOnTupleTypes01.types
@@ -19,7 +19,7 @@ export let mapOnLooseArrayLiteral = [1, 2, 3, 4].map(n => n * n);
 
 let numTuple: [number] = [1];
 >numTuple : [number]
->[1] : [number]
+>[1] : [1]
 >1 : 1
 
 export let a = numTuple.map(x => x * x);
@@ -38,19 +38,19 @@ export let a = numTuple.map(x => x * x);
 
 let numNum: [number, number] = [    100,     100];
 >numNum : [number, number]
->[    100,     100] : [number, number]
+>[    100,     100] : [100, 100]
 >100 : 100
 >100 : 100
 
 let strStr: [string, string] = ["hello", "hello"];
 >strStr : [string, string]
->["hello", "hello"] : [string, string]
+>["hello", "hello"] : ["hello", "hello"]
 >"hello" : "hello"
 >"hello" : "hello"
 
 let numStr: [number, string] = [    100, "hello"];
 >numStr : [number, string]
->[    100, "hello"] : [number, string]
+>[    100, "hello"] : [100, "hello"]
 >100 : 100
 >"hello" : "hello"
 
@@ -94,7 +94,7 @@ export let d = numStr.map(x => x);
 
 let numNumNum: [number, number, number] = [1, 2, 3];
 >numNumNum : [number, number, number]
->[1, 2, 3] : [number, number, number]
+>[1, 2, 3] : [1, 2, 3]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -115,7 +115,7 @@ export let e = numNumNum.map(n => n * n);
 
 let numNumNumNum: [number, number, number, number] = [1, 2, 3, 4];
 >numNumNumNum : [number, number, number, number]
->[1, 2, 3, 4] : [number, number, number, number]
+>[1, 2, 3, 4] : [1, 2, 3, 4]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -137,7 +137,7 @@ export let f = numNumNumNum.map(n => n * n);
 
 let numNumNumNumNum: [number, number, number, number, number] = [1, 2, 3, 4, 5];
 >numNumNumNumNum : [number, number, number, number, number]
->[1, 2, 3, 4, 5] : [number, number, number, number, number]
+>[1, 2, 3, 4, 5] : [1, 2, 3, 4, 5]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -161,7 +161,7 @@ export let g = numNumNumNumNum.map(n => n * n);
 
 let numNumNumNumNumNum: [number, number, number, number, number, number] = [1, 2, 3, 4, 5, 6];
 >numNumNumNumNumNum : [number, number, number, number, number, number]
->[1, 2, 3, 4, 5, 6] : [number, number, number, number, number, number]
+>[1, 2, 3, 4, 5, 6] : [1, 2, 3, 4, 5, 6]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/mappedTypeErrors.errors.txt b/tests/baselines/reference/mappedTypeErrors.errors.txt
index 396adaadf342c..137f5fa7beacb 100644
--- a/tests/baselines/reference/mappedTypeErrors.errors.txt
+++ b/tests/baselines/reference/mappedTypeErrors.errors.txt
@@ -20,11 +20,11 @@ tests/cases/conformance/types/mapped/mappedTypeErrors.ts(59,9): error TS2403: Su
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(60,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' has type '{ [P in keyof T]: T[P]; }' at tests/cases/conformance/types/mapped/mappedTypeErrors.ts 57:8, but here has type '{ readonly [P in keyof T]: T[P]; }'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(61,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' has type '{ [P in keyof T]: T[P]; }' at tests/cases/conformance/types/mapped/mappedTypeErrors.ts 57:8, but here has type '{ readonly [P in keyof T]?: T[P] | undefined; }'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(66,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' has type '{ [P in keyof T]: T[P]; }' at tests/cases/conformance/types/mapped/mappedTypeErrors.ts 64:8, but here has type '{ [P in keyof T]: T[P][]; }'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(75,45): error TS2345: Argument of type '{ x: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
-  Property 'y' is missing in type '{ x: number; }'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(77,59): error TS2345: Argument of type '{ x: number; y: number; z: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(75,45): error TS2345: Argument of type '{ x: 1; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
+  Property 'y' is missing in type '{ x: 1; }'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(77,59): error TS2345: Argument of type '{ x: 1; y: 1; z: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
   Object literal may only specify known properties, and 'z' does not exist in type 'Readonly<{ x: number; y: number; }>'.
-tests/cases/conformance/types/mapped/mappedTypeErrors.ts(83,58): error TS2345: Argument of type '{ x: number; y: number; z: number; }' is not assignable to parameter of type 'Partial<{ x: number; y: number; }>'.
+tests/cases/conformance/types/mapped/mappedTypeErrors.ts(83,58): error TS2345: Argument of type '{ x: 1; y: 1; z: number; }' is not assignable to parameter of type 'Partial<{ x: number; y: number; }>'.
   Object literal may only specify known properties, and 'z' does not exist in type 'Partial<{ x: number; y: number; }>'.
 tests/cases/conformance/types/mapped/mappedTypeErrors.ts(105,15): error TS2345: Argument of type '{ a: undefined; }' is not assignable to parameter of type 'Pick<Foo, "a">'.
   Types of property 'a' are incompatible.
@@ -162,12 +162,12 @@ tests/cases/conformance/types/mapped/mappedTypeErrors.ts(136,21): error TS2536:
     function f20() {
         let x1 = objAndReadonly({ x: 0, y: 0 }, { x: 1 });  // Error
                                                 ~~~~~~~~
-!!! error TS2345: Argument of type '{ x: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
-!!! error TS2345:   Property 'y' is missing in type '{ x: number; }'.
+!!! error TS2345: Argument of type '{ x: 1; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
+!!! error TS2345:   Property 'y' is missing in type '{ x: 1; }'.
         let x2 = objAndReadonly({ x: 0, y: 0 }, { x: 1, y: 1 });
         let x3 = objAndReadonly({ x: 0, y: 0 }, { x: 1, y: 1, z: 1 });  // Error
                                                               ~~~~
-!!! error TS2345: Argument of type '{ x: number; y: number; z: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
+!!! error TS2345: Argument of type '{ x: 1; y: 1; z: number; }' is not assignable to parameter of type 'Readonly<{ x: number; y: number; }>'.
 !!! error TS2345:   Object literal may only specify known properties, and 'z' does not exist in type 'Readonly<{ x: number; y: number; }>'.
     }
     
@@ -176,7 +176,7 @@ tests/cases/conformance/types/mapped/mappedTypeErrors.ts(136,21): error TS2536:
         let x2 = objAndPartial({ x: 0, y: 0 }, { x: 1, y: 1 });
         let x3 = objAndPartial({ x: 0, y: 0 }, { x: 1, y: 1, z: 1 });  // Error
                                                              ~~~~
-!!! error TS2345: Argument of type '{ x: number; y: number; z: number; }' is not assignable to parameter of type 'Partial<{ x: number; y: number; }>'.
+!!! error TS2345: Argument of type '{ x: 1; y: 1; z: number; }' is not assignable to parameter of type 'Partial<{ x: number; y: number; }>'.
 !!! error TS2345:   Object literal may only specify known properties, and 'z' does not exist in type 'Partial<{ x: number; y: number; }>'.
     }
     
diff --git a/tests/baselines/reference/mappedTypeErrors.types b/tests/baselines/reference/mappedTypeErrors.types
index e830f9ce65dee..eb97183dd5663 100644
--- a/tests/baselines/reference/mappedTypeErrors.types
+++ b/tests/baselines/reference/mappedTypeErrors.types
@@ -270,12 +270,12 @@ function f20() {
 >x2 : { x: number; y: number; }
 >objAndReadonly({ x: 0, y: 0 }, { x: 1, y: 1 }) : { x: number; y: number; }
 >objAndReadonly : <T>(primary: T, secondary: Readonly<T>) => T
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
 >0 : 0
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -306,12 +306,12 @@ function f21() {
 >x1 : { x: number; y: number; }
 >objAndPartial({ x: 0, y: 0 }, { x: 1 }) : { x: number; y: number; }
 >objAndPartial : <T>(primary: T, secondary: Partial<T>) => T
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
 >0 : 0
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
@@ -319,12 +319,12 @@ function f21() {
 >x2 : { x: number; y: number; }
 >objAndPartial({ x: 0, y: 0 }, { x: 1, y: 1 }) : { x: number; y: number; }
 >objAndPartial : <T>(primary: T, secondary: Partial<T>) => T
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
 >0 : 0
->{ x: 1, y: 1 } : { x: number; y: number; }
+>{ x: 1, y: 1 } : { x: 1; y: 1; }
 >x : number
 >1 : 1
 >y : number
@@ -390,7 +390,7 @@ function setState<T, K extends keyof T>(obj: T, props: Pick<T, K>) {
 let foo: Foo = { a: "hello", b: 42 };
 >foo : Foo
 >Foo : Foo
->{ a: "hello", b: 42 } : { a: string; b: number; }
+>{ a: "hello", b: 42 } : { a: "hello"; b: 42; }
 >a : string
 >"hello" : "hello"
 >b : number
@@ -400,7 +400,7 @@ setState(foo, { a: "test", b: 43 })
 >setState(foo, { a: "test", b: 43 }) : void
 >setState : <T, K extends keyof T>(obj: T, props: Pick<T, K>) => void
 >foo : Foo
->{ a: "test", b: 43 } : { a: string; b: number; }
+>{ a: "test", b: 43 } : { a: "test"; b: 43; }
 >a : string
 >"test" : "test"
 >b : number
@@ -410,7 +410,7 @@ setState(foo, { a: "hi" });
 >setState(foo, { a: "hi" }) : void
 >setState : <T, K extends keyof T>(obj: T, props: Pick<T, K>) => void
 >foo : Foo
->{ a: "hi" } : { a: string; }
+>{ a: "hi" } : { a: "hi"; }
 >a : string
 >"hi" : "hi"
 
@@ -496,7 +496,7 @@ c.setState({ a: "test", b: 43 });
 >c.setState : <K extends "a" | "b">(props: Pick<Foo, K>) => void
 >c : C<Foo>
 >setState : <K extends "a" | "b">(props: Pick<Foo, K>) => void
->{ a: "test", b: 43 } : { a: string; b: number; }
+>{ a: "test", b: 43 } : { a: "test"; b: 43; }
 >a : string
 >"test" : "test"
 >b : number
@@ -507,7 +507,7 @@ c.setState({ a: "hi" });
 >c.setState : <K extends "a" | "b">(props: Pick<Foo, K>) => void
 >c : C<Foo>
 >setState : <K extends "a" | "b">(props: Pick<Foo, K>) => void
->{ a: "hi" } : { a: string; }
+>{ a: "hi" } : { a: "hi"; }
 >a : string
 >"hi" : "hi"
 
@@ -613,7 +613,7 @@ type O = {x: number, y: boolean};
 let o: O = {x: 5, y: false};
 >o : O
 >O : O
->{x: 5, y: false} : { x: number; y: false; }
+>{x: 5, y: false} : { x: 5; y: false; }
 >x : number
 >5 : 5
 >y : boolean
@@ -623,11 +623,11 @@ let f: Foo2<O, 'x'> = {
 >f : Foo2<O, "x">
 >Foo2 : Foo2<T, F>
 >O : O
->{    pf: {x: 7},    pt: {x: 7, y: false},} : { pf: { x: number; }; pt: { x: number; y: boolean; }; }
+>{    pf: {x: 7},    pt: {x: 7, y: false},} : { pf: { x: 7; }; pt: { x: number; y: boolean; }; }
 
     pf: {x: 7},
->pf : { x: number; }
->{x: 7} : { x: number; }
+>pf : { x: 7; }
+>{x: 7} : { x: 7; }
 >x : number
 >7 : 7
 
diff --git a/tests/baselines/reference/mappedTypeInferenceErrors.errors.txt b/tests/baselines/reference/mappedTypeInferenceErrors.errors.txt
index 28bc188f7b64d..5a6c4008dfec4 100644
--- a/tests/baselines/reference/mappedTypeInferenceErrors.errors.txt
+++ b/tests/baselines/reference/mappedTypeInferenceErrors.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/types/mapped/mappedTypeInferenceErrors.ts(9,5): error TS2345: Argument of type '{ props: { x: number; y: number; }; computed: { bar(): number; baz: number; }; }' is not assignable to parameter of type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; } & ThisType<{ x: number; y: number; } & { bar: number; baz: {}; }>'.
-  Type '{ props: { x: number; y: number; }; computed: { bar(): number; baz: number; }; }' is not assignable to type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; }'.
+tests/cases/conformance/types/mapped/mappedTypeInferenceErrors.ts(9,5): error TS2345: Argument of type '{ props: { x: 10; y: 20; }; computed: { bar(): number; baz: number; }; }' is not assignable to parameter of type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; } & ThisType<{ x: number; y: number; } & { bar: number; baz: {}; }>'.
+  Type '{ props: { x: 10; y: 20; }; computed: { bar(): number; baz: number; }; }' is not assignable to type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; }'.
     Types of property 'computed' are incompatible.
       Type '{ bar(): number; baz: number; }' is not assignable to type 'ComputedOf<{ bar: number; baz: {}; }>'.
         Types of property 'baz' are incompatible.
@@ -35,8 +35,8 @@ tests/cases/conformance/types/mapped/mappedTypeInferenceErrors.ts(9,5): error TS
     ~~~~~
     });
     ~
-!!! error TS2345: Argument of type '{ props: { x: number; y: number; }; computed: { bar(): number; baz: number; }; }' is not assignable to parameter of type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; } & ThisType<{ x: number; y: number; } & { bar: number; baz: {}; }>'.
-!!! error TS2345:   Type '{ props: { x: number; y: number; }; computed: { bar(): number; baz: number; }; }' is not assignable to type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; }'.
+!!! error TS2345: Argument of type '{ props: { x: 10; y: 20; }; computed: { bar(): number; baz: number; }; }' is not assignable to parameter of type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; } & ThisType<{ x: number; y: number; } & { bar: number; baz: {}; }>'.
+!!! error TS2345:   Type '{ props: { x: 10; y: 20; }; computed: { bar(): number; baz: number; }; }' is not assignable to type '{ props: { x: number; y: number; }; computed: ComputedOf<{ bar: number; baz: {}; }>; }'.
 !!! error TS2345:     Types of property 'computed' are incompatible.
 !!! error TS2345:       Type '{ bar(): number; baz: number; }' is not assignable to type 'ComputedOf<{ bar: number; baz: {}; }>'.
 !!! error TS2345:         Types of property 'baz' are incompatible.
diff --git a/tests/baselines/reference/mappedTypeNestedGenericInstantiation.types b/tests/baselines/reference/mappedTypeNestedGenericInstantiation.types
index 7501bdb19e87d..b12cca2d42449 100644
--- a/tests/baselines/reference/mappedTypeNestedGenericInstantiation.types
+++ b/tests/baselines/reference/mappedTypeNestedGenericInstantiation.types
@@ -47,7 +47,7 @@ const v = chain({a: 1, b: 2}).mapValues(square).value();
 >chain({a: 1, b: 2}).mapValues : <U>(func: (v: number) => U) => Chainable<{ a: U; b: U; }>
 >chain({a: 1, b: 2}) : Chainable<{ a: number; b: number; }>
 >chain : <T>(t: T) => Chainable<T>
->{a: 1, b: 2} : { a: number; b: number; }
+>{a: 1, b: 2} : { a: 1; b: 2; }
 >a : number
 >1 : 1
 >b : number
diff --git a/tests/baselines/reference/mappedTypes2.types b/tests/baselines/reference/mappedTypes2.types
index 7c54fffcb08d0..370fecf7d7f11 100644
--- a/tests/baselines/reference/mappedTypes2.types
+++ b/tests/baselines/reference/mappedTypes2.types
@@ -222,7 +222,7 @@ function f0(s1: Shape, s2: Shape) {
 >assign(s1, { name: "circle" }) : void
 >assign : <T>(obj: T, props: Partial<T>) => void
 >s1 : Shape
->{ name: "circle" } : { name: string; }
+>{ name: "circle" } : { name: "circle"; }
 >name : string
 >"circle" : "circle"
 
@@ -230,7 +230,7 @@ function f0(s1: Shape, s2: Shape) {
 >assign(s2, { width: 10, height: 20 }) : void
 >assign : <T>(obj: T, props: Partial<T>) => void
 >s2 : Shape
->{ width: 10, height: 20 } : { width: number; height: number; }
+>{ width: 10, height: 20 } : { width: 10; height: 20; }
 >width : number
 >10 : 10
 >height : number
diff --git a/tests/baselines/reference/matchingOfObjectLiteralConstraints.types b/tests/baselines/reference/matchingOfObjectLiteralConstraints.types
index 76f61c978a83a..a9bef83d92517 100644
--- a/tests/baselines/reference/matchingOfObjectLiteralConstraints.types
+++ b/tests/baselines/reference/matchingOfObjectLiteralConstraints.types
@@ -13,7 +13,7 @@ function foo2<T, U extends { y: T; }>(x: U, z: T) { }
 foo2({ y: "foo" }, "foo");
 >foo2({ y: "foo" }, "foo") : void
 >foo2 : <T, U extends { y: T; }>(x: U, z: T) => void
->{ y: "foo" } : { y: string; }
+>{ y: "foo" } : { y: "foo"; }
 >y : string
 >"foo" : "foo"
 >"foo" : "foo"
diff --git a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.errors.txt b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.errors.txt
index 9b95b143d648b..6fb966e18775a 100644
--- a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.errors.txt
+++ b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/compiler/mismatchedExplicitTypeParameterAndArgumentType.ts(10,30): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-  Type 'string | number' is not assignable to type 'number'.
+tests/cases/compiler/mismatchedExplicitTypeParameterAndArgumentType.ts(10,30): error TS2345: Argument of type '(string | 1)[]' is not assignable to parameter of type 'number[]'.
+  Type 'string | 1' is not assignable to type 'number'.
     Type 'string' is not assignable to type 'number'.
 tests/cases/compiler/mismatchedExplicitTypeParameterAndArgumentType.ts(11,11): error TS2558: Expected 2 type arguments, but got 1.
 
@@ -16,8 +16,8 @@ tests/cases/compiler/mismatchedExplicitTypeParameterAndArgumentType.ts(11,11): e
     var r6 = map<Object, Object>([1, ""], (x) => x.toString());
     var r7 = map<number, string>([1, ""], (x) => x.toString()); // error
                                  ~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-!!! error TS2345:   Type 'string | number' is not assignable to type 'number'.
+!!! error TS2345: Argument of type '(string | 1)[]' is not assignable to parameter of type 'number[]'.
+!!! error TS2345:   Type 'string | 1' is not assignable to type 'number'.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
     var r7b = map<number>([1, ""], (x) => x.toString()); // error
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.types b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.types
index 8e5a4cf25de8e..649c5fa10fab2 100644
--- a/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.types
+++ b/tests/baselines/reference/mismatchedExplicitTypeParameterAndArgumentType.types
@@ -38,7 +38,7 @@ var r0 = map([1, ""], (x) => x.toString());
 >r0 : string[]
 >map([1, ""], (x) => x.toString()) : string[]
 >map : <T, U>(xs: T[], f: (x: T) => U) => U[]
->[1, ""] : (string | number)[]
+>[1, ""] : (1 | "")[]
 >1 : 1
 >"" : ""
 >(x) => x.toString() : (x: string | number) => string
diff --git a/tests/baselines/reference/missingAndExcessProperties.types b/tests/baselines/reference/missingAndExcessProperties.types
index 4a8f598725bbf..0fe5833d7e349 100644
--- a/tests/baselines/reference/missingAndExcessProperties.types
+++ b/tests/baselines/reference/missingAndExcessProperties.types
@@ -137,34 +137,34 @@ function f4() {
 >0 : 0
 
     ({ x } = { x: 0, y: 0 });
->({ x } = { x: 0, y: 0 }) : { x: number; y: number; }
->{ x } = { x: 0, y: 0 } : { x: number; y: number; }
+>({ x } = { x: 0, y: 0 }) : { x: 0; y: number; }
+>{ x } = { x: 0, y: 0 } : { x: 0; y: number; }
 >{ x } : { x: number; }
 >x : number
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: number; }
 >x : number
 >0 : 0
 >y : number
 >0 : 0
 
     ({ y } = { x: 0, y: 0 });
->({ y } = { x: 0, y: 0 }) : { x: number; y: number; }
->{ y } = { x: 0, y: 0 } : { x: number; y: number; }
+>({ y } = { x: 0, y: 0 }) : { x: number; y: 0; }
+>{ y } = { x: 0, y: 0 } : { x: number; y: 0; }
 >{ y } : { y: number; }
 >y : number
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: number; y: 0; }
 >x : number
 >0 : 0
 >y : number
 >0 : 0
 
     ({ x, y } = { x: 0, y: 0 });
->({ x, y } = { x: 0, y: 0 }) : { x: number; y: number; }
->{ x, y } = { x: 0, y: 0 } : { x: number; y: number; }
+>({ x, y } = { x: 0, y: 0 }) : { x: 0; y: 0; }
+>{ x, y } = { x: 0, y: 0 } : { x: 0; y: 0; }
 >{ x, y } : { x: number; y: number; }
 >x : number
 >y : number
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/multipleInheritance.types b/tests/baselines/reference/multipleInheritance.types
index dedde8a154e4e..5e6f8d54294ac 100644
--- a/tests/baselines/reference/multipleInheritance.types
+++ b/tests/baselines/reference/multipleInheritance.types
@@ -55,7 +55,7 @@ class Good {
 
     public f:() => number = function() { return 0; }
 >f : () => number
->function() { return 0; } : () => number
+>function() { return 0; } : () => 0
 >0 : 0
 
     public g() { return 0; }
diff --git a/tests/baselines/reference/multipleNumericIndexers.types b/tests/baselines/reference/multipleNumericIndexers.types
index a9da566aae772..bc68d40eae64d 100644
--- a/tests/baselines/reference/multipleNumericIndexers.types
+++ b/tests/baselines/reference/multipleNumericIndexers.types
@@ -41,7 +41,7 @@ var b: {
 >x : number
 
 } = { 1: '', "2": '' }
->{ 1: '', "2": '' } : { 1: string; "2": string; }
+>{ 1: '', "2": '' } : { 1: ""; "2": ""; }
 >'' : ""
 >'' : ""
 
diff --git a/tests/baselines/reference/multipleStringIndexers.types b/tests/baselines/reference/multipleStringIndexers.types
index 96d7b4e0e7029..5a5eaee5ccd3d 100644
--- a/tests/baselines/reference/multipleStringIndexers.types
+++ b/tests/baselines/reference/multipleStringIndexers.types
@@ -41,7 +41,7 @@ var b: {
 >x : string
 
 } = { y: '' }
->{ y: '' } : { y: string; }
+>{ y: '' } : { y: ""; }
 >y : string
 >'' : ""
 
diff --git a/tests/baselines/reference/negateOperatorWithNumberType.types b/tests/baselines/reference/negateOperatorWithNumberType.types
index d3d9b47463794..084f3c1e55170 100644
--- a/tests/baselines/reference/negateOperatorWithNumberType.types
+++ b/tests/baselines/reference/negateOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/negateOperatorWithStringType.types b/tests/baselines/reference/negateOperatorWithStringType.types
index 053fd1138018c..99b1447a581f9 100644
--- a/tests/baselines/reference/negateOperatorWithStringType.types
+++ b/tests/baselines/reference/negateOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/nestedLoops.types b/tests/baselines/reference/nestedLoops.types
index f4a743f4aaf84..659ce0ea453cc 100644
--- a/tests/baselines/reference/nestedLoops.types
+++ b/tests/baselines/reference/nestedLoops.types
@@ -7,7 +7,7 @@ export class Test  {
         let outerArray: Array<number> = [1, 2, 3];
 >outerArray : number[]
 >Array : T[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -15,7 +15,7 @@ export class Test  {
         let innerArray: Array<number> = [1, 2, 3];
 >innerArray : number[]
 >Array : T[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/nestedModules.types b/tests/baselines/reference/nestedModules.types
index 95f6ae406696f..6ab4dd2afbbe4 100644
--- a/tests/baselines/reference/nestedModules.types
+++ b/tests/baselines/reference/nestedModules.types
@@ -25,7 +25,7 @@ module A {
 >Point : C.Point
 >C : any
 >Point : C.Point
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/nestedTypeVariableInfersLiteral.js b/tests/baselines/reference/nestedTypeVariableInfersLiteral.js
new file mode 100644
index 0000000000000..119dde5fa76b4
--- /dev/null
+++ b/tests/baselines/reference/nestedTypeVariableInfersLiteral.js
@@ -0,0 +1,31 @@
+//// [nestedTypeVariableInfersLiteral.ts]
+// https://github.com/Microsoft/TypeScript/issues/19632
+declare function direct<A extends string>(a: A | A[]): Record<A, string>
+declare function nested<A extends string>(a: { fields: A }): Record<A, string>
+declare function nestedUnion<A extends string>(a: { fields: A | A[] }): Record<A, string>
+
+const directUnionSingle = direct("z")
+const directUnionArray = direct(["z", "y"])
+const nestedSingle = nested({fields: "z"})
+const nestedUnionSingle = nestedUnion({fields: "z"})
+const nestedUnionArray = nestedUnion({fields: ["z", "y"]})
+
+declare function hasZField(arg: { z: string }): void
+
+hasZField(directUnionSingle) // ok
+hasZField(directUnionArray) // ok
+hasZField(nestedSingle) // ok
+hasZField(nestedUnionSingle) // ok
+hasZField(nestedUnionArray) // ok
+
+//// [nestedTypeVariableInfersLiteral.js]
+var directUnionSingle = direct("z");
+var directUnionArray = direct(["z", "y"]);
+var nestedSingle = nested({ fields: "z" });
+var nestedUnionSingle = nestedUnion({ fields: "z" });
+var nestedUnionArray = nestedUnion({ fields: ["z", "y"] });
+hasZField(directUnionSingle); // ok
+hasZField(directUnionArray); // ok
+hasZField(nestedSingle); // ok
+hasZField(nestedUnionSingle); // ok
+hasZField(nestedUnionArray); // ok
diff --git a/tests/baselines/reference/nestedTypeVariableInfersLiteral.symbols b/tests/baselines/reference/nestedTypeVariableInfersLiteral.symbols
new file mode 100644
index 0000000000000..ce9e4915e3f06
--- /dev/null
+++ b/tests/baselines/reference/nestedTypeVariableInfersLiteral.symbols
@@ -0,0 +1,78 @@
+=== tests/cases/compiler/nestedTypeVariableInfersLiteral.ts ===
+// https://github.com/Microsoft/TypeScript/issues/19632
+declare function direct<A extends string>(a: A | A[]): Record<A, string>
+>direct : Symbol(direct, Decl(nestedTypeVariableInfersLiteral.ts, 0, 0))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 1, 24))
+>a : Symbol(a, Decl(nestedTypeVariableInfersLiteral.ts, 1, 42))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 1, 24))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 1, 24))
+>Record : Symbol(Record, Decl(lib.d.ts, --, --))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 1, 24))
+
+declare function nested<A extends string>(a: { fields: A }): Record<A, string>
+>nested : Symbol(nested, Decl(nestedTypeVariableInfersLiteral.ts, 1, 72))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 2, 24))
+>a : Symbol(a, Decl(nestedTypeVariableInfersLiteral.ts, 2, 42))
+>fields : Symbol(fields, Decl(nestedTypeVariableInfersLiteral.ts, 2, 46))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 2, 24))
+>Record : Symbol(Record, Decl(lib.d.ts, --, --))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 2, 24))
+
+declare function nestedUnion<A extends string>(a: { fields: A | A[] }): Record<A, string>
+>nestedUnion : Symbol(nestedUnion, Decl(nestedTypeVariableInfersLiteral.ts, 2, 78))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 3, 29))
+>a : Symbol(a, Decl(nestedTypeVariableInfersLiteral.ts, 3, 47))
+>fields : Symbol(fields, Decl(nestedTypeVariableInfersLiteral.ts, 3, 51))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 3, 29))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 3, 29))
+>Record : Symbol(Record, Decl(lib.d.ts, --, --))
+>A : Symbol(A, Decl(nestedTypeVariableInfersLiteral.ts, 3, 29))
+
+const directUnionSingle = direct("z")
+>directUnionSingle : Symbol(directUnionSingle, Decl(nestedTypeVariableInfersLiteral.ts, 5, 5))
+>direct : Symbol(direct, Decl(nestedTypeVariableInfersLiteral.ts, 0, 0))
+
+const directUnionArray = direct(["z", "y"])
+>directUnionArray : Symbol(directUnionArray, Decl(nestedTypeVariableInfersLiteral.ts, 6, 5))
+>direct : Symbol(direct, Decl(nestedTypeVariableInfersLiteral.ts, 0, 0))
+
+const nestedSingle = nested({fields: "z"})
+>nestedSingle : Symbol(nestedSingle, Decl(nestedTypeVariableInfersLiteral.ts, 7, 5))
+>nested : Symbol(nested, Decl(nestedTypeVariableInfersLiteral.ts, 1, 72))
+>fields : Symbol(fields, Decl(nestedTypeVariableInfersLiteral.ts, 7, 29))
+
+const nestedUnionSingle = nestedUnion({fields: "z"})
+>nestedUnionSingle : Symbol(nestedUnionSingle, Decl(nestedTypeVariableInfersLiteral.ts, 8, 5))
+>nestedUnion : Symbol(nestedUnion, Decl(nestedTypeVariableInfersLiteral.ts, 2, 78))
+>fields : Symbol(fields, Decl(nestedTypeVariableInfersLiteral.ts, 8, 39))
+
+const nestedUnionArray = nestedUnion({fields: ["z", "y"]})
+>nestedUnionArray : Symbol(nestedUnionArray, Decl(nestedTypeVariableInfersLiteral.ts, 9, 5))
+>nestedUnion : Symbol(nestedUnion, Decl(nestedTypeVariableInfersLiteral.ts, 2, 78))
+>fields : Symbol(fields, Decl(nestedTypeVariableInfersLiteral.ts, 9, 38))
+
+declare function hasZField(arg: { z: string }): void
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>arg : Symbol(arg, Decl(nestedTypeVariableInfersLiteral.ts, 11, 27))
+>z : Symbol(z, Decl(nestedTypeVariableInfersLiteral.ts, 11, 33))
+
+hasZField(directUnionSingle) // ok
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>directUnionSingle : Symbol(directUnionSingle, Decl(nestedTypeVariableInfersLiteral.ts, 5, 5))
+
+hasZField(directUnionArray) // ok
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>directUnionArray : Symbol(directUnionArray, Decl(nestedTypeVariableInfersLiteral.ts, 6, 5))
+
+hasZField(nestedSingle) // ok
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>nestedSingle : Symbol(nestedSingle, Decl(nestedTypeVariableInfersLiteral.ts, 7, 5))
+
+hasZField(nestedUnionSingle) // ok
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>nestedUnionSingle : Symbol(nestedUnionSingle, Decl(nestedTypeVariableInfersLiteral.ts, 8, 5))
+
+hasZField(nestedUnionArray) // ok
+>hasZField : Symbol(hasZField, Decl(nestedTypeVariableInfersLiteral.ts, 9, 58))
+>nestedUnionArray : Symbol(nestedUnionArray, Decl(nestedTypeVariableInfersLiteral.ts, 9, 5))
+
diff --git a/tests/baselines/reference/nestedTypeVariableInfersLiteral.types b/tests/baselines/reference/nestedTypeVariableInfersLiteral.types
new file mode 100644
index 0000000000000..ed52dbb41b5b3
--- /dev/null
+++ b/tests/baselines/reference/nestedTypeVariableInfersLiteral.types
@@ -0,0 +1,100 @@
+=== tests/cases/compiler/nestedTypeVariableInfersLiteral.ts ===
+// https://github.com/Microsoft/TypeScript/issues/19632
+declare function direct<A extends string>(a: A | A[]): Record<A, string>
+>direct : <A extends string>(a: A | A[]) => Record<A, string>
+>A : A
+>a : A | A[]
+>A : A
+>A : A
+>Record : Record<K, T>
+>A : A
+
+declare function nested<A extends string>(a: { fields: A }): Record<A, string>
+>nested : <A extends string>(a: { fields: A; }) => Record<A, string>
+>A : A
+>a : { fields: A; }
+>fields : A
+>A : A
+>Record : Record<K, T>
+>A : A
+
+declare function nestedUnion<A extends string>(a: { fields: A | A[] }): Record<A, string>
+>nestedUnion : <A extends string>(a: { fields: A | A[]; }) => Record<A, string>
+>A : A
+>a : { fields: A | A[]; }
+>fields : A | A[]
+>A : A
+>A : A
+>Record : Record<K, T>
+>A : A
+
+const directUnionSingle = direct("z")
+>directUnionSingle : Record<"z", string>
+>direct("z") : Record<"z", string>
+>direct : <A extends string>(a: A | A[]) => Record<A, string>
+>"z" : "z"
+
+const directUnionArray = direct(["z", "y"])
+>directUnionArray : Record<"z" | "y", string>
+>direct(["z", "y"]) : Record<"z" | "y", string>
+>direct : <A extends string>(a: A | A[]) => Record<A, string>
+>["z", "y"] : ("z" | "y")[]
+>"z" : "z"
+>"y" : "y"
+
+const nestedSingle = nested({fields: "z"})
+>nestedSingle : Record<"z", string>
+>nested({fields: "z"}) : Record<"z", string>
+>nested : <A extends string>(a: { fields: A; }) => Record<A, string>
+>{fields: "z"} : { fields: "z"; }
+>fields : string
+>"z" : "z"
+
+const nestedUnionSingle = nestedUnion({fields: "z"})
+>nestedUnionSingle : Record<"z", string>
+>nestedUnion({fields: "z"}) : Record<"z", string>
+>nestedUnion : <A extends string>(a: { fields: A | A[]; }) => Record<A, string>
+>{fields: "z"} : { fields: "z"; }
+>fields : string
+>"z" : "z"
+
+const nestedUnionArray = nestedUnion({fields: ["z", "y"]})
+>nestedUnionArray : Record<"z" | "y", string>
+>nestedUnion({fields: ["z", "y"]}) : Record<"z" | "y", string>
+>nestedUnion : <A extends string>(a: { fields: A | A[]; }) => Record<A, string>
+>{fields: ["z", "y"]} : { fields: ("z" | "y")[]; }
+>fields : ("z" | "y")[]
+>["z", "y"] : ("z" | "y")[]
+>"z" : "z"
+>"y" : "y"
+
+declare function hasZField(arg: { z: string }): void
+>hasZField : (arg: { z: string; }) => void
+>arg : { z: string; }
+>z : string
+
+hasZField(directUnionSingle) // ok
+>hasZField(directUnionSingle) : void
+>hasZField : (arg: { z: string; }) => void
+>directUnionSingle : Record<"z", string>
+
+hasZField(directUnionArray) // ok
+>hasZField(directUnionArray) : void
+>hasZField : (arg: { z: string; }) => void
+>directUnionArray : Record<"z" | "y", string>
+
+hasZField(nestedSingle) // ok
+>hasZField(nestedSingle) : void
+>hasZField : (arg: { z: string; }) => void
+>nestedSingle : Record<"z", string>
+
+hasZField(nestedUnionSingle) // ok
+>hasZField(nestedUnionSingle) : void
+>hasZField : (arg: { z: string; }) => void
+>nestedUnionSingle : Record<"z", string>
+
+hasZField(nestedUnionArray) // ok
+>hasZField(nestedUnionArray) : void
+>hasZField : (arg: { z: string; }) => void
+>nestedUnionArray : Record<"z" | "y", string>
+
diff --git a/tests/baselines/reference/neverInference.types b/tests/baselines/reference/neverInference.types
index 2f4b9e0cc1e23..372e837ecc1f0 100644
--- a/tests/baselines/reference/neverInference.types
+++ b/tests/baselines/reference/neverInference.types
@@ -103,7 +103,7 @@ f2(Array.from([0]), [], (a1, a2) => a1 - a2);
 >Array.from : { <T>(iterable: Iterable<T>): T[]; <T, U>(iterable: Iterable<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; <T>(arrayLike: ArrayLike<T>): T[]; <T, U>(arrayLike: ArrayLike<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; }
 >Array : ArrayConstructor
 >from : { <T>(iterable: Iterable<T>): T[]; <T, U>(iterable: Iterable<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; <T>(arrayLike: ArrayLike<T>): T[]; <T, U>(arrayLike: ArrayLike<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; }
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 >[] : never[]
 >(a1, a2) => a1 - a2 : (a1: number, a2: number) => number
@@ -121,7 +121,7 @@ f2(Array.from([]), [0], (a1, a2) => a1 - a2);
 >Array : ArrayConstructor
 >from : { <T>(iterable: Iterable<T>): T[]; <T, U>(iterable: Iterable<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; <T>(arrayLike: ArrayLike<T>): T[]; <T, U>(arrayLike: ArrayLike<T>, mapfn: (v: T, k: number) => U, thisArg?: any): U[]; }
 >[] : never[]
->[0] : number[]
+>[0] : 0[]
 >0 : 0
 >(a1, a2) => a1 - a2 : (a1: number, a2: number) => number
 >a1 : number
diff --git a/tests/baselines/reference/neverType.types b/tests/baselines/reference/neverType.types
index efedf4629ac7e..0af3e391dcbd9 100644
--- a/tests/baselines/reference/neverType.types
+++ b/tests/baselines/reference/neverType.types
@@ -213,7 +213,7 @@ let errorCallback = () => error("Error callback");
 test(() => "hello");
 >test(() => "hello") : string
 >test : (cb: () => string) => string
->() => "hello" : () => string
+>() => "hello" : () => "hello"
 >"hello" : "hello"
 
 test(() => fail());
diff --git a/tests/baselines/reference/noCrashOnImportShadowing.types b/tests/baselines/reference/noCrashOnImportShadowing.types
index 6a09ba44e491b..df35e567ebdf2 100644
--- a/tests/baselines/reference/noCrashOnImportShadowing.types
+++ b/tests/baselines/reference/noCrashOnImportShadowing.types
@@ -17,7 +17,7 @@ interface B {
 const x: B = { x: "" };
 >x : B
 >B : B
->{ x: "" } : { x: string; }
+>{ x: "" } : { x: ""; }
 >x : string
 >"" : ""
 
@@ -36,7 +36,7 @@ import { B } from "./a";
 const x: B = { x: "" };
 >x : B
 >B : B
->{ x: "" } : { x: string; }
+>{ x: "" } : { x: ""; }
 >x : string
 >"" : ""
 
diff --git a/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration2.types b/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration2.types
index c494d0795dd55..6b4e4e3c59776 100644
--- a/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration2.types
+++ b/tests/baselines/reference/noImplicitAnyDestructuringVarDeclaration2.types
@@ -15,7 +15,7 @@ let [a1 = 10, b1 = 10, c1 = 10] = [1, 2, 3]; // no error
 >10 : 10
 >c1 : number
 >10 : 10
->[1, 2, 3] : [number, number, number]
+>[1, 2, 3] : [1, 2, 3]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -82,7 +82,7 @@ let {x1 = 10, y1 = 10, z1 = 10} = { x1: 1, y1: 2, z1: 3 }; // no error
 >10 : 10
 >z1 : number
 >10 : 10
->{ x1: 1, y1: 2, z1: 3 } : { x1?: number; y1?: number; z1?: number; }
+>{ x1: 1, y1: 2, z1: 3 } : { x1?: 1; y1?: 2; z1?: 3; }
 >x1 : number
 >1 : 1
 >y1 : number
diff --git a/tests/baselines/reference/noImplicitAnyInCastExpression.types b/tests/baselines/reference/noImplicitAnyInCastExpression.types
index 12faca069f0d8..cd29e0e65f461 100644
--- a/tests/baselines/reference/noImplicitAnyInCastExpression.types
+++ b/tests/baselines/reference/noImplicitAnyInCastExpression.types
@@ -25,7 +25,7 @@ interface IFoo {
 >(<IFoo>{ a: 2, b: undefined }) : IFoo
 ><IFoo>{ a: 2, b: undefined } : IFoo
 >IFoo : IFoo
->{ a: 2, b: undefined } : { a: number; b: undefined; }
+>{ a: 2, b: undefined } : { a: 2; b: undefined; }
 >a : number
 >2 : 2
 >b : undefined
diff --git a/tests/baselines/reference/noImplicitAnyIndexing.types b/tests/baselines/reference/noImplicitAnyIndexing.types
index 06aa1a4a2e08d..ea200c1a2807f 100644
--- a/tests/baselines/reference/noImplicitAnyIndexing.types
+++ b/tests/baselines/reference/noImplicitAnyIndexing.types
@@ -87,7 +87,7 @@ interface MyMap<T> {
 var m: MyMap<number> = {
 >m : MyMap<number>
 >MyMap : MyMap<T>
->{    "0": 0,    "1": 1,    "2": 2,    "Okay that's enough for today.": NaN} : { "0": number; "1": number; "2": number; "Okay that's enough for today.": number; }
+>{    "0": 0,    "1": 1,    "2": 2,    "Okay that's enough for today.": NaN} : { "0": 0; "1": 1; "2": 2; "Okay that's enough for today.": number; }
 
     "0": 0,
 >0 : 0
diff --git a/tests/baselines/reference/noImplicitAnyIndexingSuppressed.types b/tests/baselines/reference/noImplicitAnyIndexingSuppressed.types
index 18c10871cf039..28d38778cf0e9 100644
--- a/tests/baselines/reference/noImplicitAnyIndexingSuppressed.types
+++ b/tests/baselines/reference/noImplicitAnyIndexingSuppressed.types
@@ -86,7 +86,7 @@ interface MyMap<T> {
 var m: MyMap<number> = {
 >m : MyMap<number>
 >MyMap : MyMap<T>
->{    "0": 0,    "1": 1,    "2": 2,    "Okay that's enough for today.": NaN} : { "0": number; "1": number; "2": number; "Okay that's enough for today.": number; }
+>{    "0": 0,    "1": 1,    "2": 2,    "Okay that's enough for today.": NaN} : { "0": 0; "1": 1; "2": 2; "Okay that's enough for today.": number; }
 
     "0": 0,
 >0 : 0
diff --git a/tests/baselines/reference/nonInstantiatedModule.types b/tests/baselines/reference/nonInstantiatedModule.types
index 97231a5e2c60c..b3e2f6b061ed5 100644
--- a/tests/baselines/reference/nonInstantiatedModule.types
+++ b/tests/baselines/reference/nonInstantiatedModule.types
@@ -50,7 +50,7 @@ module M2 {
 >Point : Point
 
             return { x: 0, y: 0 };
->{ x: 0, y: 0 } : { x: number; y: number; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
diff --git a/tests/baselines/reference/null.types b/tests/baselines/reference/null.types
index 0e8bf9e799bc0..26a7f21188676 100644
--- a/tests/baselines/reference/null.types
+++ b/tests/baselines/reference/null.types
@@ -49,7 +49,7 @@ interface I {
 var w:I={x:null,y:3};
 >w : I
 >I : I
->{x:null,y:3} : { x: null; y: number; }
+>{x:null,y:3} : { x: null; y: 3; }
 >x : null
 >null : null
 >y : number
diff --git a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
index f532bd237559d..d6509f6ce4b9d 100644
--- a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
+++ b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
@@ -5,7 +5,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(36,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(50,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(68,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(79,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(79,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: ""; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
   Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(88,9): error TS2304: Cannot find name 'Myn'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -107,7 +107,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
     var b: { [x: number]: string; } = {
         a: '',
         ~~~~~
-!!! error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
+!!! error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: ""; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
         b: 1, 
         c: () => { }, 
diff --git a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.types b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.types
index 06d6dfdf8c7d9..e3292a46c1124 100644
--- a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.types
+++ b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.types
@@ -139,7 +139,7 @@ var a: {
 var b: { [x: number]: string; } = {
 >b : { [x: number]: string; }
 >x : number
->{    a: '',    b: 1,     c: () => { },     "d": '',     "e": 1,     1.0: '',    2.0: 1,     "3.0": '',     "4.0": 1,     f: <Myn>null,     get X() {         return '';    },    set X(v) { },     foo() {         return '';    }} : { a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }
+>{    a: '',    b: 1,     c: () => { },     "d": '',     "e": 1,     1.0: '',    2.0: 1,     "3.0": '',     "4.0": 1,     f: <Myn>null,     get X() {         return '';    },    set X(v) { },     foo() {         return '';    }} : { a: string; b: number; c: () => void; "d": string; "e": number; 1.0: ""; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }
 
     a: '',
 >a : string
diff --git a/tests/baselines/reference/numericIndexingResults.types b/tests/baselines/reference/numericIndexingResults.types
index 8d25a44eab0db..a7a1be684b33e 100644
--- a/tests/baselines/reference/numericIndexingResults.types
+++ b/tests/baselines/reference/numericIndexingResults.types
@@ -151,7 +151,7 @@ var r6 = a[3];
 var b: { [x: number]: string } = { 1: '', "2": '' }
 >b : { [x: number]: string; }
 >x : number
->{ 1: '', "2": '' } : { 1: string; "2": string; }
+>{ 1: '', "2": '' } : { 1: ""; "2": ""; }
 >'' : ""
 >'' : ""
 
@@ -194,7 +194,7 @@ var r6 = b[3];
 var b2: { [x: number]: string; 1: string; "2": string; } = { 1: '', "2": '' }
 >b2 : { [x: number]: string; 1: string; "2": string; }
 >x : number
->{ 1: '', "2": '' } : { 1: string; "2": string; }
+>{ 1: '', "2": '' } : { 1: ""; "2": ""; }
 >'' : ""
 >'' : ""
 
diff --git a/tests/baselines/reference/objectFreeze.types b/tests/baselines/reference/objectFreeze.types
index b673d513e8561..551ac41594a20 100644
--- a/tests/baselines/reference/objectFreeze.types
+++ b/tests/baselines/reference/objectFreeze.types
@@ -42,7 +42,7 @@ const a = Object.freeze([1, 2, 3]);
 >Object.freeze : { <T>(a: T[]): ReadonlyArray<T>; <T extends Function>(f: T): T; <T>(o: T): Readonly<T>; }
 >Object : ObjectConstructor
 >freeze : { <T>(a: T[]): ReadonlyArray<T>; <T extends Function>(f: T): T; <T>(o: T): Readonly<T>; }
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -65,7 +65,7 @@ const o = Object.freeze({ a: 1, b: "string" });
 >Object.freeze : { <T>(a: T[]): ReadonlyArray<T>; <T extends Function>(f: T): T; <T>(o: T): Readonly<T>; }
 >Object : ObjectConstructor
 >freeze : { <T>(a: T[]): ReadonlyArray<T>; <T extends Function>(f: T): T; <T>(o: T): Readonly<T>; }
->{ a: 1, b: "string" } : { a: number; b: string; }
+>{ a: 1, b: "string" } : { a: 1; b: "string"; }
 >a : number
 >1 : 1
 >b : string
diff --git a/tests/baselines/reference/objectLitTargetTypeCallSite.errors.txt b/tests/baselines/reference/objectLitTargetTypeCallSite.errors.txt
index 0d064af393527..8f3857549a6ef 100644
--- a/tests/baselines/reference/objectLitTargetTypeCallSite.errors.txt
+++ b/tests/baselines/reference/objectLitTargetTypeCallSite.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/objectLitTargetTypeCallSite.ts(5,9): error TS2345: Argument of type '{ a: boolean; b: string; }' is not assignable to parameter of type '{ a: number; b: string; }'.
+tests/cases/compiler/objectLitTargetTypeCallSite.ts(5,9): error TS2345: Argument of type '{ a: boolean; b: "y"; }' is not assignable to parameter of type '{ a: number; b: string; }'.
   Types of property 'a' are incompatible.
     Type 'boolean' is not assignable to type 'number'.
 
@@ -10,6 +10,6 @@ tests/cases/compiler/objectLitTargetTypeCallSite.ts(5,9): error TS2345: Argument
     
     process({a:true,b:"y"});
             ~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ a: boolean; b: string; }' is not assignable to parameter of type '{ a: number; b: string; }'.
+!!! error TS2345: Argument of type '{ a: boolean; b: "y"; }' is not assignable to parameter of type '{ a: number; b: string; }'.
 !!! error TS2345:   Types of property 'a' are incompatible.
 !!! error TS2345:     Type 'boolean' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralArraySpecialization.types b/tests/baselines/reference/objectLiteralArraySpecialization.types
index d51b7ffc3cf2e..1f4096910d2d8 100644
--- a/tests/baselines/reference/objectLiteralArraySpecialization.types
+++ b/tests/baselines/reference/objectLiteralArraySpecialization.types
@@ -28,13 +28,13 @@ var thing = create([ { name: "bob", id: 24 }, { name: "doug", id: 32 } ]); // sh
 >thing : MyArrayWrapper<{ name: string; id: number; }>
 >create([ { name: "bob", id: 24 }, { name: "doug", id: 32 } ]) : MyArrayWrapper<{ name: string; id: number; }>
 >create : <T>(initialValues?: T[]) => MyArrayWrapper<T>
->[ { name: "bob", id: 24 }, { name: "doug", id: 32 } ] : { name: string; id: number; }[]
->{ name: "bob", id: 24 } : { name: string; id: number; }
+>[ { name: "bob", id: 24 }, { name: "doug", id: 32 } ] : ({ name: "bob"; id: 24; } | { name: "doug"; id: 32; })[]
+>{ name: "bob", id: 24 } : { name: "bob"; id: 24; }
 >name : string
 >"bob" : "bob"
 >id : number
 >24 : 24
->{ name: "doug", id: 32 } : { name: string; id: number; }
+>{ name: "doug", id: 32 } : { name: "doug"; id: 32; }
 >name : string
 >"doug" : "doug"
 >id : number
diff --git a/tests/baselines/reference/objectLiteralContextualTyping.types b/tests/baselines/reference/objectLiteralContextualTyping.types
index a0c6ff7417b07..7162685b17ac3 100644
--- a/tests/baselines/reference/objectLiteralContextualTyping.types
+++ b/tests/baselines/reference/objectLiteralContextualTyping.types
@@ -27,7 +27,7 @@ var x = foo({ name: "Sprocket" });
 >x : string
 >foo({ name: "Sprocket" }) : string
 >foo : { (item: Item): string; (item: any): number; }
->{ name: "Sprocket" } : { name: string; }
+>{ name: "Sprocket" } : { name: "Sprocket"; }
 >name : string
 >"Sprocket" : "Sprocket"
 
@@ -38,7 +38,7 @@ var y = foo({ name: "Sprocket", description: "Bumpy wheel" });
 >y : string
 >foo({ name: "Sprocket", description: "Bumpy wheel" }) : string
 >foo : { (item: Item): string; (item: any): number; }
->{ name: "Sprocket", description: "Bumpy wheel" } : { name: string; description: string; }
+>{ name: "Sprocket", description: "Bumpy wheel" } : { name: "Sprocket"; description: "Bumpy wheel"; }
 >name : string
 >"Sprocket" : "Sprocket"
 >description : string
diff --git a/tests/baselines/reference/objectLiteralEnumPropertyNames.types b/tests/baselines/reference/objectLiteralEnumPropertyNames.types
index 460d96bc56dcf..35c3ab0e8cf9c 100644
--- a/tests/baselines/reference/objectLiteralEnumPropertyNames.types
+++ b/tests/baselines/reference/objectLiteralEnumPropertyNames.types
@@ -19,7 +19,7 @@ type TestStrs = { [key in Strs]: string }
 const x: TestStrs = {
 >x : TestStrs
 >TestStrs : TestStrs
->{    [Strs.A]: 'xo',    [Strs.B]: 'xe'} : { [Strs.A]: string; [Strs.B]: string; }
+>{    [Strs.A]: 'xo',    [Strs.B]: 'xe'} : { [Strs.A]: "xo"; [Strs.B]: "xe"; }
 
     [Strs.A]: 'xo',
 >Strs.A : Strs.A
@@ -52,7 +52,7 @@ const ux = {
 const y: TestStrs = {
 >y : TestStrs
 >TestStrs : TestStrs
->{    ['a']: 'yo',    ['b']: 'ye'} : { ['a']: string; ['b']: string; }
+>{    ['a']: 'yo',    ['b']: 'ye'} : { ['a']: "yo"; ['b']: "ye"; }
 
     ['a']: 'yo',
 >'a' : "a"
@@ -73,7 +73,7 @@ const b = 'b';
 const z: TestStrs = {
 >z : TestStrs
 >TestStrs : TestStrs
->{    [a]: 'zo',    [b]: 'ze'} : { [a]: string; [b]: string; }
+>{    [a]: 'zo',    [b]: 'ze'} : { [a]: "zo"; [b]: "ze"; }
 
     [a]: 'zo',
 >a : "a"
@@ -111,7 +111,7 @@ type TestNums = { 0: number, 1: number }
 const n: TestNums = {
 >n : TestNums
 >TestNums : TestNums
->{    [Nums.A]: 1,    [Nums.B]: 2} : { [Nums.A]: number; [Nums.B]: number; }
+>{    [Nums.A]: 1,    [Nums.B]: 2} : { [Nums.A]: 1; [Nums.B]: 2; }
 
     [Nums.A]: 1,
 >Nums.A : Nums.A
@@ -152,7 +152,7 @@ const bn = 1;
 const m: TestNums = {
 >m : TestNums
 >TestNums : TestNums
->{    [an]: 5,    [bn]: 6} : { [an]: number; [bn]: number; }
+>{    [an]: 5,    [bn]: 6} : { [an]: 5; [bn]: 6; }
 
     [an]: 5,
 >an : 0
diff --git a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
index 0c5909dc4ed45..a7c07fd61bce0 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
+++ b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
@@ -2,18 +2,18 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(9,18): error TS2322: Type
   Object literal may only specify known properties, but 'forword' does not exist in type 'Book'. Did you mean to write 'foreword'?
 tests/cases/compiler/objectLiteralExcessProperties.ts(11,27): error TS2322: Type '{ foreward: string; }' is not assignable to type 'string | Book'.
   Object literal may only specify known properties, and 'foreward' does not exist in type 'string | Book'.
-tests/cases/compiler/objectLiteralExcessProperties.ts(13,53): error TS2322: Type '({ foreword: string; } | { forwards: string; })[]' is not assignable to type 'Book | Book[]'.
-  Type '({ foreword: string; } | { forwards: string; })[]' is not assignable to type 'Book[]'.
-    Type '{ foreword: string; } | { forwards: string; }' is not assignable to type 'Book'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(13,53): error TS2322: Type '({ foreword: "hello"; } | { forwards: string; })[]' is not assignable to type 'Book | Book[]'.
+  Type '({ foreword: "hello"; } | { forwards: string; })[]' is not assignable to type 'Book[]'.
+    Type '{ foreword: "hello"; } | { forwards: string; }' is not assignable to type 'Book'.
       Type '{ forwards: string; }' is not assignable to type 'Book'.
         Object literal may only specify known properties, and 'forwards' does not exist in type 'Book'.
-tests/cases/compiler/objectLiteralExcessProperties.ts(15,42): error TS2322: Type '{ foreword: string; colour: string; }' is not assignable to type 'Book & Cover'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(15,42): error TS2322: Type '{ foreword: "hi"; colour: string; }' is not assignable to type 'Book & Cover'.
   Object literal may only specify known properties, but 'colour' does not exist in type 'Book & Cover'. Did you mean to write 'color'?
-tests/cases/compiler/objectLiteralExcessProperties.ts(17,26): error TS2322: Type '{ foreward: string; color: string; }' is not assignable to type 'Book & Cover'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(17,26): error TS2322: Type '{ foreward: string; color: "blue"; }' is not assignable to type 'Book & Cover'.
   Object literal may only specify known properties, but 'foreward' does not exist in type 'Book & Cover'. Did you mean to write 'foreword'?
-tests/cases/compiler/objectLiteralExcessProperties.ts(19,57): error TS2322: Type '{ foreword: string; color: string; price: number; }' is not assignable to type 'Book & Cover'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(19,57): error TS2322: Type '{ foreword: "hi"; color: "blue"; price: number; }' is not assignable to type 'Book & Cover'.
   Object literal may only specify known properties, and 'price' does not exist in type 'Book & Cover'.
-tests/cases/compiler/objectLiteralExcessProperties.ts(21,43): error TS2322: Type '{ foreword: string; price: number; }' is not assignable to type 'Book & number'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(21,43): error TS2322: Type '{ foreword: "hi"; price: number; }' is not assignable to type 'Book & number'.
   Object literal may only specify known properties, and 'price' does not exist in type 'Book & number'.
 tests/cases/compiler/objectLiteralExcessProperties.ts(23,29): error TS2322: Type '{ couleur: string; }' is not assignable to type 'Cover | Cover[]'.
   Object literal may only specify known properties, and 'couleur' does not exist in type 'Cover | Cover[]'.
@@ -46,30 +46,30 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(33,27): error TS2322: Type
     
     var b3: Book | (Book[]) = [{ foreword: "hello" }, { forwards: "back" }];
                                                         ~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '({ foreword: string; } | { forwards: string; })[]' is not assignable to type 'Book | Book[]'.
-!!! error TS2322:   Type '({ foreword: string; } | { forwards: string; })[]' is not assignable to type 'Book[]'.
-!!! error TS2322:     Type '{ foreword: string; } | { forwards: string; }' is not assignable to type 'Book'.
+!!! error TS2322: Type '({ foreword: "hello"; } | { forwards: string; })[]' is not assignable to type 'Book | Book[]'.
+!!! error TS2322:   Type '({ foreword: "hello"; } | { forwards: string; })[]' is not assignable to type 'Book[]'.
+!!! error TS2322:     Type '{ foreword: "hello"; } | { forwards: string; }' is not assignable to type 'Book'.
 !!! error TS2322:       Type '{ forwards: string; }' is not assignable to type 'Book'.
 !!! error TS2322:         Object literal may only specify known properties, and 'forwards' does not exist in type 'Book'.
     
     var b4: Book & Cover = { foreword: "hi", colour: "blue" };
                                              ~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ foreword: string; colour: string; }' is not assignable to type 'Book & Cover'.
+!!! error TS2322: Type '{ foreword: "hi"; colour: string; }' is not assignable to type 'Book & Cover'.
 !!! error TS2322:   Object literal may only specify known properties, but 'colour' does not exist in type 'Book & Cover'. Did you mean to write 'color'?
     
     var b5: Book & Cover = { foreward: "hi", color: "blue" };
                              ~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ foreward: string; color: string; }' is not assignable to type 'Book & Cover'.
+!!! error TS2322: Type '{ foreward: string; color: "blue"; }' is not assignable to type 'Book & Cover'.
 !!! error TS2322:   Object literal may only specify known properties, but 'foreward' does not exist in type 'Book & Cover'. Did you mean to write 'foreword'?
     
     var b6: Book & Cover = { foreword: "hi", color: "blue", price: 10.99 };
                                                             ~~~~~~~~~~~~
-!!! error TS2322: Type '{ foreword: string; color: string; price: number; }' is not assignable to type 'Book & Cover'.
+!!! error TS2322: Type '{ foreword: "hi"; color: "blue"; price: number; }' is not assignable to type 'Book & Cover'.
 !!! error TS2322:   Object literal may only specify known properties, and 'price' does not exist in type 'Book & Cover'.
     
     var b7: Book & number = { foreword: "hi", price: 10.99 };
                                               ~~~~~~~~~~~~
-!!! error TS2322: Type '{ foreword: string; price: number; }' is not assignable to type 'Book & number'.
+!!! error TS2322: Type '{ foreword: "hi"; price: number; }' is not assignable to type 'Book & number'.
 !!! error TS2322:   Object literal may only specify known properties, and 'price' does not exist in type 'Book & number'.
     
     var b8: Cover | Cover[] = { couleur : "non" };
diff --git a/tests/baselines/reference/objectLiteralExcessProperties.types b/tests/baselines/reference/objectLiteralExcessProperties.types
index e5150394a40de..58a1d15d7a844 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.types
+++ b/tests/baselines/reference/objectLiteralExcessProperties.types
@@ -31,8 +31,8 @@ var b3: Book | (Book[]) = [{ foreword: "hello" }, { forwards: "back" }];
 >b3 : Book | Book[]
 >Book : Book
 >Book : Book
->[{ foreword: "hello" }, { forwards: "back" }] : ({ foreword: string; } | { forwards: string; })[]
->{ foreword: "hello" } : { foreword: string; }
+>[{ foreword: "hello" }, { forwards: "back" }] : ({ foreword: "hello"; } | { forwards: string; })[]
+>{ foreword: "hello" } : { foreword: "hello"; }
 >foreword : string
 >"hello" : "hello"
 >{ forwards: "back" } : { forwards: string; }
@@ -43,7 +43,7 @@ var b4: Book & Cover = { foreword: "hi", colour: "blue" };
 >b4 : Book & Cover
 >Book : Book
 >Cover : Cover
->{ foreword: "hi", colour: "blue" } : { foreword: string; colour: string; }
+>{ foreword: "hi", colour: "blue" } : { foreword: "hi"; colour: string; }
 >foreword : string
 >"hi" : "hi"
 >colour : string
@@ -53,7 +53,7 @@ var b5: Book & Cover = { foreward: "hi", color: "blue" };
 >b5 : Book & Cover
 >Book : Book
 >Cover : Cover
->{ foreward: "hi", color: "blue" } : { foreward: string; color: string; }
+>{ foreward: "hi", color: "blue" } : { foreward: string; color: "blue"; }
 >foreward : string
 >"hi" : "hi"
 >color : string
@@ -63,7 +63,7 @@ var b6: Book & Cover = { foreword: "hi", color: "blue", price: 10.99 };
 >b6 : Book & Cover
 >Book : Book
 >Cover : Cover
->{ foreword: "hi", color: "blue", price: 10.99 } : { foreword: string; color: string; price: number; }
+>{ foreword: "hi", color: "blue", price: 10.99 } : { foreword: "hi"; color: "blue"; price: number; }
 >foreword : string
 >"hi" : "hi"
 >color : string
@@ -74,7 +74,7 @@ var b6: Book & Cover = { foreword: "hi", color: "blue", price: 10.99 };
 var b7: Book & number = { foreword: "hi", price: 10.99 };
 >b7 : Book & number
 >Book : Book
->{ foreword: "hi", price: 10.99 } : { foreword: string; price: number; }
+>{ foreword: "hi", price: 10.99 } : { foreword: "hi"; price: number; }
 >foreword : string
 >"hi" : "hi"
 >price : number
diff --git a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.errors.txt b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.errors.txt
index fb2cbdaf649e6..216563784f77e 100644
--- a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.errors.txt
+++ b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.errors.txt
@@ -1,6 +1,6 @@
 tests/cases/compiler/objectLiteralFunctionArgContextualTyping.ts(8,6): error TS2345: Argument of type '{ hello: number; }' is not assignable to parameter of type 'I'.
   Object literal may only specify known properties, and 'hello' does not exist in type 'I'.
-tests/cases/compiler/objectLiteralFunctionArgContextualTyping.ts(10,17): error TS2345: Argument of type '{ value: string; what: number; }' is not assignable to parameter of type 'I'.
+tests/cases/compiler/objectLiteralFunctionArgContextualTyping.ts(10,17): error TS2345: Argument of type '{ value: ""; what: number; }' is not assignable to parameter of type 'I'.
   Object literal may only specify known properties, and 'what' does not exist in type 'I'.
 tests/cases/compiler/objectLiteralFunctionArgContextualTyping.ts(11,4): error TS2345: Argument of type '{ toString: (s: string) => string; }' is not assignable to parameter of type 'I'.
   Property 'value' is missing in type '{ toString: (s: string) => string; }'.
@@ -24,7 +24,7 @@ tests/cases/compiler/objectLiteralFunctionArgContextualTyping.ts(13,36): error T
     f2({ value: '' }) // missing toString satisfied by Object's member
     f2({ value: '', what: 1 }) // missing toString satisfied by Object's member
                     ~~~~~~~
-!!! error TS2345: Argument of type '{ value: string; what: number; }' is not assignable to parameter of type 'I'.
+!!! error TS2345: Argument of type '{ value: ""; what: number; }' is not assignable to parameter of type 'I'.
 !!! error TS2345:   Object literal may only specify known properties, and 'what' does not exist in type 'I'.
     f2({ toString: (s) => s }) // error, missing property value from ArgsString
        ~~~~~~~~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.types b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.types
index 9d51fe9fe1195..b5fce0d7531ad 100644
--- a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.types
+++ b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping.types
@@ -25,7 +25,7 @@ f2({ hello: 1 }) // error
 f2({ value: '' }) // missing toString satisfied by Object's member
 >f2({ value: '' }) : void
 >f2 : (args: I) => void
->{ value: '' } : { value: string; }
+>{ value: '' } : { value: ""; }
 >value : string
 >'' : ""
 
@@ -59,7 +59,7 @@ f2({ toString: (s: string) => s }) // error, missing property value from ArgsStr
 f2({ value: '', toString: (s) => s.uhhh }) // error
 >f2({ value: '', toString: (s) => s.uhhh }) : void
 >f2 : (args: I) => void
->{ value: '', toString: (s) => s.uhhh } : { value: string; toString: (s: string) => any; }
+>{ value: '', toString: (s) => s.uhhh } : { value: ""; toString: (s: string) => any; }
 >value : string
 >'' : ""
 >toString : (s: string) => any
diff --git a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping2.errors.txt b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping2.errors.txt
index 0117d2c0c8c23..610193d65a77f 100644
--- a/tests/baselines/reference/objectLiteralFunctionArgContextualTyping2.errors.txt
+++ b/tests/baselines/reference/objectLiteralFunctionArgContextualTyping2.errors.txt
@@ -1,14 +1,14 @@
 tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(8,6): error TS2345: Argument of type '{ hello: number; }' is not assignable to parameter of type 'I2'.
   Object literal may only specify known properties, and 'hello' does not exist in type 'I2'.
-tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(9,4): error TS2345: Argument of type '{ value: string; }' is not assignable to parameter of type 'I2'.
-  Property 'doStuff' is missing in type '{ value: string; }'.
-tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(10,17): error TS2345: Argument of type '{ value: string; what: number; }' is not assignable to parameter of type 'I2'.
+tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(9,4): error TS2345: Argument of type '{ value: ""; }' is not assignable to parameter of type 'I2'.
+  Property 'doStuff' is missing in type '{ value: ""; }'.
+tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(10,17): error TS2345: Argument of type '{ value: ""; what: number; }' is not assignable to parameter of type 'I2'.
   Object literal may only specify known properties, and 'what' does not exist in type 'I2'.
 tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(11,6): error TS2345: Argument of type '{ toString: (s: any) => any; }' is not assignable to parameter of type 'I2'.
   Object literal may only specify known properties, and 'toString' does not exist in type 'I2'.
 tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(12,6): error TS2345: Argument of type '{ toString: (s: string) => string; }' is not assignable to parameter of type 'I2'.
   Object literal may only specify known properties, and 'toString' does not exist in type 'I2'.
-tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(13,17): error TS2345: Argument of type '{ value: string; toString: (s: any) => any; }' is not assignable to parameter of type 'I2'.
+tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(13,17): error TS2345: Argument of type '{ value: ""; toString: (s: any) => any; }' is not assignable to parameter of type 'I2'.
   Object literal may only specify known properties, and 'toString' does not exist in type 'I2'.
 
 
@@ -26,11 +26,11 @@ tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(13,17): error
 !!! error TS2345:   Object literal may only specify known properties, and 'hello' does not exist in type 'I2'.
     f2({ value: '' })
        ~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ value: string; }' is not assignable to parameter of type 'I2'.
-!!! error TS2345:   Property 'doStuff' is missing in type '{ value: string; }'.
+!!! error TS2345: Argument of type '{ value: ""; }' is not assignable to parameter of type 'I2'.
+!!! error TS2345:   Property 'doStuff' is missing in type '{ value: ""; }'.
     f2({ value: '', what: 1 }) 
                     ~~~~~~~
-!!! error TS2345: Argument of type '{ value: string; what: number; }' is not assignable to parameter of type 'I2'.
+!!! error TS2345: Argument of type '{ value: ""; what: number; }' is not assignable to parameter of type 'I2'.
 !!! error TS2345:   Object literal may only specify known properties, and 'what' does not exist in type 'I2'.
     f2({ toString: (s) => s }) 
          ~~~~~~~~~~~~~~~~~~
@@ -42,5 +42,5 @@ tests/cases/compiler/objectLiteralFunctionArgContextualTyping2.ts(13,17): error
 !!! error TS2345:   Object literal may only specify known properties, and 'toString' does not exist in type 'I2'.
     f2({ value: '', toString: (s) => s.uhhh }) 
                     ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ value: string; toString: (s: any) => any; }' is not assignable to parameter of type 'I2'.
+!!! error TS2345: Argument of type '{ value: ""; toString: (s: any) => any; }' is not assignable to parameter of type 'I2'.
 !!! error TS2345:   Object literal may only specify known properties, and 'toString' does not exist in type 'I2'.
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralNormalization.errors.txt b/tests/baselines/reference/objectLiteralNormalization.errors.txt
index 6bdc9b955e324..38be8a0115ad2 100644
--- a/tests/baselines/reference/objectLiteralNormalization.errors.txt
+++ b/tests/baselines/reference/objectLiteralNormalization.errors.txt
@@ -1,20 +1,20 @@
-tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(7,1): error TS2322: Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-  Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-    Property 'c' is missing in type '{ a: number; b: number; }'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(8,1): error TS2322: Type '{ b: string; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-  Type '{ b: string; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-    Property 'a' is missing in type '{ b: string; }'.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(7,1): error TS2322: Type '{ a: 0; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
+  Type '{ a: 0; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
+    Property 'c' is missing in type '{ a: 0; b: number; }'.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(8,1): error TS2322: Type '{ b: "y"; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
+  Type '{ b: "y"; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
+    Property 'a' is missing in type '{ b: "y"; }'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(9,1): error TS2322: Type '{ c: true; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
   Type '{ c: true; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
     Property 'a' is missing in type '{ c: true; }'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(17,1): error TS2322: Type '{ a: string; b: number; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
-  Type '{ a: string; b: number; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(17,1): error TS2322: Type '{ a: "def"; b: 20; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
+  Type '{ a: "def"; b: 20; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
     Types of property 'a' are incompatible.
-      Type 'string' is not assignable to type 'undefined'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(18,1): error TS2322: Type '{ a: number; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
-  Type '{ a: number; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
+      Type '"def"' is not assignable to type 'undefined'.
+tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts(18,1): error TS2322: Type '{ a: 1; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
+  Type '{ a: 1; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
     Types of property 'a' are incompatible.
-      Type 'number' is not assignable to type 'undefined'.
+      Type '1' is not assignable to type 'undefined'.
 
 
 ==== tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts (5 errors) ====
@@ -26,14 +26,14 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts
     a1 = { a: 1 };
     a1 = { a: 0, b: 0 };  // Error
     ~~
-!!! error TS2322: Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-!!! error TS2322:   Type '{ a: number; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-!!! error TS2322:     Property 'c' is missing in type '{ a: number; b: number; }'.
+!!! error TS2322: Type '{ a: 0; b: number; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
+!!! error TS2322:   Type '{ a: 0; b: number; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
+!!! error TS2322:     Property 'c' is missing in type '{ a: 0; b: number; }'.
     a1 = { b: "y" };  // Error
     ~~
-!!! error TS2322: Type '{ b: string; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
-!!! error TS2322:   Type '{ b: string; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
-!!! error TS2322:     Property 'a' is missing in type '{ b: string; }'.
+!!! error TS2322: Type '{ b: "y"; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
+!!! error TS2322:   Type '{ b: "y"; }' is not assignable to type '{ a: number; b: string; c: boolean; }'.
+!!! error TS2322:     Property 'a' is missing in type '{ b: "y"; }'.
     a1 = { c: true };  // Error
     ~~
 !!! error TS2322: Type '{ c: true; }' is not assignable to type '{ a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }'.
@@ -48,16 +48,16 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralNormalization.ts
     a2 = {};
     a2 = { a: "def", b: 20 };  // Error
     ~~
-!!! error TS2322: Type '{ a: string; b: number; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
-!!! error TS2322:   Type '{ a: string; b: number; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
+!!! error TS2322: Type '{ a: "def"; b: 20; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
+!!! error TS2322:   Type '{ a: "def"; b: 20; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
 !!! error TS2322:     Types of property 'a' are incompatible.
-!!! error TS2322:       Type 'string' is not assignable to type 'undefined'.
+!!! error TS2322:       Type '"def"' is not assignable to type 'undefined'.
     a2 = { a: 1 };  // Error
     ~~
-!!! error TS2322: Type '{ a: number; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
-!!! error TS2322:   Type '{ a: number; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
+!!! error TS2322: Type '{ a: 1; }' is not assignable to type '{ a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }'.
+!!! error TS2322:   Type '{ a: 1; }' is not assignable to type '{ a?: undefined; b?: undefined; }'.
 !!! error TS2322:     Types of property 'a' are incompatible.
-!!! error TS2322:       Type 'number' is not assignable to type 'undefined'.
+!!! error TS2322:       Type '1' is not assignable to type 'undefined'.
     
     // Object literals containing spreads are not normalized
     declare let b1: { a: string, b: string } | { b: string, c: string };
diff --git a/tests/baselines/reference/objectLiteralNormalization.types b/tests/baselines/reference/objectLiteralNormalization.types
index 8fa49c9d9acbe..2a3a8316bc9fd 100644
--- a/tests/baselines/reference/objectLiteralNormalization.types
+++ b/tests/baselines/reference/objectLiteralNormalization.types
@@ -37,25 +37,25 @@ a1.c;  // boolean | undefined
 >c : boolean | undefined
 
 a1 = { a: 1 };
->a1 = { a: 1 } : { a: number; }
+>a1 = { a: 1 } : { a: 1; }
 >a1 : { a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }
->{ a: 1 } : { a: number; }
+>{ a: 1 } : { a: 1; }
 >a : number
 >1 : 1
 
 a1 = { a: 0, b: 0 };  // Error
->a1 = { a: 0, b: 0 } : { a: number; b: number; }
+>a1 = { a: 0, b: 0 } : { a: 0; b: number; }
 >a1 : { a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }
->{ a: 0, b: 0 } : { a: number; b: number; }
+>{ a: 0, b: 0 } : { a: 0; b: number; }
 >a : number
 >0 : 0
 >b : number
 >0 : 0
 
 a1 = { b: "y" };  // Error
->a1 = { b: "y" } : { b: string; }
+>a1 = { b: "y" } : { b: "y"; }
 >a1 : { a: number; b?: undefined; c?: undefined; } | { a: number; b: string; c?: undefined; } | { a: number; b: string; c: boolean; }
->{ b: "y" } : { b: string; }
+>{ b: "y" } : { b: "y"; }
 >b : string
 >"y" : "y"
 
@@ -92,18 +92,18 @@ a2.b;  // number | undefined
 >b : number | undefined
 
 a2 = { a: 10, b: 20 };
->a2 = { a: 10, b: 20 } : { a: number; b: number; }
+>a2 = { a: 10, b: 20 } : { a: 10; b: 20; }
 >a2 : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
->{ a: 10, b: 20 } : { a: number; b: number; }
+>{ a: 10, b: 20 } : { a: 10; b: 20; }
 >a : number
 >10 : 10
 >b : number
 >20 : 20
 
 a2 = { a: "def" };
->a2 = { a: "def" } : { a: string; }
+>a2 = { a: "def" } : { a: "def"; }
 >a2 : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
->{ a: "def" } : { a: string; }
+>{ a: "def" } : { a: "def"; }
 >a : string
 >"def" : "def"
 
@@ -113,18 +113,18 @@ a2 = {};
 >{} : {}
 
 a2 = { a: "def", b: 20 };  // Error
->a2 = { a: "def", b: 20 } : { a: string; b: number; }
+>a2 = { a: "def", b: 20 } : { a: "def"; b: 20; }
 >a2 : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
->{ a: "def", b: 20 } : { a: string; b: number; }
+>{ a: "def", b: 20 } : { a: "def"; b: 20; }
 >a : string
 >"def" : "def"
 >b : number
 >20 : 20
 
 a2 = { a: 1 };  // Error
->a2 = { a: 1 } : { a: number; }
+>a2 = { a: 1 } : { a: 1; }
 >a2 : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
->{ a: 1 } : { a: number; }
+>{ a: 1 } : { a: 1; }
 >a : number
 >1 : 1
 
@@ -282,12 +282,12 @@ let e1 = f({ a: 1, b: 2 }, { a: "abc" }, {});
 >e1 : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
 >f({ a: 1, b: 2 }, { a: "abc" }, {}) : { a: number; b: number; } | { a: string; b?: undefined; } | { a?: undefined; b?: undefined; }
 >f : <T>(...items: T[]) => T
->{ a: 1, b: 2 } : { a: number; b: number; }
+>{ a: 1, b: 2 } : { a: 1; b: 2; }
 >a : number
 >1 : 1
 >b : number
 >2 : 2
->{ a: "abc" } : { a: string; }
+>{ a: "abc" } : { a: "abc"; }
 >a : string
 >"abc" : "abc"
 >{} : {}
@@ -297,10 +297,10 @@ let e2 = f({}, { a: "abc" }, { a: 1, b: 2 });
 >f({}, { a: "abc" }, { a: 1, b: 2 }) : { a?: undefined; b?: undefined; } | { a: string; b?: undefined; } | { a: number; b: number; }
 >f : <T>(...items: T[]) => T
 >{} : {}
->{ a: "abc" } : { a: string; }
+>{ a: "abc" } : { a: "abc"; }
 >a : string
 >"abc" : "abc"
->{ a: 1, b: 2 } : { a: number; b: number; }
+>{ a: 1, b: 2 } : { a: 1; b: 2; }
 >a : number
 >1 : 1
 >b : number
@@ -311,7 +311,7 @@ let e3 = f(data, { a: 2 });
 >f(data, { a: 2 }) : { a: number; }
 >f : <T>(...items: T[]) => T
 >data : { a: 1; b: "abc"; c: true; }
->{ a: 2 } : { a: number; }
+>{ a: 2 } : { a: 2; }
 >a : number
 >2 : 2
 
@@ -319,7 +319,7 @@ let e4 = f({ a: 2 }, data);
 >e4 : { a: number; }
 >f({ a: 2 }, data) : { a: number; }
 >f : <T>(...items: T[]) => T
->{ a: 2 } : { a: number; }
+>{ a: 2 } : { a: 2; }
 >a : number
 >2 : 2
 >data : { a: 1; b: "abc"; c: true; }
diff --git a/tests/baselines/reference/objectLiteralParameterResolution.types b/tests/baselines/reference/objectLiteralParameterResolution.types
index 01eb7dac9bd52..305f17fca6be7 100644
--- a/tests/baselines/reference/objectLiteralParameterResolution.types
+++ b/tests/baselines/reference/objectLiteralParameterResolution.types
@@ -29,7 +29,7 @@ var s = $.extend({
 >$.extend : { <T>(target: T, ...objs: any[]): T; <T>(deep: boolean, target: T, ...objs: any[]): T; }
 >$ : Foo
 >extend : { <T>(target: T, ...objs: any[]): T; <T>(deep: boolean, target: T, ...objs: any[]): T; }
->{    type: "GET" ,    data: "data" ,    success: wrapSuccessCallback(requestContext, callback) ,    error: wrapErrorCallback(requestContext, errorCallback) ,    dataType: "json" ,    converters: { "text json": "" },    traditional: true ,    timeout: 12,    } : { type: string; data: string; success: any; error: any; dataType: string; converters: { "text json": string; }; traditional: true; timeout: number; }
+>{    type: "GET" ,    data: "data" ,    success: wrapSuccessCallback(requestContext, callback) ,    error: wrapErrorCallback(requestContext, errorCallback) ,    dataType: "json" ,    converters: { "text json": "" },    traditional: true ,    timeout: 12,    } : { type: "GET"; data: "data"; success: any; error: any; dataType: "json"; converters: { "text json": ""; }; traditional: true; timeout: 12; }
 
     type: "GET" ,
 >type : string
@@ -58,8 +58,8 @@ var s = $.extend({
 >"json" : "json"
 
     converters: { "text json": "" },
->converters : { "text json": string; }
->{ "text json": "" } : { "text json": string; }
+>converters : { "text json": ""; }
+>{ "text json": "" } : { "text json": ""; }
 >"" : ""
 
     traditional: true ,
diff --git a/tests/baselines/reference/objectRest.types b/tests/baselines/reference/objectRest.types
index dff8830e818b2..dcb43cd820308 100644
--- a/tests/baselines/reference/objectRest.types
+++ b/tests/baselines/reference/objectRest.types
@@ -117,12 +117,12 @@ var { x, ...fresh } = { x: 1, y: 2 };
 >2 : 2
 
 ({ x, ...fresh } = { x: 1, y: 2 });
->({ x, ...fresh } = { x: 1, y: 2 }) : { x: number; y: number; }
->{ x, ...fresh } = { x: 1, y: 2 } : { x: number; y: number; }
+>({ x, ...fresh } = { x: 1, y: 2 }) : { x: 1; y: 2; }
+>{ x, ...fresh } = { x: 1, y: 2 } : { x: 1; y: 2; }
 >{ x, ...fresh } : { y: number; x: number; }
 >x : number
 >fresh : { y: number; }
->{ x: 1, y: 2 } : { x: number; y: number; }
+>{ x: 1, y: 2 } : { x: 1; y: 2; }
 >x : number
 >1 : 1
 >y : number
diff --git a/tests/baselines/reference/objectRestForOf.types b/tests/baselines/reference/objectRestForOf.types
index 43d42a045e182..94453a8f5ab04 100644
--- a/tests/baselines/reference/objectRestForOf.types
+++ b/tests/baselines/reference/objectRestForOf.types
@@ -41,8 +41,8 @@ for (const norest of array.map(a => ({ ...a, x: 'a string' }))) {
 >map : <U>(callbackfn: (value: { x: number; y: string; }, index: number, array: { x: number; y: string; }[]) => U, thisArg?: any) => U[]
 >a => ({ ...a, x: 'a string' }) : (a: { x: number; y: string; }) => { x: string; y: string; }
 >a : { x: number; y: string; }
->({ ...a, x: 'a string' }) : { x: string; y: string; }
->{ ...a, x: 'a string' } : { x: string; y: string; }
+>({ ...a, x: 'a string' }) : { x: "a string"; y: string; }
+>{ ...a, x: 'a string' } : { x: "a string"; y: string; }
 >a : { x: number; y: string; }
 >x : string
 >'a string' : "a string"
diff --git a/tests/baselines/reference/objectRestParameter.types b/tests/baselines/reference/objectRestParameter.types
index 831ac9df59f9a..6e8e95d4e40e4 100644
--- a/tests/baselines/reference/objectRestParameter.types
+++ b/tests/baselines/reference/objectRestParameter.types
@@ -36,7 +36,7 @@ suddenly(({ x: { z = 12, ...nested }, ...rest } = { x: { z: 1, ka: 1 }, y: 'noo'
 >12 : 12
 >nested : { ka: any; }
 >rest : { y: string; }
->{ x: { z: 1, ka: 1 }, y: 'noo' } : { x: { z: number; ka: number; }; y: string; }
+>{ x: { z: 1, ka: 1 }, y: 'noo' } : { x: { z: number; ka: number; }; y: "noo"; }
 >x : { z: number; ka: number; }
 >{ z: 1, ka: 1 } : { z: number; ka: number; }
 >z : number
diff --git a/tests/baselines/reference/objectRestParameterES5.types b/tests/baselines/reference/objectRestParameterES5.types
index 1b8dd29e29ef6..c9a2fb5ca4736 100644
--- a/tests/baselines/reference/objectRestParameterES5.types
+++ b/tests/baselines/reference/objectRestParameterES5.types
@@ -36,7 +36,7 @@ suddenly(({ x: { z = 12, ...nested }, ...rest } = { x: { z: 1, ka: 1 }, y: 'noo'
 >12 : 12
 >nested : { ka: any; }
 >rest : { y: string; }
->{ x: { z: 1, ka: 1 }, y: 'noo' } : { x: { z: number; ka: number; }; y: string; }
+>{ x: { z: 1, ka: 1 }, y: 'noo' } : { x: { z: number; ka: number; }; y: "noo"; }
 >x : { z: number; ka: number; }
 >{ z: 1, ka: 1 } : { z: number; ka: number; }
 >z : number
diff --git a/tests/baselines/reference/objectSpread.types b/tests/baselines/reference/objectSpread.types
index 5166ceb54d7cf..29994a3511f3e 100644
--- a/tests/baselines/reference/objectSpread.types
+++ b/tests/baselines/reference/objectSpread.types
@@ -66,7 +66,7 @@ let override: { a: number, b: string } =
 >b : string
 
     { ...o, b: 'override' }
->{ ...o, b: 'override' } : { b: string; a: number; }
+>{ ...o, b: 'override' } : { b: "override"; a: number; }
 >o : { a: number; b: string; }
 >b : string
 >'override' : "override"
@@ -78,11 +78,11 @@ let nested: { a: number, b: boolean, c: string } =
 >c : string
 
     { ...{ a: 3, ...{ b: false, c: 'overriden' } }, c: 'whatever' }
->{ ...{ a: 3, ...{ b: false, c: 'overriden' } }, c: 'whatever' } : { c: string; b: false; a: number; }
->{ a: 3, ...{ b: false, c: 'overriden' } } : { b: false; c: string; a: number; }
+>{ ...{ a: 3, ...{ b: false, c: 'overriden' } }, c: 'whatever' } : { c: "whatever"; b: false; a: 3; }
+>{ a: 3, ...{ b: false, c: 'overriden' } } : { b: false; c: "overriden"; a: 3; }
 >a : number
 >3 : 3
->{ b: false, c: 'overriden' } : { b: false; c: string; }
+>{ b: false, c: 'overriden' } : { b: false; c: "overriden"; }
 >b : boolean
 >false : false
 >c : string
@@ -134,7 +134,7 @@ let combinedAfter: { a: number, b: string, c: boolean } =
 >c : boolean
 
     { ...o, ...o2, b: 'ok' }
->{ ...o, ...o2, b: 'ok' } : { b: string; c: boolean; a: number; }
+>{ ...o, ...o2, b: 'ok' } : { b: "ok"; c: boolean; a: number; }
 >o : { a: number; b: string; }
 >o2 : { b: string; c: boolean; }
 >b : string
@@ -148,18 +148,18 @@ let combinedNested: { a: number, b: boolean, c: string, d: string } =
 >d : string
 
     { ...{ a: 4, ...{ b: false, c: 'overriden' } }, d: 'actually new', ...{ a: 5, d: 'maybe new' } }
->{ ...{ a: 4, ...{ b: false, c: 'overriden' } }, d: 'actually new', ...{ a: 5, d: 'maybe new' } } : { a: number; d: string; b: false; c: string; }
->{ a: 4, ...{ b: false, c: 'overriden' } } : { b: false; c: string; a: number; }
+>{ ...{ a: 4, ...{ b: false, c: 'overriden' } }, d: 'actually new', ...{ a: 5, d: 'maybe new' } } : { a: 5; d: "maybe new"; b: false; c: "overriden"; }
+>{ a: 4, ...{ b: false, c: 'overriden' } } : { b: false; c: "overriden"; a: 4; }
 >a : number
 >4 : 4
->{ b: false, c: 'overriden' } : { b: false; c: string; }
+>{ b: false, c: 'overriden' } : { b: false; c: "overriden"; }
 >b : boolean
 >false : false
 >c : string
 >'overriden' : "overriden"
 >d : string
 >'actually new' : "actually new"
->{ a: 5, d: 'maybe new' } : { a: number; d: string; }
+>{ a: 5, d: 'maybe new' } : { a: 5; d: "maybe new"; }
 >a : number
 >5 : 5
 >d : string
@@ -172,8 +172,8 @@ let combinedNestedChangeType: { a: number, b: boolean, c: number } =
 >c : number
 
     { ...{ a: 1, ...{ b: false, c: 'overriden' } }, c: -1 }
->{ ...{ a: 1, ...{ b: false, c: 'overriden' } }, c: -1 } : { c: number; b: false; a: number; }
->{ a: 1, ...{ b: false, c: 'overriden' } } : { b: false; c: string; a: number; }
+>{ ...{ a: 1, ...{ b: false, c: 'overriden' } }, c: -1 } : { c: -1; b: false; a: 1; }
+>{ a: 1, ...{ b: false, c: 'overriden' } } : { b: false; c: string; a: 1; }
 >a : number
 >1 : 1
 >{ b: false, c: 'overriden' } : { b: false; c: string; }
@@ -211,7 +211,7 @@ let getter: { a: number, c: number } =
 >c : number
 
     { ...op, c: 7 }
->{ ...op, c: 7 } : { c: number; a: number; }
+>{ ...op, c: 7 } : { c: 7; a: number; }
 >op : { readonly a: number; }
 >c : number
 >7 : 7
@@ -280,17 +280,17 @@ function conditionalSpreadBoolean(b: boolean) : { x: number, y: number } {
 >13 : 13
 
     o = {
->o = {        ...o,        ...b && { x: 14 }    } : { x: number; y: number; } | { x: number; y: number; }
+>o = {        ...o,        ...b && { x: 14 }    } : { x: number; y: number; } | { x: 14; y: number; }
 >o : { x: number; y: number; }
->{        ...o,        ...b && { x: 14 }    } : { x: number; y: number; } | { x: number; y: number; }
+>{        ...o,        ...b && { x: 14 }    } : { x: number; y: number; } | { x: 14; y: number; }
 
         ...o,
 >o : { x: number; y: number; }
 
         ...b && { x: 14 }
->b && { x: 14 } : false | { x: number; }
+>b && { x: 14 } : false | { x: 14; }
 >b : boolean
->{ x: 14 } : { x: number; }
+>{ x: 14 } : { x: 14; }
 >x : number
 >14 : 14
     }
@@ -444,7 +444,7 @@ let changeTypeAfter: { a: string, b: string } =
 >b : string
 
     { ...o, a: 'wrong type?' }
->{ ...o, a: 'wrong type?' } : { a: string; b: string; }
+>{ ...o, a: 'wrong type?' } : { a: "wrong type?"; b: string; }
 >o : { a: number; b: string; }
 >a : string
 >'wrong type?' : "wrong type?"
@@ -521,7 +521,7 @@ function container(
 >b : string
 
         { ['before everything']: 12, ...o, b: 'yes' }
->{ ['before everything']: 12, ...o, b: 'yes' } : { b: string; a: number; ['before everything']: number; }
+>{ ['before everything']: 12, ...o, b: 'yes' } : { b: "yes"; a: number; ['before everything']: 12; }
 >'before everything' : "before everything"
 >12 : 12
 >o : { a: number; b: string; }
@@ -535,7 +535,7 @@ function container(
 >c : boolean
 
         { ...o, ['in the middle']: 13, b: 'maybe?', ...o2 }
->{ ...o, ['in the middle']: 13, b: 'maybe?', ...o2 } : { b: string; c: boolean; ['in the middle']: number; a: number; }
+>{ ...o, ['in the middle']: 13, b: 'maybe?', ...o2 } : { b: string; c: boolean; ['in the middle']: 13; a: number; }
 >o : { a: number; b: string; }
 >'in the middle' : "in the middle"
 >13 : 13
@@ -549,7 +549,7 @@ function container(
 >b : string
 
         { ...o, b: 'yeah', ['at the end']: 14 }
->{ ...o, b: 'yeah', ['at the end']: 14 } : { b: string; ['at the end']: number; a: number; }
+>{ ...o, b: 'yeah', ['at the end']: 14 } : { b: "yeah"; ['at the end']: 14; a: number; }
 >o : { a: number; b: string; }
 >b : string
 >'yeah' : "yeah"
diff --git a/tests/baselines/reference/objectSpreadNegative.errors.txt b/tests/baselines/reference/objectSpreadNegative.errors.txt
index 5b78f10f2818f..a6bd50a3a6f76 100644
--- a/tests/baselines/reference/objectSpreadNegative.errors.txt
+++ b/tests/baselines/reference/objectSpreadNegative.errors.txt
@@ -1,8 +1,8 @@
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(13,21): error TS2339: Property 'x' does not exist on type '{}'.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(16,5): error TS2322: Type '{ sn?: string | number; }' is not assignable to type '{ sn: string | number; }'.
   Property 'sn' is optional in type '{ sn?: string | number; }' but required in type '{ sn: string | number; }'.
-tests/cases/conformance/types/spread/objectSpreadNegative.ts(23,1): error TS2322: Type '{ s: string; }' is not assignable to type '{ s: string; b: boolean; }'.
-  Property 'b' is missing in type '{ s: string; }'.
+tests/cases/conformance/types/spread/objectSpreadNegative.ts(23,1): error TS2322: Type '{ s: "foo"; }' is not assignable to type '{ s: string; b: boolean; }'.
+  Property 'b' is missing in type '{ s: "foo"; }'.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(25,1): error TS2322: Type '{ b: boolean; }' is not assignable to type '{ s: string; b: boolean; }'.
   Property 's' is missing in type '{ b: boolean; }'.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(28,36): error TS2300: Duplicate identifier 'b'.
@@ -18,7 +18,7 @@ tests/cases/conformance/types/spread/objectSpreadNegative.ts(53,9): error TS2339
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(58,11): error TS2339: Property 'a' does not exist on type 'object'.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(62,14): error TS2698: Spread types may only be created from object types.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(65,14): error TS2698: Spread types may only be created from object types.
-tests/cases/conformance/types/spread/objectSpreadNegative.ts(79,37): error TS2322: Type '{ a: string; b: string; extra: string; }' is not assignable to type 'A'.
+tests/cases/conformance/types/spread/objectSpreadNegative.ts(79,37): error TS2322: Type '{ a: "a"; b: "b"; extra: string; }' is not assignable to type 'A'.
   Object literal may only specify known properties, and 'extra' does not exist in type 'A'.
 tests/cases/conformance/types/spread/objectSpreadNegative.ts(82,7): error TS2322: Type '{ a: string; b: string; extra: string; }' is not assignable to type 'A'.
   Object literal may only specify known properties, and 'extra' does not exist in type 'A'.
@@ -56,8 +56,8 @@ tests/cases/conformance/types/spread/objectSpreadNegative.ts(84,7): error TS2322
     let spread = { ...{ b: true }, ...{s: "foo" } };
     spread = { s: "foo" };  // error, missing 'b'
     ~~~~~~
-!!! error TS2322: Type '{ s: string; }' is not assignable to type '{ s: string; b: boolean; }'.
-!!! error TS2322:   Property 'b' is missing in type '{ s: string; }'.
+!!! error TS2322: Type '{ s: "foo"; }' is not assignable to type '{ s: string; b: boolean; }'.
+!!! error TS2322:   Property 'b' is missing in type '{ s: "foo"; }'.
     let b = { b: false };
     spread = b; // error, missing 's'
     ~~~~~~
@@ -144,7 +144,7 @@ tests/cases/conformance/types/spread/objectSpreadNegative.ts(84,7): error TS2322
     type Extra = { a: string, b: string, extra: string };
     const extra1: A = { a: "a", b: "b", extra: "extra" };
                                         ~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ a: string; b: string; extra: string; }' is not assignable to type 'A'.
+!!! error TS2322: Type '{ a: "a"; b: "b"; extra: string; }' is not assignable to type 'A'.
 !!! error TS2322:   Object literal may only specify known properties, and 'extra' does not exist in type 'A'.
     const extra2 = { a: "a", b: "b", extra: "extra" };
     const a1: A = { ...extra1 }; // error spans should be here
diff --git a/tests/baselines/reference/objectSpreadNegative.types b/tests/baselines/reference/objectSpreadNegative.types
index 5a495ab6f9df4..77b7cc0896e94 100644
--- a/tests/baselines/reference/objectSpreadNegative.types
+++ b/tests/baselines/reference/objectSpreadNegative.types
@@ -77,9 +77,9 @@ let spread = { ...{ b: true }, ...{s: "foo" } };
 >"foo" : "foo"
 
 spread = { s: "foo" };  // error, missing 'b'
->spread = { s: "foo" } : { s: string; }
+>spread = { s: "foo" } : { s: "foo"; }
 >spread : { s: string; b: boolean; }
->{ s: "foo" } : { s: string; }
+>{ s: "foo" } : { s: "foo"; }
 >s : string
 >"foo" : "foo"
 
@@ -273,12 +273,12 @@ let exclusive: { id: string, a: number, b: string, c: string, d: boolean } =
     f({ a: 1, b: 'yes' }, { c: 'no', d: false })
 >f({ a: 1, b: 'yes' }, { c: 'no', d: false }) : any
 >f : <T, U>(t: T, u: U) => any
->{ a: 1, b: 'yes' } : { a: number; b: string; }
+>{ a: 1, b: 'yes' } : { a: 1; b: "yes"; }
 >a : number
 >1 : 1
 >b : string
 >'yes' : "yes"
->{ c: 'no', d: false } : { c: string; d: false; }
+>{ c: 'no', d: false } : { c: "no"; d: false; }
 >c : string
 >'no' : "no"
 >d : boolean
@@ -293,10 +293,10 @@ let overlap: { id: string, a: number, b: string } =
     f({ a: 1 }, { a: 2, b: 'extra' })
 >f({ a: 1 }, { a: 2, b: 'extra' }) : any
 >f : <T, U>(t: T, u: U) => any
->{ a: 1 } : { a: number; }
+>{ a: 1 } : { a: 1; }
 >a : number
 >1 : 1
->{ a: 2, b: 'extra' } : { a: number; b: string; }
+>{ a: 2, b: 'extra' } : { a: 2; b: "extra"; }
 >a : number
 >2 : 2
 >b : string
@@ -310,10 +310,10 @@ let overlapConflict: { id:string, a: string } =
     f({ a: 1 }, { a: 'mismatch' })
 >f({ a: 1 }, { a: 'mismatch' }) : any
 >f : <T, U>(t: T, u: U) => any
->{ a: 1 } : { a: number; }
+>{ a: 1 } : { a: 1; }
 >a : number
 >1 : 1
->{ a: 'mismatch' } : { a: string; }
+>{ a: 'mismatch' } : { a: "mismatch"; }
 >a : string
 >'mismatch' : "mismatch"
 
@@ -327,12 +327,12 @@ let overwriteId: { id: string, a: number, c: number, d: string } =
     f({ a: 1, id: true }, { c: 1, d: 'no' })
 >f({ a: 1, id: true }, { c: 1, d: 'no' }) : any
 >f : <T, U>(t: T, u: U) => any
->{ a: 1, id: true } : { a: number; id: true; }
+>{ a: 1, id: true } : { a: 1; id: true; }
 >a : number
 >1 : 1
 >id : boolean
 >true : true
->{ c: 1, d: 'no' } : { c: number; d: string; }
+>{ c: 1, d: 'no' } : { c: 1; d: "no"; }
 >c : number
 >1 : 1
 >d : string
@@ -353,7 +353,7 @@ type Extra = { a: string, b: string, extra: string };
 const extra1: A = { a: "a", b: "b", extra: "extra" };
 >extra1 : A
 >A : A
->{ a: "a", b: "b", extra: "extra" } : { a: string; b: string; extra: string; }
+>{ a: "a", b: "b", extra: "extra" } : { a: "a"; b: "b"; extra: string; }
 >a : string
 >"a" : "a"
 >b : string
@@ -386,7 +386,7 @@ const a2: A = { ...extra2 }; // not on the symbol declarations above
 const extra3: Extra = { a: "a", b: "b", extra: "extra" };
 >extra3 : Extra
 >Extra : Extra
->{ a: "a", b: "b", extra: "extra" } : { a: string; b: string; extra: string; }
+>{ a: "a", b: "b", extra: "extra" } : { a: "a"; b: "b"; extra: "extra"; }
 >a : string
 >"a" : "a"
 >b : string
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
index 8ac7b807cbab8..d2562b5f66caa 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
@@ -50,7 +50,7 @@ var a: {
 var b: { [x: number]: string; } = { 0: '' };
 >b : { [x: number]: string; }
 >x : number
->{ 0: '' } : { 0: string; }
+>{ 0: '' } : { 0: ""; }
 >'' : ""
 
 function foo1(x: A);
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
index bcf2ef6d73325..cf39445f507e5 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
@@ -50,7 +50,7 @@ var a: {
 var b: { [x: number]: string; } = { 0: '' };
 >b : { [x: number]: string; }
 >x : number
->{ 0: '' } : { 0: string; }
+>{ 0: '' } : { 0: ""; }
 >'' : ""
 
 function foo1(x: A);
diff --git a/tests/baselines/reference/objectTypesIdentityWithStringIndexers.types b/tests/baselines/reference/objectTypesIdentityWithStringIndexers.types
index 4028835a9c4ad..b364dcb65aac9 100644
--- a/tests/baselines/reference/objectTypesIdentityWithStringIndexers.types
+++ b/tests/baselines/reference/objectTypesIdentityWithStringIndexers.types
@@ -50,7 +50,7 @@ var a: {
 var b: { [x: string]: string; } = { foo: '' };
 >b : { [x: string]: string; }
 >x : string
->{ foo: '' } : { foo: string; }
+>{ foo: '' } : { foo: ""; }
 >foo : string
 >'' : ""
 
diff --git a/tests/baselines/reference/optionalBindingParameters1.errors.txt b/tests/baselines/reference/optionalBindingParameters1.errors.txt
index 339f004298394..6be31635ddeca 100644
--- a/tests/baselines/reference/optionalBindingParameters1.errors.txt
+++ b/tests/baselines/reference/optionalBindingParameters1.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/conformance/es6/destructuring/optionalBindingParameters1.ts(1,14): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
-tests/cases/conformance/es6/destructuring/optionalBindingParameters1.ts(7,5): error TS2345: Argument of type '[boolean, number, ""]' is not assignable to parameter of type '[string, number, boolean]'.
+tests/cases/conformance/es6/destructuring/optionalBindingParameters1.ts(7,5): error TS2345: Argument of type '[boolean, 0, string]' is not assignable to parameter of type '[string, number, boolean]'.
   Type 'boolean' is not assignable to type 'string'.
 
 
@@ -14,5 +14,5 @@ tests/cases/conformance/es6/destructuring/optionalBindingParameters1.ts(7,5): er
     
     foo([false, 0, ""]);
         ~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[boolean, number, ""]' is not assignable to parameter of type '[string, number, boolean]'.
+!!! error TS2345: Argument of type '[boolean, 0, string]' is not assignable to parameter of type '[string, number, boolean]'.
 !!! error TS2345:   Type 'boolean' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalBindingParameters1.types b/tests/baselines/reference/optionalBindingParameters1.types
index 74b255325132e..a191a7480fc70 100644
--- a/tests/baselines/reference/optionalBindingParameters1.types
+++ b/tests/baselines/reference/optionalBindingParameters1.types
@@ -10,7 +10,7 @@ function foo([x,y,z]?: [string, number, boolean]) {
 foo(["", 0, false]);
 >foo(["", 0, false]) : void
 >foo : ([x, y, z]?: [string, number, boolean]) => void
->["", 0, false] : [string, number, false]
+>["", 0, false] : ["", 0, false]
 >"" : ""
 >0 : 0
 >false : false
diff --git a/tests/baselines/reference/optionalBindingParameters2.errors.txt b/tests/baselines/reference/optionalBindingParameters2.errors.txt
index b7e9bb1c2da1a..c5673d9e7e905 100644
--- a/tests/baselines/reference/optionalBindingParameters2.errors.txt
+++ b/tests/baselines/reference/optionalBindingParameters2.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(1,14): error TS2463: A binding pattern parameter cannot be optional in an implementation signature.
-tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(7,5): error TS2345: Argument of type '{ x: boolean; y: number; z: ""; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
+tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(7,5): error TS2345: Argument of type '{ x: boolean; y: 0; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
   Types of property 'x' are incompatible.
     Type 'boolean' is not assignable to type 'string'.
 
@@ -15,6 +15,6 @@ tests/cases/conformance/es6/destructuring/optionalBindingParameters2.ts(7,5): er
     
     foo({ x: false, y: 0, z: "" });
         ~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: boolean; y: number; z: ""; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
+!!! error TS2345: Argument of type '{ x: boolean; y: 0; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
 !!! error TS2345:   Types of property 'x' are incompatible.
 !!! error TS2345:     Type 'boolean' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalBindingParameters2.types b/tests/baselines/reference/optionalBindingParameters2.types
index 69538fe661d3c..394e3ae9f6bdb 100644
--- a/tests/baselines/reference/optionalBindingParameters2.types
+++ b/tests/baselines/reference/optionalBindingParameters2.types
@@ -13,7 +13,7 @@ function foo({ x, y, z }?: { x: string; y: number; z: boolean }) {
 foo({ x: "", y: 0, z: false });
 >foo({ x: "", y: 0, z: false }) : void
 >foo : ({ x, y, z }?: { x: string; y: number; z: boolean; }) => void
->{ x: "", y: 0, z: false } : { x: string; y: number; z: false; }
+>{ x: "", y: 0, z: false } : { x: ""; y: 0; z: false; }
 >x : string
 >"" : ""
 >y : number
diff --git a/tests/baselines/reference/optionalBindingParametersInOverloads1.errors.txt b/tests/baselines/reference/optionalBindingParametersInOverloads1.errors.txt
index d2be862f6eff7..24b73fa6e4745 100644
--- a/tests/baselines/reference/optionalBindingParametersInOverloads1.errors.txt
+++ b/tests/baselines/reference/optionalBindingParametersInOverloads1.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads1.ts(8,5): error TS2345: Argument of type '[boolean, number, ""]' is not assignable to parameter of type '[string, number, boolean]'.
+tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads1.ts(8,5): error TS2345: Argument of type '[boolean, 0, string]' is not assignable to parameter of type '[string, number, boolean]'.
   Type 'boolean' is not assignable to type 'string'.
 
 
@@ -12,5 +12,5 @@ tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads1.
     
     foo([false, 0, ""]);
         ~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '[boolean, number, ""]' is not assignable to parameter of type '[string, number, boolean]'.
+!!! error TS2345: Argument of type '[boolean, 0, string]' is not assignable to parameter of type '[string, number, boolean]'.
 !!! error TS2345:   Type 'boolean' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalBindingParametersInOverloads1.types b/tests/baselines/reference/optionalBindingParametersInOverloads1.types
index 01d1756a6ac7e..8cafb45176687 100644
--- a/tests/baselines/reference/optionalBindingParametersInOverloads1.types
+++ b/tests/baselines/reference/optionalBindingParametersInOverloads1.types
@@ -14,7 +14,7 @@ function foo(...rest: any[]) {
 foo(["", 0, false]);
 >foo(["", 0, false]) : any
 >foo : ([x, y, z]?: [string, number, boolean]) => any
->["", 0, false] : [string, number, false]
+>["", 0, false] : ["", 0, false]
 >"" : ""
 >0 : 0
 >false : false
diff --git a/tests/baselines/reference/optionalBindingParametersInOverloads2.errors.txt b/tests/baselines/reference/optionalBindingParametersInOverloads2.errors.txt
index ccbdfce2fddec..8060b753ce9b2 100644
--- a/tests/baselines/reference/optionalBindingParametersInOverloads2.errors.txt
+++ b/tests/baselines/reference/optionalBindingParametersInOverloads2.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads2.ts(8,5): error TS2345: Argument of type '{ x: boolean; y: number; z: ""; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
+tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads2.ts(8,5): error TS2345: Argument of type '{ x: boolean; y: 0; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
   Types of property 'x' are incompatible.
     Type 'boolean' is not assignable to type 'string'.
 
@@ -13,6 +13,6 @@ tests/cases/conformance/es6/destructuring/optionalBindingParametersInOverloads2.
     
     foo({ x: false, y: 0, z: "" });
         ~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ x: boolean; y: number; z: ""; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
+!!! error TS2345: Argument of type '{ x: boolean; y: 0; z: string; }' is not assignable to parameter of type '{ x: string; y: number; z: boolean; }'.
 !!! error TS2345:   Types of property 'x' are incompatible.
 !!! error TS2345:     Type 'boolean' is not assignable to type 'string'.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalBindingParametersInOverloads2.types b/tests/baselines/reference/optionalBindingParametersInOverloads2.types
index 287a0634a8e35..2ee516a786749 100644
--- a/tests/baselines/reference/optionalBindingParametersInOverloads2.types
+++ b/tests/baselines/reference/optionalBindingParametersInOverloads2.types
@@ -17,7 +17,7 @@ function foo(...rest: any[]) {
 foo({ x: "", y: 0, z: false });
 >foo({ x: "", y: 0, z: false }) : any
 >foo : ({ x, y, z }?: { x: string; y: number; z: boolean; }) => any
->{ x: "", y: 0, z: false } : { x: string; y: number; z: false; }
+>{ x: "", y: 0, z: false } : { x: ""; y: 0; z: false; }
 >x : string
 >"" : ""
 >y : number
diff --git a/tests/baselines/reference/optionalParamArgsTest.types b/tests/baselines/reference/optionalParamArgsTest.types
index bb898755bcb4d..dca38398e78c8 100644
--- a/tests/baselines/reference/optionalParamArgsTest.types
+++ b/tests/baselines/reference/optionalParamArgsTest.types
@@ -509,10 +509,10 @@ fnOpt1(1, [2, 3], [1], true);
 >fnOpt1(1, [2, 3], [1], true) : void
 >fnOpt1 : (id: number, children?: number[], expectedPath?: number[], isRoot?: boolean) => void
 >1 : 1
->[2, 3] : number[]
+>[2, 3] : (2 | 3)[]
 >2 : 2
 >3 : 3
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 >true : true
 
@@ -520,10 +520,10 @@ fnOpt2(1, [2, 3], [1], true);
 >fnOpt2(1, [2, 3], [1], true) : void
 >fnOpt2 : (id: number, children?: number[], expectedPath?: number[], isRoot?: boolean) => void
 >1 : 1
->[2, 3] : number[]
+>[2, 3] : (2 | 3)[]
 >2 : 2
 >3 : 3
->[1] : number[]
+>[1] : 1[]
 >1 : 1
 >true : true
 
diff --git a/tests/baselines/reference/optionalProperties01.types b/tests/baselines/reference/optionalProperties01.types
index b60d87f07becb..dc89b1bc674df 100644
--- a/tests/baselines/reference/optionalProperties01.types
+++ b/tests/baselines/reference/optionalProperties01.types
@@ -15,7 +15,7 @@ interface Foo {
 const foo1 = { required1: "hello" } as Foo;
 >foo1 : Foo
 >{ required1: "hello" } as Foo : Foo
->{ required1: "hello" } : { required1: string; }
+>{ required1: "hello" } : { required1: "hello"; }
 >required1 : string
 >"hello" : "hello"
 >Foo : Foo
@@ -23,7 +23,7 @@ const foo1 = { required1: "hello" } as Foo;
 const foo2 = { required1: "hello", optional: "bar" } as Foo;
 >foo2 : Foo
 >{ required1: "hello", optional: "bar" } as Foo : Foo
->{ required1: "hello", optional: "bar" } : { required1: string; optional: string; }
+>{ required1: "hello", optional: "bar" } : { required1: "hello"; optional: "bar"; }
 >required1 : string
 >"hello" : "hello"
 >optional : string
diff --git a/tests/baselines/reference/optionalPropertiesTest.errors.txt b/tests/baselines/reference/optionalPropertiesTest.errors.txt
index a4b721e92ef66..e281057c5bbbc 100644
--- a/tests/baselines/reference/optionalPropertiesTest.errors.txt
+++ b/tests/baselines/reference/optionalPropertiesTest.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/compiler/optionalPropertiesTest.ts(14,1): error TS2322: Type '{ name: string; }' is not assignable to type 'IFoo'.
-  Property 'id' is missing in type '{ name: string; }'.
+tests/cases/compiler/optionalPropertiesTest.ts(14,1): error TS2322: Type '{ name: "test"; }' is not assignable to type 'IFoo'.
+  Property 'id' is missing in type '{ name: "test"; }'.
 tests/cases/compiler/optionalPropertiesTest.ts(25,5): error TS2322: Type '{}' is not assignable to type 'i1'.
   Property 'M' is missing in type '{}'.
 tests/cases/compiler/optionalPropertiesTest.ts(26,5): error TS2322: Type '{}' is not assignable to type 'i3'.
@@ -24,8 +24,8 @@ tests/cases/compiler/optionalPropertiesTest.ts(40,1): error TS2322: Type 'i2' is
     foo = { id: 1234, name: "test" };  // Ok
     foo = { name: "test" };            // Error, id missing
     ~~~
-!!! error TS2322: Type '{ name: string; }' is not assignable to type 'IFoo'.
-!!! error TS2322:   Property 'id' is missing in type '{ name: string; }'.
+!!! error TS2322: Type '{ name: "test"; }' is not assignable to type 'IFoo'.
+!!! error TS2322:   Property 'id' is missing in type '{ name: "test"; }'.
     foo = {id: 1234, print:()=>{}}	   // Ok
     
     var s = foo.name || "default";
diff --git a/tests/baselines/reference/optionalPropertiesTest.types b/tests/baselines/reference/optionalPropertiesTest.types
index 018a70c051b90..fc441a2078115 100644
--- a/tests/baselines/reference/optionalPropertiesTest.types
+++ b/tests/baselines/reference/optionalPropertiesTest.types
@@ -24,32 +24,32 @@ var foo: IFoo;
 >IFoo : IFoo
 
 foo = { id: 1234 };                // Ok
->foo = { id: 1234 } : { id: number; }
+>foo = { id: 1234 } : { id: 1234; }
 >foo : IFoo
->{ id: 1234 } : { id: number; }
+>{ id: 1234 } : { id: 1234; }
 >id : number
 >1234 : 1234
 
 foo = { id: 1234, name: "test" };  // Ok
->foo = { id: 1234, name: "test" } : { id: number; name: string; }
+>foo = { id: 1234, name: "test" } : { id: 1234; name: "test"; }
 >foo : IFoo
->{ id: 1234, name: "test" } : { id: number; name: string; }
+>{ id: 1234, name: "test" } : { id: 1234; name: "test"; }
 >id : number
 >1234 : 1234
 >name : string
 >"test" : "test"
 
 foo = { name: "test" };            // Error, id missing
->foo = { name: "test" } : { name: string; }
+>foo = { name: "test" } : { name: "test"; }
 >foo : IFoo
->{ name: "test" } : { name: string; }
+>{ name: "test" } : { name: "test"; }
 >name : string
 >"test" : "test"
 
 foo = {id: 1234, print:()=>{}}	   // Ok
->foo = {id: 1234, print:()=>{}} : { id: number; print: () => void; }
+>foo = {id: 1234, print:()=>{}} : { id: 1234; print: () => void; }
 >foo : IFoo
->{id: 1234, print:()=>{}} : { id: number; print: () => void; }
+>{id: 1234, print:()=>{}} : { id: 1234; print: () => void; }
 >id : number
 >1234 : 1234
 >print : () => void
@@ -120,7 +120,7 @@ var test5: i1 = { M: function () { } };
 var test6: i3 = { M: 5 };
 >test6 : i3
 >i3 : i3
->{ M: 5 } : { M: number; }
+>{ M: 5 } : { M: 5; }
 >M : number
 >5 : 5
 
@@ -139,7 +139,7 @@ test7 = {};
 var test8: i4 = { M: 5 }
 >test8 : i4
 >i4 : i4
->{ M: 5 } : { M: number; }
+>{ M: 5 } : { M: 5; }
 >M : number
 >5 : 5
 
diff --git a/tests/baselines/reference/orderMattersForSignatureGroupIdentity.errors.txt b/tests/baselines/reference/orderMattersForSignatureGroupIdentity.errors.txt
index dddc0a0d575b6..e4da12a606b61 100644
--- a/tests/baselines/reference/orderMattersForSignatureGroupIdentity.errors.txt
+++ b/tests/baselines/reference/orderMattersForSignatureGroupIdentity.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(19,5): error TS2345: Argument of type '{ s: string; n: number; }' is not assignable to parameter of type '{ n: number; }'.
+tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(19,5): error TS2345: Argument of type '{ s: string; n: 0; }' is not assignable to parameter of type '{ n: number; }'.
   Object literal may only specify known properties, and 's' does not exist in type '{ n: number; }'.
 tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(22,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'w' has type 'A' at tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts 20:4, but here has type 'C'.
-tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(24,5): error TS2345: Argument of type '{ s: string; n: number; }' is not assignable to parameter of type '{ n: number; }'.
+tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(24,5): error TS2345: Argument of type '{ s: string; n: 0; }' is not assignable to parameter of type '{ n: number; }'.
   Object literal may only specify known properties, and 's' does not exist in type '{ n: number; }'.
 
 
@@ -26,7 +26,7 @@ tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(24,5): error TS234
     
     v({ s: "", n: 0 }).toLowerCase();
         ~~~~~
-!!! error TS2345: Argument of type '{ s: string; n: number; }' is not assignable to parameter of type '{ n: number; }'.
+!!! error TS2345: Argument of type '{ s: string; n: 0; }' is not assignable to parameter of type '{ n: number; }'.
 !!! error TS2345:   Object literal may only specify known properties, and 's' does not exist in type '{ n: number; }'.
     
     var w: A;
@@ -36,5 +36,5 @@ tests/cases/compiler/orderMattersForSignatureGroupIdentity.ts(24,5): error TS234
     
     w({ s: "", n: 0 }).toLowerCase();
         ~~~~~
-!!! error TS2345: Argument of type '{ s: string; n: number; }' is not assignable to parameter of type '{ n: number; }'.
+!!! error TS2345: Argument of type '{ s: string; n: 0; }' is not assignable to parameter of type '{ n: number; }'.
 !!! error TS2345:   Object literal may only specify known properties, and 's' does not exist in type '{ n: number; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/overloadOnConstAsTypeAnnotation.types b/tests/baselines/reference/overloadOnConstAsTypeAnnotation.types
index 5afe742dc680c..bbd092c1e49e7 100644
--- a/tests/baselines/reference/overloadOnConstAsTypeAnnotation.types
+++ b/tests/baselines/reference/overloadOnConstAsTypeAnnotation.types
@@ -2,7 +2,7 @@
 var f: (x: 'hi') => number = (x: 'hi') => { return 1; };
 >f : (x: "hi") => number
 >x : "hi"
->(x: 'hi') => { return 1; } : (x: "hi") => number
+>(x: 'hi') => { return 1; } : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadOnConstNoAnyImplementation.types b/tests/baselines/reference/overloadOnConstNoAnyImplementation.types
index 00829f9dc8ec4..d9ad620a1ba65 100644
--- a/tests/baselines/reference/overloadOnConstNoAnyImplementation.types
+++ b/tests/baselines/reference/overloadOnConstNoAnyImplementation.types
@@ -50,7 +50,7 @@ function x1(a: number, cb: (x: string) => number) {
 var cb: (number) => number = (x: number) => 1;
 >cb : (number: any) => number
 >number : any
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
@@ -64,7 +64,7 @@ x1(1, (x: 'hi') => 1); // error
 >x1(1, (x: 'hi') => 1) : any
 >x1 : { (a: number, cb: (x: "hi") => number): any; (a: number, cb: (x: "bye") => number): any; }
 >1 : 1
->(x: 'hi') => 1 : (x: "hi") => number
+>(x: 'hi') => 1 : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
@@ -72,7 +72,7 @@ x1(1, (x: string) => 1);
 >x1(1, (x: string) => 1) : any
 >x1 : { (a: number, cb: (x: "hi") => number): any; (a: number, cb: (x: "bye") => number): any; }
 >1 : 1
->(x: string) => 1 : (x: string) => number
+>(x: string) => 1 : (x: string) => 1
 >x : string
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadOnConstNoAnyImplementation2.errors.txt b/tests/baselines/reference/overloadOnConstNoAnyImplementation2.errors.txt
index a090f370863f5..436348c7446c4 100644
--- a/tests/baselines/reference/overloadOnConstNoAnyImplementation2.errors.txt
+++ b/tests/baselines/reference/overloadOnConstNoAnyImplementation2.errors.txt
@@ -1,9 +1,9 @@
 tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(6,5): error TS2394: Overload signature is not compatible with function implementation.
 tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(12,18): error TS2345: Argument of type '1' is not assignable to parameter of type 'string'.
-tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(18,9): error TS2345: Argument of type '(x: "bye") => number' is not assignable to parameter of type '(x: "hi") => number'.
+tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(18,9): error TS2345: Argument of type '(x: "bye") => 1' is not assignable to parameter of type '(x: "hi") => number'.
   Types of parameters 'x' and 'x' are incompatible.
     Type '"hi"' is not assignable to type '"bye"'.
-tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(21,9): error TS2345: Argument of type '(x: number) => number' is not assignable to parameter of type '(x: "hi") => number'.
+tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(21,9): error TS2345: Argument of type '(x: number) => 1' is not assignable to parameter of type '(x: "hi") => number'.
   Types of parameters 'x' and 'x' are incompatible.
     Type '"hi"' is not assignable to type 'number'.
 
@@ -32,13 +32,13 @@ tests/cases/compiler/overloadOnConstNoAnyImplementation2.ts(21,9): error TS2345:
     c.x1(1, (x: 'hi') => { return 1; } );
     c.x1(1, (x: 'bye') => { return 1; } );
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(x: "bye") => number' is not assignable to parameter of type '(x: "hi") => number'.
+!!! error TS2345: Argument of type '(x: "bye") => 1' is not assignable to parameter of type '(x: "hi") => number'.
 !!! error TS2345:   Types of parameters 'x' and 'x' are incompatible.
 !!! error TS2345:     Type '"hi"' is not assignable to type '"bye"'.
     c.x1(1, (x) => { return 1; } );
     
     c.x1(1, (x: number) => { return 1; } );
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(x: number) => number' is not assignable to parameter of type '(x: "hi") => number'.
+!!! error TS2345: Argument of type '(x: number) => 1' is not assignable to parameter of type '(x: "hi") => number'.
 !!! error TS2345:   Types of parameters 'x' and 'x' are incompatible.
 !!! error TS2345:     Type '"hi"' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/overloadOnConstNoAnyImplementation2.types b/tests/baselines/reference/overloadOnConstNoAnyImplementation2.types
index 108b922944d11..7facb2943356a 100644
--- a/tests/baselines/reference/overloadOnConstNoAnyImplementation2.types
+++ b/tests/baselines/reference/overloadOnConstNoAnyImplementation2.types
@@ -60,7 +60,7 @@ c.x1(1, (x: 'hi') => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: 'hi') => { return 1; } : (x: "hi") => number
+>(x: 'hi') => { return 1; } : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
@@ -70,7 +70,7 @@ c.x1(1, (x: 'bye') => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: 'bye') => { return 1; } : (x: "bye") => number
+>(x: 'bye') => { return 1; } : (x: "bye") => 1
 >x : "bye"
 >1 : 1
 
@@ -80,7 +80,7 @@ c.x1(1, (x) => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x) => { return 1; } : (x: "hi") => number
+>(x) => { return 1; } : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
@@ -90,7 +90,7 @@ c.x1(1, (x: number) => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: number) => { return 1; } : (x: number) => number
+>(x: number) => { return 1; } : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadOnConstNoStringImplementation.types b/tests/baselines/reference/overloadOnConstNoStringImplementation.types
index 0fdbc97e380e9..a4d13ef06a355 100644
--- a/tests/baselines/reference/overloadOnConstNoStringImplementation.types
+++ b/tests/baselines/reference/overloadOnConstNoStringImplementation.types
@@ -50,7 +50,7 @@ function x2(a: number, cb: (x: any) => number) {
 var cb: (number) => number = (x: number) => 1;
 >cb : (number: any) => number
 >number : any
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
@@ -64,7 +64,7 @@ x2(1, (x: 'hi') => 1); // error
 >x2(1, (x: 'hi') => 1) : any
 >x2 : { (a: number, cb: (x: "hi") => number): any; (a: number, cb: (x: "bye") => number): any; }
 >1 : 1
->(x: 'hi') => 1 : (x: "hi") => number
+>(x: 'hi') => 1 : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
@@ -72,7 +72,7 @@ x2(1, (x: string) => 1);
 >x2(1, (x: string) => 1) : any
 >x2 : { (a: number, cb: (x: "hi") => number): any; (a: number, cb: (x: "bye") => number): any; }
 >1 : 1
->(x: string) => 1 : (x: string) => number
+>(x: string) => 1 : (x: string) => 1
 >x : string
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadOnConstNoStringImplementation2.errors.txt b/tests/baselines/reference/overloadOnConstNoStringImplementation2.errors.txt
index e7ac72eb0520b..90081d9259b68 100644
--- a/tests/baselines/reference/overloadOnConstNoStringImplementation2.errors.txt
+++ b/tests/baselines/reference/overloadOnConstNoStringImplementation2.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/compiler/overloadOnConstNoStringImplementation2.ts(18,9): error TS2345: Argument of type '(x: "bye") => number' is not assignable to parameter of type '(x: "hi") => number'.
+tests/cases/compiler/overloadOnConstNoStringImplementation2.ts(18,9): error TS2345: Argument of type '(x: "bye") => 1' is not assignable to parameter of type '(x: "hi") => number'.
   Types of parameters 'x' and 'x' are incompatible.
     Type '"hi"' is not assignable to type '"bye"'.
-tests/cases/compiler/overloadOnConstNoStringImplementation2.ts(20,9): error TS2345: Argument of type '(x: number) => number' is not assignable to parameter of type '(x: "hi") => number'.
+tests/cases/compiler/overloadOnConstNoStringImplementation2.ts(20,9): error TS2345: Argument of type '(x: number) => 1' is not assignable to parameter of type '(x: "hi") => number'.
   Types of parameters 'x' and 'x' are incompatible.
     Type '"hi"' is not assignable to type 'number'.
 
@@ -26,12 +26,12 @@ tests/cases/compiler/overloadOnConstNoStringImplementation2.ts(20,9): error TS23
     c.x1(1, (x: 'hi') => { return 1; } );
     c.x1(1, (x: 'bye') => { return 1; } ); 
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(x: "bye") => number' is not assignable to parameter of type '(x: "hi") => number'.
+!!! error TS2345: Argument of type '(x: "bye") => 1' is not assignable to parameter of type '(x: "hi") => number'.
 !!! error TS2345:   Types of parameters 'x' and 'x' are incompatible.
 !!! error TS2345:     Type '"hi"' is not assignable to type '"bye"'.
     c.x1(1, (x: string) => { return 1; } );
     c.x1(1, (x: number) => { return 1; } );
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(x: number) => number' is not assignable to parameter of type '(x: "hi") => number'.
+!!! error TS2345: Argument of type '(x: number) => 1' is not assignable to parameter of type '(x: "hi") => number'.
 !!! error TS2345:   Types of parameters 'x' and 'x' are incompatible.
 !!! error TS2345:     Type '"hi"' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/overloadOnConstNoStringImplementation2.types b/tests/baselines/reference/overloadOnConstNoStringImplementation2.types
index dd46d3fcd6576..3b16f1ee03ba3 100644
--- a/tests/baselines/reference/overloadOnConstNoStringImplementation2.types
+++ b/tests/baselines/reference/overloadOnConstNoStringImplementation2.types
@@ -61,7 +61,7 @@ c.x1(1, (x: 'hi') => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: 'hi') => { return 1; } : (x: "hi") => number
+>(x: 'hi') => { return 1; } : (x: "hi") => 1
 >x : "hi"
 >1 : 1
 
@@ -71,7 +71,7 @@ c.x1(1, (x: 'bye') => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: 'bye') => { return 1; } : (x: "bye") => number
+>(x: 'bye') => { return 1; } : (x: "bye") => 1
 >x : "bye"
 >1 : 1
 
@@ -81,7 +81,7 @@ c.x1(1, (x: string) => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: string) => { return 1; } : (x: string) => number
+>(x: string) => { return 1; } : (x: string) => 1
 >x : string
 >1 : 1
 
@@ -91,7 +91,7 @@ c.x1(1, (x: number) => { return 1; } );
 >c : C
 >x1 : (a: number, callback: (x: "hi") => number) => any
 >1 : 1
->(x: number) => { return 1; } : (x: number) => number
+>(x: number) => { return 1; } : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadResolutionOverNonCTObjectLit.types b/tests/baselines/reference/overloadResolutionOverNonCTObjectLit.types
index d5a06781eec55..776e55a023970 100644
--- a/tests/baselines/reference/overloadResolutionOverNonCTObjectLit.types
+++ b/tests/baselines/reference/overloadResolutionOverNonCTObjectLit.types
@@ -44,7 +44,7 @@ module Bugs {
 >tokens.push : (...items: IToken[]) => number
 >tokens : IToken[]
 >push : (...items: IToken[]) => number
->{ startIndex: 1, type: '', bracket: 3 } : { startIndex: number; type: string; bracket: number; }
+>{ startIndex: 1, type: '', bracket: 3 } : { startIndex: 1; type: ""; bracket: 3; }
 >startIndex : number
 >1 : 1
 >type : string
@@ -59,8 +59,8 @@ module Bugs {
 >push : (...items: IToken[]) => number
 ><IToken>({ startIndex: 1, type: '', bracket: 3, state: null, length: 10 }) : IToken
 >IToken : IToken
->({ startIndex: 1, type: '', bracket: 3, state: null, length: 10 }) : { startIndex: number; type: string; bracket: number; state: null; length: number; }
->{ startIndex: 1, type: '', bracket: 3, state: null, length: 10 } : { startIndex: number; type: string; bracket: number; state: null; length: number; }
+>({ startIndex: 1, type: '', bracket: 3, state: null, length: 10 }) : { startIndex: 1; type: ""; bracket: 3; state: null; length: number; }
+>{ startIndex: 1, type: '', bracket: 3, state: null, length: 10 } : { startIndex: 1; type: ""; bracket: 3; state: null; length: number; }
 >startIndex : number
 >1 : 1
 >type : string
diff --git a/tests/baselines/reference/overloadResolutionTest1.errors.txt b/tests/baselines/reference/overloadResolutionTest1.errors.txt
index 8852f8638650a..b36684db501d8 100644
--- a/tests/baselines/reference/overloadResolutionTest1.errors.txt
+++ b/tests/baselines/reference/overloadResolutionTest1.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/compiler/overloadResolutionTest1.ts(7,16): error TS2345: Argument of type '{ a: "s"; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
-  Type '{ a: "s"; }' is not assignable to type '{ a: boolean; }'.
+tests/cases/compiler/overloadResolutionTest1.ts(7,16): error TS2345: Argument of type '{ a: string; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
+  Type '{ a: string; }' is not assignable to type '{ a: boolean; }'.
     Types of property 'a' are incompatible.
-      Type '"s"' is not assignable to type 'boolean'.
-tests/cases/compiler/overloadResolutionTest1.ts(18,15): error TS2345: Argument of type '{ a: "s"; }' is not assignable to parameter of type '{ a: boolean; }'.
+      Type 'string' is not assignable to type 'boolean'.
+tests/cases/compiler/overloadResolutionTest1.ts(18,15): error TS2345: Argument of type '{ a: string; }' is not assignable to parameter of type '{ a: boolean; }'.
   Types of property 'a' are incompatible.
-    Type '"s"' is not assignable to type 'boolean'.
+    Type 'string' is not assignable to type 'boolean'.
 tests/cases/compiler/overloadResolutionTest1.ts(24,14): error TS2345: Argument of type '{ a: boolean; }' is not assignable to parameter of type '{ a: string; }'.
   Types of property 'a' are incompatible.
     Type 'boolean' is not assignable to type 'string'.
@@ -19,10 +19,10 @@ tests/cases/compiler/overloadResolutionTest1.ts(24,14): error TS2345: Argument o
     var x11 = foo([{a:0}]); // works
     var x111 = foo([{a:"s"}]); // error - does not match any signature
                    ~~~~~~~~~
-!!! error TS2345: Argument of type '{ a: "s"; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
-!!! error TS2345:   Type '{ a: "s"; }' is not assignable to type '{ a: boolean; }'.
+!!! error TS2345: Argument of type '{ a: string; }[]' is not assignable to parameter of type '{ a: boolean; }[]'.
+!!! error TS2345:   Type '{ a: string; }' is not assignable to type '{ a: boolean; }'.
 !!! error TS2345:     Types of property 'a' are incompatible.
-!!! error TS2345:       Type '"s"' is not assignable to type 'boolean'.
+!!! error TS2345:       Type 'string' is not assignable to type 'boolean'.
     var x1111 = foo([{a:null}]); // works - ambiguous call is resolved to be the first in the overload set so this returns a string
     
     
@@ -35,9 +35,9 @@ tests/cases/compiler/overloadResolutionTest1.ts(24,14): error TS2345: Argument o
     var x3 = foo2({a:true}); // works
     var x4 = foo2({a:"s"}); // error
                   ~~~~~~~
-!!! error TS2345: Argument of type '{ a: "s"; }' is not assignable to parameter of type '{ a: boolean; }'.
+!!! error TS2345: Argument of type '{ a: string; }' is not assignable to parameter of type '{ a: boolean; }'.
 !!! error TS2345:   Types of property 'a' are incompatible.
-!!! error TS2345:     Type '"s"' is not assignable to type 'boolean'.
+!!! error TS2345:     Type 'string' is not assignable to type 'boolean'.
     
     
     function foo4(bar:{a:number;}):number;
diff --git a/tests/baselines/reference/overloadResolutionTest1.types b/tests/baselines/reference/overloadResolutionTest1.types
index 8ff83bd66d56d..a034dcd492a00 100644
--- a/tests/baselines/reference/overloadResolutionTest1.types
+++ b/tests/baselines/reference/overloadResolutionTest1.types
@@ -28,8 +28,8 @@ var x11 = foo([{a:0}]); // works
 >x11 : string
 >foo([{a:0}]) : string
 >foo : { (bar: { a: number; }[]): string; (bar: { a: boolean; }[]): number; }
->[{a:0}] : { a: number; }[]
->{a:0} : { a: number; }
+>[{a:0}] : { a: 0; }[]
+>{a:0} : { a: 0; }
 >a : number
 >0 : 0
 
@@ -73,7 +73,7 @@ var x2 = foo2({a:0}); // works
 >x2 : string
 >foo2({a:0}) : string
 >foo2 : { (bar: { a: number; }): string; (bar: { a: boolean; }): number; }
->{a:0} : { a: number; }
+>{a:0} : { a: 0; }
 >a : number
 >0 : 0
 
diff --git a/tests/baselines/reference/overloadWithCallbacksWithDifferingOptionalityOnArgs.types b/tests/baselines/reference/overloadWithCallbacksWithDifferingOptionalityOnArgs.types
index 9b44e197cd8e5..5cf070df0fe92 100644
--- a/tests/baselines/reference/overloadWithCallbacksWithDifferingOptionalityOnArgs.types
+++ b/tests/baselines/reference/overloadWithCallbacksWithDifferingOptionalityOnArgs.types
@@ -17,13 +17,13 @@ function x2(callback: (x: any) => number) { }
 x2(() => 1);
 >x2(() => 1) : any
 >x2 : { (callback: (x?: number) => number): any; (callback: (x: string) => number): any; }
->() => 1 : () => number
+>() => 1 : () => 1
 >1 : 1
 
 x2((x) => 1 );
 >x2((x) => 1 ) : any
 >x2 : { (callback: (x?: number) => number): any; (callback: (x: string) => number): any; }
->(x) => 1 : (x: number) => number
+>(x) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/overloadsWithProvisionalErrors.types b/tests/baselines/reference/overloadsWithProvisionalErrors.types
index c655f22c05070..771f5e77f0a9d 100644
--- a/tests/baselines/reference/overloadsWithProvisionalErrors.types
+++ b/tests/baselines/reference/overloadsWithProvisionalErrors.types
@@ -24,10 +24,10 @@ func(s => ({})); // Error for no applicable overload (object type is missing a a
 func(s => ({ a: blah, b: 3 })); // Only error inside the function, but not outside (since it would be applicable if not for the provisional error)
 >func(s => ({ a: blah, b: 3 })) : string
 >func : { (s: string): number; (lambda: (s: string) => { a: number; b: number; }): string; }
->s => ({ a: blah, b: 3 }) : (s: string) => { a: any; b: number; }
+>s => ({ a: blah, b: 3 }) : (s: string) => { a: any; b: 3; }
 >s : string
->({ a: blah, b: 3 }) : { a: any; b: number; }
->{ a: blah, b: 3 } : { a: any; b: number; }
+>({ a: blah, b: 3 }) : { a: any; b: 3; }
+>{ a: blah, b: 3 } : { a: any; b: 3; }
 >a : any
 >blah : any
 >b : number
diff --git a/tests/baselines/reference/overrideBaseIntersectionMethod.types b/tests/baselines/reference/overrideBaseIntersectionMethod.types
index b5412b18c0707..9d9ef64cd1e5c 100644
--- a/tests/baselines/reference/overrideBaseIntersectionMethod.types
+++ b/tests/baselines/reference/overrideBaseIntersectionMethod.types
@@ -55,7 +55,7 @@ class Point {
 >getLocation : () => [number, number]
 
     return [0,0];
->[0,0] : [number, number]
+>[0,0] : [0, 0]
 >0 : 0
 >0 : 0
   }
diff --git a/tests/baselines/reference/plusOperatorWithNumberType.types b/tests/baselines/reference/plusOperatorWithNumberType.types
index 6d630b1d6c7b1..1d42f504d8439 100644
--- a/tests/baselines/reference/plusOperatorWithNumberType.types
+++ b/tests/baselines/reference/plusOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/plusOperatorWithStringType.types b/tests/baselines/reference/plusOperatorWithStringType.types
index ec19aaed49710..9d6dc98fe1783 100644
--- a/tests/baselines/reference/plusOperatorWithStringType.types
+++ b/tests/baselines/reference/plusOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/promiseVoidErrorCallback.types b/tests/baselines/reference/promiseVoidErrorCallback.types
index bd1b3a87c2603..d57b26c514a3a 100644
--- a/tests/baselines/reference/promiseVoidErrorCallback.types
+++ b/tests/baselines/reference/promiseVoidErrorCallback.types
@@ -30,7 +30,7 @@ function f1(): Promise<T1> {
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->{ __t1: "foo_t1" } : { __t1: string; }
+>{ __t1: "foo_t1" } : { __t1: "foo_t1"; }
 >__t1 : string
 >"foo_t1" : "foo_t1"
 }
diff --git a/tests/baselines/reference/propertyAccess.errors.txt b/tests/baselines/reference/propertyAccess.errors.txt
index 2ac87bc0e3e8f..d8103aefca94f 100644
--- a/tests/baselines/reference/propertyAccess.errors.txt
+++ b/tests/baselines/reference/propertyAccess.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(11,55): error TS2322: Type '{ 3: string; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
+tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(11,55): error TS2322: Type '{ 3: "three"; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
   Object literal may only specify known properties, and ''three'' does not exist in type '{ [n: number]: string; }'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(45,14): error TS2339: Property 'qqq' does not exist on type '{ 10: string; x: string; y: number; z: { n: string; m: number; o: () => boolean; }; 'literal property': number; }'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(80,19): error TS2538: Type '{ name: string; }' cannot be used as an index type.
@@ -20,7 +20,7 @@ tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(149,5): err
     
     var numIndex: { [n: number]: string } = { 3: 'three', 'three': 'three' };
                                                           ~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ 3: string; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
+!!! error TS2322: Type '{ 3: "three"; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
 !!! error TS2322:   Object literal may only specify known properties, and ''three'' does not exist in type '{ [n: number]: string; }'.
     var strIndex: { [n: string]: Compass } = { 'N': Compass.North, 'E': Compass.East };
     var bothIndex:
diff --git a/tests/baselines/reference/propertyAccess.types b/tests/baselines/reference/propertyAccess.types
index eeb14e4696046..32bf0e9468247 100644
--- a/tests/baselines/reference/propertyAccess.types
+++ b/tests/baselines/reference/propertyAccess.types
@@ -25,7 +25,7 @@ enum Compass {
 var numIndex: { [n: number]: string } = { 3: 'three', 'three': 'three' };
 >numIndex : { [n: number]: string; }
 >n : number
->{ 3: 'three', 'three': 'three' } : { 3: string; 'three': string; }
+>{ 3: 'three', 'three': 'three' } : { 3: "three"; 'three': string; }
 >'three' : "three"
 >'three' : "three"
 
diff --git a/tests/baselines/reference/readonlyMembers.types b/tests/baselines/reference/readonlyMembers.types
index 7b0c568caeb0a..2245eab1b700f 100644
--- a/tests/baselines/reference/readonlyMembers.types
+++ b/tests/baselines/reference/readonlyMembers.types
@@ -11,7 +11,7 @@ interface X {
 var x: X = { a: 0 };
 >x : X
 >X : X
->{ a: 0 } : { a: number; }
+>{ a: 0 } : { a: 0; }
 >a : number
 >0 : 0
 
@@ -152,7 +152,7 @@ var p: { readonly a: number, b: number } = { a: 1, b: 1 };
 >p : { readonly a: number; b: number; }
 >a : number
 >b : number
->{ a: 1, b: 1 } : { a: number; b: number; }
+>{ a: 1, b: 1 } : { a: 1; b: 1; }
 >a : number
 >1 : 1
 >b : number
diff --git a/tests/baselines/reference/restArgAssignmentCompat.types b/tests/baselines/reference/restArgAssignmentCompat.types
index ccccb83134939..2d8c8c086642b 100644
--- a/tests/baselines/reference/restArgAssignmentCompat.types
+++ b/tests/baselines/reference/restArgAssignmentCompat.types
@@ -38,7 +38,7 @@ n = f;
 n([4], 'foo');
 >n([4], 'foo') : void
 >n : (x: number[], y: string) => void
->[4] : number[]
+>[4] : 4[]
 >4 : 4
 >'foo' : "foo"
 
diff --git a/tests/baselines/reference/restElementMustBeLast.types b/tests/baselines/reference/restElementMustBeLast.types
index 12e5ec84abefe..12e5379ba5896 100644
--- a/tests/baselines/reference/restElementMustBeLast.types
+++ b/tests/baselines/reference/restElementMustBeLast.types
@@ -8,12 +8,12 @@ var [...a, x] = [1, 2, 3];  // Error, rest must be last element
 >3 : 3
 
 [...a, x] = [1, 2, 3];      // Error, rest must be last element
->[...a, x] = [1, 2, 3] : number[]
+>[...a, x] = [1, 2, 3] : (1 | 2 | 3)[]
 >[...a, x] : number[]
 >...a : number
 >a : number[]
 >x : number
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/restElementWithAssignmentPattern1.errors.txt b/tests/baselines/reference/restElementWithAssignmentPattern1.errors.txt
index 2e1046c9317f5..fa391c75ea180 100644
--- a/tests/baselines/reference/restElementWithAssignmentPattern1.errors.txt
+++ b/tests/baselines/reference/restElementWithAssignmentPattern1.errors.txt
@@ -1,15 +1,15 @@
-tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern1.ts(2,6): error TS2322: Type 'string | number' is not assignable to type 'string'.
-  Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern1.ts(2,9): error TS2322: Type 'string | number' is not assignable to type 'number'.
-  Type 'string' is not assignable to type 'number'.
+tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern1.ts(2,6): error TS2322: Type '"" | 1' is not assignable to type 'string'.
+  Type '1' is not assignable to type 'string'.
+tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern1.ts(2,9): error TS2322: Type '"" | 1' is not assignable to type 'number'.
+  Type '""' is not assignable to type 'number'.
 
 
 ==== tests/cases/conformance/es6/destructuring/restElementWithAssignmentPattern1.ts (2 errors) ====
     var a: string, b: number;
     [...[a, b = 0]] = ["", 1];
          ~
-!!! error TS2322: Type 'string | number' is not assignable to type 'string'.
-!!! error TS2322:   Type 'number' is not assignable to type 'string'.
+!!! error TS2322: Type '"" | 1' is not assignable to type 'string'.
+!!! error TS2322:   Type '1' is not assignable to type 'string'.
             ~
-!!! error TS2322: Type 'string | number' is not assignable to type 'number'.
-!!! error TS2322:   Type 'string' is not assignable to type 'number'.
\ No newline at end of file
+!!! error TS2322: Type '"" | 1' is not assignable to type 'number'.
+!!! error TS2322:   Type '""' is not assignable to type 'number'.
\ No newline at end of file
diff --git a/tests/baselines/reference/restElementWithAssignmentPattern1.types b/tests/baselines/reference/restElementWithAssignmentPattern1.types
index 3740fc66343d0..05f4a81853787 100644
--- a/tests/baselines/reference/restElementWithAssignmentPattern1.types
+++ b/tests/baselines/reference/restElementWithAssignmentPattern1.types
@@ -4,7 +4,7 @@ var a: string, b: number;
 >b : number
 
 [...[a, b = 0]] = ["", 1];
->[...[a, b = 0]] = ["", 1] : (string | number)[]
+>[...[a, b = 0]] = ["", 1] : ("" | 1)[]
 >[...[a, b = 0]] : (string | number)[]
 >...[a, b = 0] : string | number
 >[a, b = 0] : [string, number]
@@ -12,7 +12,7 @@ var a: string, b: number;
 >b = 0 : 0
 >b : number
 >0 : 0
->["", 1] : (string | number)[]
+>["", 1] : ("" | 1)[]
 >"" : ""
 >1 : 1
 
diff --git a/tests/baselines/reference/restElementWithAssignmentPattern3.types b/tests/baselines/reference/restElementWithAssignmentPattern3.types
index c2e01bc441455..f18b9ff81782f 100644
--- a/tests/baselines/reference/restElementWithAssignmentPattern3.types
+++ b/tests/baselines/reference/restElementWithAssignmentPattern3.types
@@ -5,7 +5,7 @@ var a: string, b: number;
 
 var tuple: [string, number] = ["", 1];
 >tuple : [string, number]
->["", 1] : [string, number]
+>["", 1] : ["", 1]
 >"" : ""
 >1 : 1
 
diff --git a/tests/baselines/reference/restElementWithAssignmentPattern4.types b/tests/baselines/reference/restElementWithAssignmentPattern4.types
index f29dd1b219c28..800967cd07309 100644
--- a/tests/baselines/reference/restElementWithAssignmentPattern4.types
+++ b/tests/baselines/reference/restElementWithAssignmentPattern4.types
@@ -5,7 +5,7 @@ var a: string, b: number;
 
 var tuple: [string, number] = ["", 1];
 >tuple : [string, number]
->["", 1] : [string, number]
+>["", 1] : ["", 1]
 >"" : ""
 >1 : 1
 
diff --git a/tests/baselines/reference/restElementWithAssignmentPattern5.types b/tests/baselines/reference/restElementWithAssignmentPattern5.types
index 298bc2e4363f6..9b444f316ce32 100644
--- a/tests/baselines/reference/restElementWithAssignmentPattern5.types
+++ b/tests/baselines/reference/restElementWithAssignmentPattern5.types
@@ -4,13 +4,13 @@ var s: string, s2: string;
 >s2 : string
 
 [...[s, s2]] = ["", ""];
->[...[s, s2]] = ["", ""] : string[]
+>[...[s, s2]] = ["", ""] : ""[]
 >[...[s, s2]] : string[]
 >...[s, s2] : string
 >[s, s2] : [string, string]
 >s : string
 >s2 : string
->["", ""] : string[]
+>["", ""] : ""[]
 >"" : ""
 >"" : ""
 
diff --git a/tests/baselines/reference/returnInConstructor1.types b/tests/baselines/reference/returnInConstructor1.types
index 007271ddf4b04..ecde44f65bac2 100644
--- a/tests/baselines/reference/returnInConstructor1.types
+++ b/tests/baselines/reference/returnInConstructor1.types
@@ -54,7 +54,7 @@ class E {
 
     constructor() {
         return { foo: 1 };
->{ foo: 1 } : { foo: number; }
+>{ foo: 1 } : { foo: 1; }
 >foo : number
 >1 : 1
     }
diff --git a/tests/baselines/reference/returnStatements.types b/tests/baselines/reference/returnStatements.types
index b75104dd666ab..e52c34b426fd1 100644
--- a/tests/baselines/reference/returnStatements.types
+++ b/tests/baselines/reference/returnStatements.types
@@ -57,7 +57,7 @@ class D extends C {
 function fn10(): I { return { id: 12 }; } 
 >fn10 : () => I
 >I : I
->{ id: 12 } : { id: number; }
+>{ id: 12 } : { id: 12; }
 >id : number
 >12 : 12
 
diff --git a/tests/baselines/reference/shadowingViaLocalValueOrBindingElement.types b/tests/baselines/reference/shadowingViaLocalValueOrBindingElement.types
index 46e8eb601f1c3..139b42565452a 100644
--- a/tests/baselines/reference/shadowingViaLocalValueOrBindingElement.types
+++ b/tests/baselines/reference/shadowingViaLocalValueOrBindingElement.types
@@ -15,7 +15,7 @@ if (true) {
         var { x = 0 } = { x: 0 }; // Error
 >x : number
 >0 : 0
->{ x: 0 } : { x?: number; }
+>{ x: 0 } : { x?: 0; }
 >x : number
 >0 : 0
 
@@ -23,7 +23,7 @@ if (true) {
 >x : any
 >x : number
 >0 : 0
->{ x: 0 } : { x?: number; }
+>{ x: 0 } : { x?: 0; }
 >x : number
 >0 : 0
 
diff --git a/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring.types b/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring.types
index 864a04d7b82a2..d7c637ec0b36d 100644
--- a/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring.types
+++ b/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring.types
@@ -168,14 +168,14 @@
 >y : any
 
 	({ y:y = 5 } = { y: 1 })
->({ y:y = 5 } = { y: 1 }) : { y?: number; }
->{ y:y = 5 } = { y: 1 } : { y?: number; }
+>({ y:y = 5 } = { y: 1 }) : { y?: 1; }
+>{ y:y = 5 } = { y: 1 } : { y?: 1; }
 >{ y:y = 5 } : { y?: number; }
 >y : number
 >y = 5 : 5
 >y : any
 >5 : 5
->{ y: 1 } : { y?: number; }
+>{ y: 1 } : { y?: 1; }
 >y : number
 >1 : 1
 
@@ -189,11 +189,11 @@
 >y0 : number
 
 	({ y0 = 5 } = { y0: 1 })
->({ y0 = 5 } = { y0: 1 }) : { y0?: number; }
->{ y0 = 5 } = { y0: 1 } : { y0?: number; }
+>({ y0 = 5 } = { y0: 1 }) : { y0?: 1; }
+>{ y0 = 5 } = { y0: 1 } : { y0?: 1; }
 >{ y0 = 5 } : { y0?: number; }
 >y0 : number
->{ y0: 1 } : { y0?: number; }
+>{ y0: 1 } : { y0?: 1; }
 >y0 : number
 >1 : 1
 
@@ -207,14 +207,14 @@
 >y0 : number
 
 	({ y0:y0 = 5 } = { y0: 1 })
->({ y0:y0 = 5 } = { y0: 1 }) : { y0?: number; }
->{ y0:y0 = 5 } = { y0: 1 } : { y0?: number; }
+>({ y0:y0 = 5 } = { y0: 1 }) : { y0?: 1; }
+>{ y0:y0 = 5 } = { y0: 1 } : { y0?: 1; }
 >{ y0:y0 = 5 } : { y0?: number; }
 >y0 : number
 >y0 = 5 : 5
 >y0 : number
 >5 : 5
->{ y0: 1 } : { y0?: number; }
+>{ y0: 1 } : { y0?: 1; }
 >y0 : number
 >1 : 1
 
@@ -336,20 +336,20 @@
 >x : number
 
 	({ y4:y4 = 5, y5:y5 = { x: 1 } } = {})
->({ y4:y4 = 5, y5:y5 = { x: 1 } } = {}) : { y4?: number; y5?: { x: number; }; }
->{ y4:y4 = 5, y5:y5 = { x: 1 } } = {} : { y4?: number; y5?: { x: number; }; }
->{ y4:y4 = 5, y5:y5 = { x: 1 } } : { y4?: number; y5?: { x: number; }; }
+>({ y4:y4 = 5, y5:y5 = { x: 1 } } = {}) : { y4?: number; y5?: { x: 1; }; }
+>{ y4:y4 = 5, y5:y5 = { x: 1 } } = {} : { y4?: number; y5?: { x: 1; }; }
+>{ y4:y4 = 5, y5:y5 = { x: 1 } } : { y4?: number; y5?: { x: 1; }; }
 >y4 : number
 >y4 = 5 : 5
 >y4 : number
 >5 : 5
+>y5 : { x: 1; }
+>y5 = { x: 1 } : { x: 1; }
 >y5 : { x: number; }
->y5 = { x: 1 } : { x: number; }
->y5 : { x: number; }
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
->{} : { y4?: number; y5?: { x: number; }; }
+>{} : { y4?: number; y5?: { x: 1; }; }
 
 });
 
@@ -386,8 +386,8 @@
 >z : any
 
 	({ z:z = { x: 5 } } = { z: { x: 1 } });
->({ z:z = { x: 5 } } = { z: { x: 1 } }) : { z?: { x: number; }; }
->{ z:z = { x: 5 } } = { z: { x: 1 } } : { z?: { x: number; }; }
+>({ z:z = { x: 5 } } = { z: { x: 1 } }) : { z?: { x: 1; }; }
+>{ z:z = { x: 5 } } = { z: { x: 1 } } : { z?: { x: 1; }; }
 >{ z:z = { x: 5 } } : { z?: { x: number; }; }
 >z : { x: number; }
 >z = { x: 5 } : { x: number; }
@@ -395,9 +395,9 @@
 >{ x: 5 } : { x: number; }
 >x : number
 >5 : 5
->{ z: { x: 1 } } : { z?: { x: number; }; }
->z : { x: number; }
->{ x: 1 } : { x: number; }
+>{ z: { x: 1 } } : { z?: { x: 1; }; }
+>z : { x: 1; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring_ES6.types b/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring_ES6.types
index 939d9864fd086..a04b1c9100019 100644
--- a/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring_ES6.types
+++ b/tests/baselines/reference/shorthandPropertyAssignmentsInDestructuring_ES6.types
@@ -168,14 +168,14 @@
 >y : any
 
 	({ y:y = 5 } = { y: 1 })
->({ y:y = 5 } = { y: 1 }) : { y?: number; }
->{ y:y = 5 } = { y: 1 } : { y?: number; }
+>({ y:y = 5 } = { y: 1 }) : { y?: 1; }
+>{ y:y = 5 } = { y: 1 } : { y?: 1; }
 >{ y:y = 5 } : { y?: number; }
 >y : number
 >y = 5 : 5
 >y : any
 >5 : 5
->{ y: 1 } : { y?: number; }
+>{ y: 1 } : { y?: 1; }
 >y : number
 >1 : 1
 
@@ -189,11 +189,11 @@
 >y0 : number
 
 	({ y0 = 5 } = { y0: 1 })
->({ y0 = 5 } = { y0: 1 }) : { y0?: number; }
->{ y0 = 5 } = { y0: 1 } : { y0?: number; }
+>({ y0 = 5 } = { y0: 1 }) : { y0?: 1; }
+>{ y0 = 5 } = { y0: 1 } : { y0?: 1; }
 >{ y0 = 5 } : { y0?: number; }
 >y0 : number
->{ y0: 1 } : { y0?: number; }
+>{ y0: 1 } : { y0?: 1; }
 >y0 : number
 >1 : 1
 
@@ -207,14 +207,14 @@
 >y0 : number
 
 	({ y0:y0 = 5 } = { y0: 1 })
->({ y0:y0 = 5 } = { y0: 1 }) : { y0?: number; }
->{ y0:y0 = 5 } = { y0: 1 } : { y0?: number; }
+>({ y0:y0 = 5 } = { y0: 1 }) : { y0?: 1; }
+>{ y0:y0 = 5 } = { y0: 1 } : { y0?: 1; }
 >{ y0:y0 = 5 } : { y0?: number; }
 >y0 : number
 >y0 = 5 : 5
 >y0 : number
 >5 : 5
->{ y0: 1 } : { y0?: number; }
+>{ y0: 1 } : { y0?: 1; }
 >y0 : number
 >1 : 1
 
@@ -336,20 +336,20 @@
 >x : number
 
 	({ y4:y4 = 5, y5:y5 = { x: 1 } } = {})
->({ y4:y4 = 5, y5:y5 = { x: 1 } } = {}) : { y4?: number; y5?: { x: number; }; }
->{ y4:y4 = 5, y5:y5 = { x: 1 } } = {} : { y4?: number; y5?: { x: number; }; }
->{ y4:y4 = 5, y5:y5 = { x: 1 } } : { y4?: number; y5?: { x: number; }; }
+>({ y4:y4 = 5, y5:y5 = { x: 1 } } = {}) : { y4?: number; y5?: { x: 1; }; }
+>{ y4:y4 = 5, y5:y5 = { x: 1 } } = {} : { y4?: number; y5?: { x: 1; }; }
+>{ y4:y4 = 5, y5:y5 = { x: 1 } } : { y4?: number; y5?: { x: 1; }; }
 >y4 : number
 >y4 = 5 : 5
 >y4 : number
 >5 : 5
+>y5 : { x: 1; }
+>y5 = { x: 1 } : { x: 1; }
 >y5 : { x: number; }
->y5 = { x: 1 } : { x: number; }
->y5 : { x: number; }
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
->{} : { y4?: number; y5?: { x: number; }; }
+>{} : { y4?: number; y5?: { x: 1; }; }
 
 });
 
@@ -386,8 +386,8 @@
 >z : any
 
 	({ z:z = { x: 5 } } = { z: { x: 1 } });
->({ z:z = { x: 5 } } = { z: { x: 1 } }) : { z?: { x: number; }; }
->{ z:z = { x: 5 } } = { z: { x: 1 } } : { z?: { x: number; }; }
+>({ z:z = { x: 5 } } = { z: { x: 1 } }) : { z?: { x: 1; }; }
+>{ z:z = { x: 5 } } = { z: { x: 1 } } : { z?: { x: 1; }; }
 >{ z:z = { x: 5 } } : { z?: { x: number; }; }
 >z : { x: number; }
 >z = { x: 5 } : { x: number; }
@@ -395,9 +395,9 @@
 >{ x: 5 } : { x: number; }
 >x : number
 >5 : 5
->{ z: { x: 1 } } : { z?: { x: number; }; }
->z : { x: number; }
->{ x: 1 } : { x: number; }
+>{ z: { x: 1 } } : { z?: { x: 1; }; }
+>z : { x: 1; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
index 00ecd2659eead..3e781d663b85d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -30,18 +30,18 @@ function getRobot() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
index f317fa2a83cfd..9bb0370f10c35 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPattern2.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -30,18 +30,18 @@ function getRobot() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -124,11 +124,11 @@ for ([, nameA] = getRobot(), i = 0; i < 1; i++) {
 }
 for ([, nameA] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[, nameA] = [2, "trimmer", "trimming"], i = 0 : 0
->[, nameA] = [2, "trimmer", "trimming"] : [number, string, string]
+>[, nameA] = [2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >[, nameA] : [undefined, string]
 > : undefined
 >nameA : string
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -201,15 +201,15 @@ for ([, [primarySkillA, secondarySkillA]] = getMultiRobot(), i = 0; i < 1; i++)
 }
 for ([, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
 >[, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>[, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]] : [string, ["trimming", "edging"]]
 >[, [primarySkillA, secondarySkillA]] : [undefined, [string, string]]
 > : undefined
 >[primarySkillA, secondarySkillA] : [string, string]
 >primarySkillA : string
 >secondarySkillA : string
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : [string, ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -276,10 +276,10 @@ for ([numberB] = getRobot(), i = 0; i < 1; i++) {
 }
 for ([numberB] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberB] = [2, "trimmer", "trimming"], i = 0 : 0
->[numberB] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB] = [2, "trimmer", "trimming"] : [2, string, string]
 >[numberB] : [number]
 >numberB : number
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -346,12 +346,12 @@ for ([nameB] = getMultiRobot(), i = 0; i < 1; i++) {
 }
 for ([nameB] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
 >[nameB] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[nameB] = ["trimmer", ["trimming", "edging"]] : [string, string[]]
+>[nameB] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >[nameB] : [string]
 >nameB : string
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -422,12 +422,12 @@ for ([numberA2, nameA2, skillA2] = getRobot(), i = 0; i < 1; i++) {
 }
 for ([numberA2, nameA2, skillA2] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberA2, nameA2, skillA2] = [2, "trimmer", "trimming"], i = 0 : 0
->[numberA2, nameA2, skillA2] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberA2, nameA2, skillA2] = [2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >[numberA2, nameA2, skillA2] : [number, string, string]
 >numberA2 : number
 >nameA2 : string
 >skillA2 : string
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -500,15 +500,15 @@ for ([nameMA, [primarySkillA, secondarySkillA]] = getMultiRobot(), i = 0; i < 1;
 }
 for ([nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
 >[nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>[nameMA, [primarySkillA, secondarySkillA]] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >[nameMA, [primarySkillA, secondarySkillA]] : [string, [string, string]]
 >nameMA : string
 >[primarySkillA, secondarySkillA] : [string, string]
 >primarySkillA : string
 >secondarySkillA : string
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -586,7 +586,7 @@ for ([numberA3, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0; i < 1
 >robotAInfo : (string | number)[]
 ><Robot>[2, "trimmer", "trimming"] : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -661,9 +661,9 @@ for ([...multiRobotAInfo] = <MultiSkilledRobot>["trimmer", ["trimming", "edging"
 >multiRobotAInfo : (string | [string, string])[]
 ><MultiSkilledRobot>["trimmer", ["trimming", "edging"]] : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
index 443f22bbab813..c991a0e12c22d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, string[]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -30,18 +30,18 @@ function getRobot() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["mower", ["mowing", ""]] : [string, string[]]
+>["mower", ["mowing", ""]] : ["mower", ("mowing" | "")[]]
 >"mower" : "mower"
->["mowing", ""] : string[]
+>["mowing", ""] : ("mowing" | "")[]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -97,7 +97,7 @@ for (let [, nameA = "name"] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 > : undefined
 >nameA : string
 >"name" : "name"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [number, "trimmer", string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -128,7 +128,7 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = multiRobotA, i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 >multiRobotA : [string, string[]]
@@ -159,7 +159,7 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = getMultiRobot(), i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 >getMultiRobot() : [string, string[]]
@@ -191,12 +191,12 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : [string, ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i : number
@@ -260,7 +260,7 @@ for (let [numberB = -1] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >numberB : number
 >-1 : -1
 >1 : 1
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -321,9 +321,9 @@ for (let [nameB = "name"] = getMultiRobot(), i = 0; i < 1; i++) {
 for (let [nameB = "name"] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
 >nameB : string
 >"name" : "name"
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i : number
@@ -399,7 +399,7 @@ for (let [numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "t
 >"name" : "name"
 >skillA2 : string
 >"skill" : "skill"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -433,7 +433,7 @@ for (let
 >"secondary" : "secondary"
 
         ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
@@ -468,7 +468,7 @@ for (let [nameMA = "noName",
 >"secondary" : "secondary"
 
     ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
@@ -504,14 +504,14 @@ for (let [nameMA = "noName",
 >"secondary" : "secondary"
 
     ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
 ]  = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i : number
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
index 0795142c6778d..1f82f8fa11c70 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForArrayBindingPatternDefaultValues2.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -30,18 +30,18 @@ function getRobot() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -128,13 +128,13 @@ for ([, nameA = "name"] = getRobot(), i = 0; i < 1; i++) {
 }
 for ([, nameA = "name"] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[, nameA = "name"] = [2, "trimmer", "trimming"], i = 0 : 0
->[, nameA = "name"] = [2, "trimmer", "trimming"] : [number, string, string]
+>[, nameA = "name"] = [2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >[, nameA = "name"] : [undefined, string]
 > : undefined
 >nameA = "name" : "name"
 >nameA : string
 >"name" : "name"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -157,9 +157,9 @@ for ([, nameA = "name"] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 for ([, [
 >[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = multiRobotA, i = 0 : 0
 >[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = multiRobotA : [string, [string, string]]
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, ["none", "none"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : ["none", "none"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -173,7 +173,7 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = multiRobotA, i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 >multiRobotA : [string, [string, string]]
@@ -196,9 +196,9 @@ for ([, [
 for ([, [
 >[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = getMultiRobot(), i = 0 : 0
 >[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = getMultiRobot() : [string, [string, string]]
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, ["none", "none"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : ["none", "none"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -212,7 +212,7 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = getMultiRobot(), i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 >getMultiRobot() : [string, [string, string]]
@@ -235,10 +235,10 @@ for ([, [
 }
 for ([, [
 >[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]] : [string, ["trimming", "edging"]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"]] : [undefined, ["none", "none"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["none", "none"] : ["none", "none"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -252,12 +252,12 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : [string, ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -330,13 +330,13 @@ for ([numberB = -1] = getRobot(), i = 0; i < 1; i++) {
 }
 for ([numberB = -1] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberB = -1] = [2, "trimmer", "trimming"], i = 0 : 0
->[numberB = -1] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB = -1] = [2, "trimmer", "trimming"] : [2, string, string]
 >[numberB = -1] : [number]
 >numberB = -1 : -1
 >numberB : number
 >-1 : -1
 >1 : 1
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -407,14 +407,14 @@ for ([nameB = "name"] = getMultiRobot(), i = 0; i < 1; i++) {
 }
 for ([nameB = "name"] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
 >[nameB = "name"] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[nameB = "name"] = ["trimmer", ["trimming", "edging"]] : [string, string[]]
+>[nameB = "name"] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >[nameB = "name"] : [string]
 >nameB = "name" : "name"
 >nameB : string
 >"name" : "name"
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -499,7 +499,7 @@ for ([numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = getRobot(), i = 0; i
 }
 for ([numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "trimming"], i = 0; i < 1; i++) {
 >[numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "trimming"], i = 0 : 0
->[numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >[numberA2 = -1, nameA2 = "name", skillA2 = "skill"] : [number, string, string]
 >numberA2 = -1 : -1
 >numberA2 : number
@@ -511,7 +511,7 @@ for ([numberA2 = -1, nameA2 = "name", skillA2 = "skill"] = [2, "trimmer", "trimm
 >skillA2 = "skill" : "skill"
 >skillA2 : string
 >"skill" : "skill"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -546,7 +546,7 @@ for (let
 >"secondary" : "secondary"
 
         ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
@@ -570,13 +570,13 @@ for (let
 for ([nameMA = "noName",
 >[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] = getMultiRobot(), i = 0 : 0
 >[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] = getMultiRobot() : [string, [string, string]]
->[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] : [string, [string, string]]
+>[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] : [string, ["none", "none"]]
 >nameMA = "noName" : "noName"
 >nameMA : string
 >"noName" : "noName"
 
     [
->[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"] : [string, string]
+>[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"] : ["none", "none"]
 >[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] : [string, string]
 
         primarySkillA = "primary",
@@ -590,7 +590,7 @@ for ([nameMA = "noName",
 >"secondary" : "secondary"
 
     ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
@@ -615,14 +615,14 @@ for ([nameMA = "noName",
 }
 for ([nameMA = "noName",
 >[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]], i = 0 : 0
->[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
->[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] : [string, [string, string]]
+>[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
+>[nameMA = "noName",    [        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"]] : [string, ["none", "none"]]
 >nameMA = "noName" : "noName"
 >nameMA : string
 >"noName" : "noName"
 
     [
->[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"] : [string, string]
+>[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] = ["none", "none"] : ["none", "none"]
 >[        primarySkillA = "primary",        secondarySkillA = "secondary"    ] : [string, string]
 
         primarySkillA = "primary",
@@ -636,14 +636,14 @@ for ([nameMA = "noName",
 >"secondary" : "secondary"
 
     ] = ["none", "none"]
->["none", "none"] : [string, string]
+>["none", "none"] : ["none", "none"]
 >"none" : "none"
 >"none" : "none"
 
 ] = ["trimmer", ["trimming", "edging"]], i = 0; i < 1; i++) {
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 >i = 0 : 0
@@ -730,7 +730,7 @@ for ([numberA3 = -1, ...robotAInfo] = <Robot>[2, "trimmer", "trimming"], i = 0;
 >robotAInfo : (string | number)[]
 ><Robot>[2, "trimmer", "trimming"] : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern.types
index 3a78d92033bf1..3525983910bea 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern.types
@@ -37,7 +37,7 @@ interface MultiRobot {
 let robot: Robot = { name: "mower", skill: "mowing" };
 >robot : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -46,11 +46,11 @@ let robot: Robot = { name: "mower", skill: "mowing" };
 let multiRobot: MultiRobot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >multiRobot : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -113,7 +113,7 @@ for (let {name: nameA } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0;
 >nameA : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -188,11 +188,11 @@ for (let { skills: { primary: primaryA, secondary: secondaryA } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -265,7 +265,7 @@ for (let {name: nameA, skill: skillA } = <Robot>{ name: "trimmer", skill: "trimm
 >skillA : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -346,11 +346,11 @@ for (let {name: nameA, skills: { primary: primaryA, secondary: secondaryA } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern2.types
index 49ae5c619440b..0e1cb9515d189 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPattern2.types
@@ -37,7 +37,7 @@ interface MultiRobot {
 let robot: Robot = { name: "mower", skill: "mowing" };
 >robot : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -46,11 +46,11 @@ let robot: Robot = { name: "mower", skill: "mowing" };
 let multiRobot: MultiRobot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >multiRobot : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -137,7 +137,7 @@ for ({ name: nameA } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0; i <
 >nameA : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -227,11 +227,11 @@ for ({ skills: { primary: primaryA, secondary: secondaryA } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -306,7 +306,7 @@ for ({ name } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0; i < 1; i++
 >name : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -390,11 +390,11 @@ for ({ skills: { primary, secondary } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -480,7 +480,7 @@ for ({ name: nameA, skill: skillA } = <Robot>{ name: "trimmer", skill: "trimming
 >skillA : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -576,11 +576,11 @@ for ({ name: nameA, skills: { primary: primaryA, secondary: secondaryA } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -658,7 +658,7 @@ for ({ name, skill } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0; i <
 >skill : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -745,11 +745,11 @@ for ({ name, skills: { primary, secondary } } =
     <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues.types
index 261ccd3639675..86fb67efe625a 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues.types
@@ -37,7 +37,7 @@ interface MultiRobot {
 let robot: Robot = { name: "mower", skill: "mowing" };
 >robot : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -46,11 +46,11 @@ let robot: Robot = { name: "mower", skill: "mowing" };
 let multiRobot: MultiRobot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >multiRobot : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -116,7 +116,7 @@ for (let {name: nameA = "noName" } = <Robot>{ name: "trimmer", skill: "trimming"
 >"noName" : "noName"
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -151,7 +151,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -189,7 +189,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -228,7 +228,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -237,11 +237,11 @@ for (let {
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -320,7 +320,7 @@ for (let {name: nameA = "noName", skill: skillA = "skill" } = <Robot>{ name: "tr
 >"skill" : "skill"
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -360,7 +360,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -403,7 +403,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -447,7 +447,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -456,11 +456,11 @@ for (let {
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues2.types
index c5f2c806def80..7b535bbe7775c 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForObjectBindingPatternDefaultValues2.types
@@ -37,7 +37,7 @@ interface MultiRobot {
 let robot: Robot = { name: "mower", skill: "mowing" };
 >robot : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -46,11 +46,11 @@ let robot: Robot = { name: "mower", skill: "mowing" };
 let multiRobot: MultiRobot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >multiRobot : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -143,7 +143,7 @@ for ({name: nameA = "noName" } = <Robot>{ name: "trimmer", skill: "trimming" },
 >"noName" : "noName"
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -167,11 +167,11 @@ for ({name: nameA = "noName" } = <Robot>{ name: "trimmer", skill: "trimming" },
 for ({
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot, i = 0 : 0
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot : MultiRobot
->{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -187,7 +187,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -214,11 +214,11 @@ for ({
 for ({
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot(), i = 0 : 0
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot() : MultiRobot
->{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -234,7 +234,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -262,11 +262,11 @@ for ({
 for ({
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },    i = 0 : 0
 >{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
->{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -282,7 +282,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -291,11 +291,11 @@ for ({
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -371,7 +371,7 @@ for ({ name = "noName" } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0;
 >name : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -395,11 +395,11 @@ for ({ name = "noName" } = <Robot>{ name: "trimmer", skill: "trimming" }, i = 0;
 for ({
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot, i = 0 : 0
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot : MultiRobot
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -409,7 +409,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -436,11 +436,11 @@ for ({
 for ({
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot(), i = 0 : 0
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot() : MultiRobot
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -450,7 +450,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -478,11 +478,11 @@ for ({
 for ({
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },    i = 0 : 0
 >{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { skills?: { primary?: "none"; secondary?: "none"; }; }
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -492,7 +492,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -501,11 +501,11 @@ for ({
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -603,7 +603,7 @@ for ({name: nameA = "noName", skill: skillA = "skill" } = <Robot>{ name: "trimme
 >"skill" : "skill"
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -627,7 +627,7 @@ for ({name: nameA = "noName", skill: skillA = "skill" } = <Robot>{ name: "trimme
 for ({
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot, i = 0 : 0
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot : MultiRobot
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name: nameA = "noName",
 >name : string
@@ -636,8 +636,8 @@ for ({
 >"noName" : "noName"
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -653,7 +653,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -680,7 +680,7 @@ for ({
 for ({
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot(), i = 0 : 0
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot() : MultiRobot
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name: nameA = "noName",
 >name : string
@@ -689,8 +689,8 @@ for ({
 >"noName" : "noName"
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -706,7 +706,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -734,7 +734,7 @@ for ({
 for ({
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },    i = 0 : 0
 >{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name: nameA = "noName",
 >name : string
@@ -743,8 +743,8 @@ for ({
 >"noName" : "noName"
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -760,7 +760,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -769,11 +769,11 @@ for ({
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -852,7 +852,7 @@ for ({ name = "noName", skill = "skill" } = <Robot>{ name: "trimmer", skill: "tr
 >skill : string
 ><Robot>{ name: "trimmer", skill: "trimming" } : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -876,14 +876,14 @@ for ({ name = "noName", skill = "skill" } = <Robot>{ name: "trimmer", skill: "tr
 for ({
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot, i = 0 : 0
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = multiRobot : MultiRobot
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name = "noName",
 >name : string
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -893,7 +893,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -920,14 +920,14 @@ for ({
 for ({
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot(), i = 0 : 0
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = getMultiRobot() : MultiRobot
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name = "noName",
 >name : string
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -937,7 +937,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -965,14 +965,14 @@ for ({
 for ({
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },    i = 0 : 0
 >{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" }} : { name?: string; skills?: { primary?: "none"; secondary?: "none"; }; }
 
     name = "noName",
 >name : string
 
     skills: {
->skills : { primary?: string; secondary?: string; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>skills : { primary?: "none"; secondary?: "none"; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -982,7 +982,7 @@ for ({
 >secondary : string
 
     } = { primary: "none", secondary: "none" }
->{ primary: "none", secondary: "none" } : { primary?: string; secondary?: string; }
+>{ primary: "none", secondary: "none" } : { primary?: "none"; secondary?: "none"; }
 >primary : string
 >"none" : "none"
 >secondary : string
@@ -991,11 +991,11 @@ for ({
 } = <MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } },
 ><MultiRobot>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : MultiRobot
 >MultiRobot : MultiRobot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
index 41dc32d2648c6..fc69266957e01 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ let robotA: Robot = [1, "mower", "mowing"];
 let robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -44,18 +44,18 @@ function getRobots() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
index abc08ee63d425..6862976fbf4ca 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPattern2.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ let robotA: Robot = [1, "mower", "mowing"];
 let robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -44,18 +44,18 @@ function getRobots() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
index e82c981033e7d..ed7f3fa0aca5d 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ let robotA: Robot = [1, "mower", "mowing"];
 let robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -44,18 +44,18 @@ function getRobots() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -126,7 +126,7 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of multiRobots) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >multiRobots : [string, [string, string]][]
@@ -150,7 +150,7 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of getMultiRobots()) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >getMultiRobots() : [string, [string, string]][]
@@ -175,7 +175,7 @@ for (let [, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of [multiRobotA, multiRobotB]) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >[multiRobotA, multiRobotB] : [string, [string, string]][]
@@ -339,7 +339,7 @@ for (let [nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of multiRobots) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >multiRobots : [string, [string, string]][]
@@ -364,7 +364,7 @@ for (let [nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of getMultiRobots()) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >getMultiRobots() : [string, [string, string]][]
@@ -390,7 +390,7 @@ for (let [nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of [multiRobotA, multiRobotB]) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >[multiRobotA, multiRobotB] : [string, [string, string]][]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
index dad997dac4fe5..df4ee69281df7 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfArrayBindingPatternDefaultValues2.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 let robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ let robotA: Robot = [1, "mower", "mowing"];
 let robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -44,18 +44,18 @@ function getRobots() {
 let multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 let multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -141,9 +141,9 @@ for ([, nameA = "noName"] of [robotA, robotB]) {
 >nameA : string
 }
 for ([, [
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, ["skill1", "skill2"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -157,7 +157,7 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of multiRobots) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >multiRobots : [string, [string, string]][]
@@ -170,9 +170,9 @@ for ([, [
 >primarySkillA : string
 }
 for ([, [
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, ["skill1", "skill2"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -186,7 +186,7 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of getMultiRobots()) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >getMultiRobots() : [string, [string, string]][]
@@ -200,9 +200,9 @@ for ([, [
 >primarySkillA : string
 }
 for ([, [
->[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, [string, string]]
+>[, [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [undefined, ["skill1", "skill2"]]
 > : undefined
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -216,7 +216,7 @@ for ([, [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of [multiRobotA, multiRobotB]) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >[multiRobotA, multiRobotB] : [string, [string, string]][]
@@ -392,11 +392,11 @@ for ([numberA2 = -1, nameA2 = "noName", skillA2 = "skill"] of [robotA, robotB])
 >nameA2 : string
 }
 for ([nameMA = "noName", [
->[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, [string, string]]
+>[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, ["skill1", "skill2"]]
 >nameMA = "noName" : "noName"
 >nameMA : string
 >"noName" : "noName"
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -410,7 +410,7 @@ for ([nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of multiRobots) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >multiRobots : [string, [string, string]][]
@@ -423,11 +423,11 @@ for ([nameMA = "noName", [
 >nameMA : string
 }
 for ([nameMA = "noName", [
->[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, [string, string]]
+>[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, ["skill1", "skill2"]]
 >nameMA = "noName" : "noName"
 >nameMA : string
 >"noName" : "noName"
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -441,7 +441,7 @@ for ([nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of getMultiRobots()) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >getMultiRobots() : [string, [string, string]][]
@@ -455,11 +455,11 @@ for ([nameMA = "noName", [
 >nameMA : string
 }
 for ([nameMA = "noName", [
->[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, [string, string]]
+>[nameMA = "noName", [    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"]] : [string, ["skill1", "skill2"]]
 >nameMA = "noName" : "noName"
 >nameMA : string
 >"noName" : "noName"
->[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : [string, string]
+>[    primarySkillA = "primary",    secondarySkillA = "secondary"] = ["skill1", "skill2"] : ["skill1", "skill2"]
 >[    primarySkillA = "primary",    secondarySkillA = "secondary"] : [string, string]
 
     primarySkillA = "primary",
@@ -473,7 +473,7 @@ for ([nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["skill1", "skill2"]] of [multiRobotA, multiRobotB]) {
->["skill1", "skill2"] : [string, string]
+>["skill1", "skill2"] : ["skill1", "skill2"]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 >[multiRobotA, multiRobotB] : [string, [string, string]][]
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern.types
index 26d570974df92..d69597ce8a95c 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern.types
@@ -37,13 +37,13 @@ interface MultiRobot {
 let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }];
 >robots : Robot[]
 >Robot : Robot
->[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : { name: string; skill: string; }[]
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : ({ name: "mower"; skill: "mowing"; } | { name: "trimmer"; skill: "trimming"; })[]
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
 >"mowing" : "mowing"
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -52,23 +52,23 @@ let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", sk
 let multiRobots: MultiRobot[] = [{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 >multiRobots : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }];
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern2.types
index 64680d66001d9..59c4044edcc00 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPattern2.types
@@ -37,13 +37,13 @@ interface MultiRobot {
 let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }];
 >robots : Robot[]
 >Robot : Robot
->[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : { name: string; skill: string; }[]
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : ({ name: "mower"; skill: "mowing"; } | { name: "trimmer"; skill: "trimming"; })[]
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
 >"mowing" : "mowing"
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -52,23 +52,23 @@ let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", sk
 let multiRobots: MultiRobot[] = [{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 >multiRobots : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }];
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues.types
index d55ab46cbd28b..1e2dc5eef7503 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues.types
@@ -37,13 +37,13 @@ interface MultiRobot {
 let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }];
 >robots : Robot[]
 >Robot : Robot
->[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : { name: string; skill: string; }[]
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : ({ name: "mower"; skill: "mowing"; } | { name: "trimmer"; skill: "trimming"; })[]
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
 >"mowing" : "mowing"
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -52,23 +52,23 @@ let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", sk
 let multiRobots: MultiRobot[] = [{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 >multiRobots : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }];
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -148,7 +148,7 @@ for (let { skills: { primary: primaryA = "primary", secondary: secondaryA = "sec
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of multiRobots) {
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -172,7 +172,7 @@ for (let { skills: { primary: primaryA = "primary", secondary: secondaryA = "sec
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of getMultiRobots()) {
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -197,7 +197,7 @@ for (let { skills: { primary: primaryA = "primary", secondary: secondaryA = "sec
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -206,23 +206,23 @@ for (let { skills: { primary: primaryA = "primary", secondary: secondaryA = "sec
     <MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 ><MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }]) {
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -315,7 +315,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -351,7 +351,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -388,7 +388,7 @@ for (let {
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -397,23 +397,23 @@ for (let {
 } of <MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 ><MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }]) {
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues2.types
index 6119665124d2d..56d0f5b6735c1 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringForOfObjectBindingPatternDefaultValues2.types
@@ -37,13 +37,13 @@ interface MultiRobot {
 let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }];
 >robots : Robot[]
 >Robot : Robot
->[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : { name: string; skill: string; }[]
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>[{ name: "mower", skill: "mowing" }, { name: "trimmer", skill: "trimming" }] : ({ name: "mower"; skill: "mowing"; } | { name: "trimmer"; skill: "trimming"; })[]
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
 >"mowing" : "mowing"
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -52,23 +52,23 @@ let robots: Robot[] = [{ name: "mower", skill: "mowing" }, { name: "trimmer", sk
 let multiRobots: MultiRobot[] = [{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 >multiRobots : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }];
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -158,9 +158,9 @@ for ({name: nameA = "noName" } of [{ name: "mower", skill: "mowing" }, { name: "
 >nameA : string
 }
 for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =
->{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: string; secondary?: string; }; }
+>{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: "nosKill"; secondary?: "noSkill"; }; }
 >skills : MultiRobot
->{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } : { primary?: string; secondary?: string; }
 >primary : string
 >primaryA = "primary" : "primary"
@@ -172,7 +172,7 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of multiRobots) {
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -187,9 +187,9 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
 >primaryA : string
 }
 for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =
->{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: string; secondary?: string; }; }
+>{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: "nosKill"; secondary?: "noSkill"; }; }
 >skills : MultiRobot
->{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } : { primary?: string; secondary?: string; }
 >primary : string
 >primaryA = "primary" : "primary"
@@ -201,7 +201,7 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of getMultiRobots()) {
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -217,9 +217,9 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
 >primaryA : string
 }
 for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =
->{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: string; secondary?: string; }; }
+>{ skills: { primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } } : { skills?: { primary?: "nosKill"; secondary?: "noSkill"; }; }
 >skills : MultiRobot
->{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } =    { primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >{ primary: primaryA = "primary", secondary: secondaryA = "secondary" } : { primary?: string; secondary?: string; }
 >primary : string
 >primaryA = "primary" : "primary"
@@ -231,7 +231,7 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
 >"secondary" : "secondary"
 
     { primary: "nosKill", secondary: "noSkill" } } of
->{ primary: "nosKill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "nosKill", secondary: "noSkill" } : { primary?: "nosKill"; secondary?: "noSkill"; }
 >primary : string
 >"nosKill" : "nosKill"
 >secondary : string
@@ -240,23 +240,23 @@ for ({ skills: { primary: primaryA = "primary", secondary: secondaryA = "seconda
     <MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 ><MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },        { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },        { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },        { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
         { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }]) {
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -318,11 +318,11 @@ for ({ name = "noName" } of [{ name: "mower", skill: "mowing" }, { name: "trimme
 >nameA : string
 }
 for ({
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     skills: {
 >skills : MultiRobot
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -332,7 +332,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -349,11 +349,11 @@ for ({
 >primaryA : string
 }
 for ({
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     skills: {
 >skills : MultiRobot
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -363,7 +363,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -381,11 +381,11 @@ for ({
 >primaryA : string
 }
 for ({
->{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: string; secondary?: string; }; }
+>{    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     skills: {
 >skills : { name: string; skills: { primary: string; secondary: string; }; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -395,7 +395,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -502,7 +502,7 @@ for ({name: nameA = "noName", skill: skillA = "noSkill"  } of [{ name: "mower",
 >nameA : string
 }
 for ({
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name: nameA = "noName",
 >name : MultiRobot
@@ -512,7 +512,7 @@ for ({
 
     skills: {
 >skills : MultiRobot
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -528,7 +528,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -545,7 +545,7 @@ for ({
 >nameA : string
 }
 for ({
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name: nameA = "noName",
 >name : MultiRobot
@@ -555,7 +555,7 @@ for ({
 
     skills: {
 >skills : MultiRobot
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -571,7 +571,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -589,7 +589,7 @@ for ({
 >nameA : string
 }
 for ({
->{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name: nameA = "noName",    skills: {        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name: nameA = "noName",
 >name : MultiRobot
@@ -599,7 +599,7 @@ for ({
 
     skills: {
 >skills : MultiRobot
->{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary: primaryA = "primary",        secondary: secondaryA = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary: primaryA = "primary",
@@ -615,7 +615,7 @@ for ({
 >"secondary" : "secondary"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -624,23 +624,23 @@ for ({
 } of <MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },
 ><MultiRobot[]>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : MultiRobot[]
 >MultiRobot : MultiRobot
->[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : { name: string; skills: { primary: string; secondary: string; }; }[]
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>[{ name: "mower", skills: { primary: "mowing", secondary: "none" } },    { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }] : ({ name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; } | { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; })[]
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
 >"none" : "none"
 
     { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } }]) {
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -705,14 +705,14 @@ for ({ name = "noName", skill  = "noSkill" } of [{ name: "mower", skill: "mowing
 >nameA : string
 }
 for ({
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name = "noName",
 >name : MultiRobot
 
     skills: {
 >skills : MultiRobot
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -722,7 +722,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -739,14 +739,14 @@ for ({
 >nameA : string
 }
 for ({
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name = "noName",
 >name : MultiRobot
 
     skills: {
 >skills : MultiRobot
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -756,7 +756,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -774,14 +774,14 @@ for ({
 >nameA : string
 }
 for ({
->{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: string; secondary?: string; }; }
+>{    name = "noName",    skills: {        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" }} : { name?: string; skills?: { primary?: "noSkill"; secondary?: "noSkill"; }; }
 
     name = "noName",
 >name : { name: string; skills: { primary: string; secondary: string; }; }
 
     skills: {
 >skills : { name: string; skills: { primary: string; secondary: string; }; }
->{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{        primary = "primary",        secondary = "secondary"    } = { primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >{        primary = "primary",        secondary = "secondary"    } : { primary?: string; secondary?: string; }
 
         primary = "primary",
@@ -791,7 +791,7 @@ for ({
 >secondary : string
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPattern.types
index bbd13dddf5741..6761acaf31809 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPattern.types
@@ -26,11 +26,11 @@ interface Robot {
 var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -93,11 +93,11 @@ foo1(robotA);
 foo1({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo1({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo1 : ({ skills: { primary: primaryA, secondary: secondaryA } }: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
@@ -111,11 +111,11 @@ foo2(robotA);
 foo2({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo2({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo2 : ({ name: nameC, skills: { primary: primaryB, secondary: secondaryB } }: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
@@ -129,11 +129,11 @@ foo3(robotA);
 foo3({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo3({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo3 : ({ skills }: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPatternDefaultValues.types
index d9c8b3197523e..913b71a98f000 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParameterNestedObjectBindingPatternDefaultValues.types
@@ -26,11 +26,11 @@ interface Robot {
 var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -53,7 +53,7 @@ function foo1(
 >"secondary" : "secondary"
 
         } = { primary: "SomeSkill", secondary: "someSkill" }
->{ primary: "SomeSkill", secondary: "someSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "SomeSkill", secondary: "someSkill" } : { primary?: "SomeSkill"; secondary?: "someSkill"; }
 >primary : string
 >"SomeSkill" : "SomeSkill"
 >secondary : string
@@ -92,7 +92,7 @@ function foo2(
 >"secondary" : "secondary"
 
         } = { primary: "SomeSkill", secondary: "someSkill" }
->{ primary: "SomeSkill", secondary: "someSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "SomeSkill", secondary: "someSkill" } : { primary?: "SomeSkill"; secondary?: "someSkill"; }
 >primary : string
 >"SomeSkill" : "SomeSkill"
 >secondary : string
@@ -112,7 +112,7 @@ function foo2(
 function foo3({ skills = { primary: "SomeSkill", secondary: "someSkill" }  }: Robot = robotA) {
 >foo3 : ({ skills }?: Robot) => void
 >skills : { primary?: string; secondary?: string; }
->{ primary: "SomeSkill", secondary: "someSkill" } : { primary: string; secondary: string; }
+>{ primary: "SomeSkill", secondary: "someSkill" } : { primary: "SomeSkill"; secondary: "someSkill"; }
 >primary : string
 >"SomeSkill" : "SomeSkill"
 >secondary : string
@@ -138,11 +138,11 @@ foo1(robotA);
 foo1({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo1({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo1 : ({ skills: { primary: primaryA, secondary: secondaryA } }?: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
@@ -156,11 +156,11 @@ foo2(robotA);
 foo2({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo2({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo2 : ({ name: nameC, skills: { primary: primaryB, secondary: secondaryB } }?: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
@@ -174,11 +174,11 @@ foo3(robotA);
 foo3({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } });
 >foo3({ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } }) : void
 >foo3 : ({ skills }?: Robot) => void
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPattern.types
index 5185ab359945f..255fa6459f4a3 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPattern.types
@@ -22,7 +22,7 @@ var hello = "hello";
 var robotA: Robot = { name: "mower", skill: "mowing" };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -77,7 +77,7 @@ foo1(robotA);
 foo1({ name: "Edger", skill: "cutting edges" });
 >foo1({ name: "Edger", skill: "cutting edges" }) : void
 >foo1 : ({ name: nameA }: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
@@ -91,7 +91,7 @@ foo2(robotA);
 foo2({ name: "Edger", skill: "cutting edges" });
 >foo2({ name: "Edger", skill: "cutting edges" }) : void
 >foo2 : ({ name: nameB, skill: skillB }: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
@@ -105,7 +105,7 @@ foo3(robotA);
 foo3({ name: "Edger", skill: "cutting edges" });
 >foo3({ name: "Edger", skill: "cutting edges" }) : void
 >foo3 : ({ name }: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPatternDefaultValues.types
index ca6670e556115..f325799abec61 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParameterObjectBindingPatternDefaultValues.types
@@ -22,7 +22,7 @@ var hello = "hello";
 var robotA: Robot = { name: "mower", skill: "mowing" };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -84,7 +84,7 @@ foo1(robotA);
 foo1({ name: "Edger", skill: "cutting edges" });
 >foo1({ name: "Edger", skill: "cutting edges" }) : void
 >foo1 : ({ name: nameA }?: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
@@ -98,7 +98,7 @@ foo2(robotA);
 foo2({ name: "Edger", skill: "cutting edges" });
 >foo2({ name: "Edger", skill: "cutting edges" }) : void
 >foo2 : ({ name: nameB, skill: skillB }?: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
@@ -112,7 +112,7 @@ foo3(robotA);
 foo3({ name: "Edger", skill: "cutting edges" });
 >foo3({ name: "Edger", skill: "cutting edges" }) : void
 >foo3 : ({ name }?: Robot) => void
->{ name: "Edger", skill: "cutting edges" } : { name: string; skill: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name: "Edger"; skill: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
index d7aed64a23282..df75701289c00 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern.types
@@ -12,7 +12,7 @@ type Robot = [number, string, string];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -81,7 +81,7 @@ foo1(robotA);
 foo1([2, "trimmer", "trimming"]);
 >foo1([2, "trimmer", "trimming"]) : void
 >foo1 : ([, nameA]: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -94,7 +94,7 @@ foo2(robotA);
 foo2([2, "trimmer", "trimming"]);
 >foo2([2, "trimmer", "trimming"]) : void
 >foo2 : ([numberB]: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -107,7 +107,7 @@ foo3(robotA);
 foo3([2, "trimmer", "trimming"]);
 >foo3([2, "trimmer", "trimming"]) : void
 >foo3 : ([numberA2, nameA2, skillA2]: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -120,7 +120,7 @@ foo4(robotA);
 foo4([2, "trimmer", "trimming"]);
 >foo4([2, "trimmer", "trimming"]) : void
 >foo4 : ([numberA3, ...robotAInfo]: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern2.types
index 00809184d3b30..60038aaf6e806 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPattern2.types
@@ -12,9 +12,9 @@ type Robot = [string, [string, string]];
 var robotA: Robot = ["trimmer", ["trimming", "edging"]];
 >robotA : [string, [string, string]]
 >Robot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -81,9 +81,9 @@ foo1(robotA);
 foo1(["roomba", ["vaccum", "mopping"]]);
 >foo1(["roomba", ["vaccum", "mopping"]]) : void
 >foo1 : ([, skillA]: [string, [string, string]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -95,9 +95,9 @@ foo2(robotA);
 foo2(["roomba", ["vaccum", "mopping"]]);
 >foo2(["roomba", ["vaccum", "mopping"]]) : void
 >foo2 : ([nameMB]: [string, [string, string]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -109,9 +109,9 @@ foo3(robotA);
 foo3(["roomba", ["vaccum", "mopping"]]);
 >foo3(["roomba", ["vaccum", "mopping"]]) : void
 >foo3 : ([nameMA, [primarySkillA, secondarySkillA]]: [string, [string, string]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -123,9 +123,9 @@ foo4(robotA);
 foo4(["roomba", ["vaccum", "mopping"]]);
 >foo4(["roomba", ["vaccum", "mopping"]]) : void
 >foo4 : ([...multiRobotAInfo]: [string, [string, string]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
index a9d1013c136cf..4832012ad1551 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues.types
@@ -12,7 +12,7 @@ type Robot = [number, string, string];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ function foo1([, nameA = "noName"]: Robot = [-1, "name", "skill"]) {
 >nameA : string
 >"noName" : "noName"
 >Robot : [number, string, string]
->[-1, "name", "skill"] : [number, string, string]
+>[-1, "name", "skill"] : [-1, "name", "skill"]
 >-1 : -1
 >1 : 1
 >"name" : "name"
@@ -43,7 +43,7 @@ function foo2([numberB = -1]: Robot = [-1, "name", "skill"]) {
 >-1 : -1
 >1 : 1
 >Robot : [number, string, string]
->[-1, "name", "skill"] : [number, string, string]
+>[-1, "name", "skill"] : [-1, "name", "skill"]
 >-1 : -1
 >1 : 1
 >"name" : "name"
@@ -67,7 +67,7 @@ function foo3([numberA2 = -1, nameA2 = "name", skillA2 = "skill"]: Robot = [-1,
 >skillA2 : string
 >"skill" : "skill"
 >Robot : [number, string, string]
->[-1, "name", "skill"] : [number, string, string]
+>[-1, "name", "skill"] : [-1, "name", "skill"]
 >-1 : -1
 >1 : 1
 >"name" : "name"
@@ -88,7 +88,7 @@ function foo4([numberA3 = -1, ...robotAInfo]: Robot = [-1, "name", "skill"]) {
 >1 : 1
 >robotAInfo : (string | number)[]
 >Robot : [number, string, string]
->[-1, "name", "skill"] : [number, string, string]
+>[-1, "name", "skill"] : [-1, "name", "skill"]
 >-1 : -1
 >1 : 1
 >"name" : "name"
@@ -110,7 +110,7 @@ foo1(robotA);
 foo1([2, "trimmer", "trimming"]);
 >foo1([2, "trimmer", "trimming"]) : void
 >foo1 : ([, nameA]?: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -123,7 +123,7 @@ foo2(robotA);
 foo2([2, "trimmer", "trimming"]);
 >foo2([2, "trimmer", "trimming"]) : void
 >foo2 : ([numberB]?: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -136,7 +136,7 @@ foo3(robotA);
 foo3([2, "trimmer", "trimming"]);
 >foo3([2, "trimmer", "trimming"]) : void
 >foo3 : ([numberA2, nameA2, skillA2]?: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -149,7 +149,7 @@ foo4(robotA);
 foo4([2, "trimmer", "trimming"]);
 >foo4([2, "trimmer", "trimming"]) : void
 >foo4 : ([numberA3, ...robotAInfo]?: [number, string, string]) => void
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues2.types
index b3569bb58b7d1..7857fd2762c85 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringParametertArrayBindingPatternDefaultValues2.types
@@ -12,9 +12,9 @@ type Robot = [string, string[]];
 var robotA: Robot = ["trimmer", ["trimming", "edging"]];
 >robotA : [string, string[]]
 >Robot : [string, string[]]
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -26,9 +26,9 @@ function foo1([, skillA = ["noSkill", "noSkill"]]: Robot= ["name", ["skill1", "s
 >"noSkill" : "noSkill"
 >"noSkill" : "noSkill"
 >Robot : [string, string[]]
->["name", ["skill1", "skill2"]] : [string, string[]]
+>["name", ["skill1", "skill2"]] : ["name", ("skill1" | "skill2")[]]
 >"name" : "name"
->["skill1", "skill2"] : string[]
+>["skill1", "skill2"] : ("skill1" | "skill2")[]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 
@@ -45,9 +45,9 @@ function foo2([nameMB = "noName"]: Robot = ["name", ["skill1", "skill2"]]) {
 >nameMB : string
 >"noName" : "noName"
 >Robot : [string, string[]]
->["name", ["skill1", "skill2"]] : [string, string[]]
+>["name", ["skill1", "skill2"]] : ["name", ("skill1" | "skill2")[]]
 >"name" : "name"
->["skill1", "skill2"] : string[]
+>["skill1", "skill2"] : ("skill1" | "skill2")[]
 >"skill1" : "skill1"
 >"skill2" : "skill2"
 
@@ -73,7 +73,7 @@ function foo3([nameMA = "noName", [
 >"secondary" : "secondary"
 
 ] = ["noSkill", "noSkill"]]: Robot) {
->["noSkill", "noSkill"] : [string, string]
+>["noSkill", "noSkill"] : ["noSkill", "noSkill"]
 >"noSkill" : "noSkill"
 >"noSkill" : "noSkill"
 >Robot : [string, string[]]
@@ -94,9 +94,9 @@ foo1(robotA);
 foo1(["roomba", ["vaccum", "mopping"]]);
 >foo1(["roomba", ["vaccum", "mopping"]]) : void
 >foo1 : ([, skillA]?: [string, string[]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, string[]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ("vaccum" | "mopping")[]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : string[]
+>["vaccum", "mopping"] : ("vaccum" | "mopping")[]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -108,9 +108,9 @@ foo2(robotA);
 foo2(["roomba", ["vaccum", "mopping"]]);
 >foo2(["roomba", ["vaccum", "mopping"]]) : void
 >foo2 : ([nameMB]?: [string, string[]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, string[]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ("vaccum" | "mopping")[]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : string[]
+>["vaccum", "mopping"] : ("vaccum" | "mopping")[]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -122,9 +122,9 @@ foo3(robotA);
 foo3(["roomba", ["vaccum", "mopping"]]);
 >foo3(["roomba", ["vaccum", "mopping"]]) : void
 >foo3 : ([nameMA, [primarySkillA, secondarySkillA]]: [string, string[]]) => void
->["roomba", ["vaccum", "mopping"]] : [string, string[]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ("vaccum" | "mopping")[]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : string[]
+>["vaccum", "mopping"] : ("vaccum" | "mopping")[]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement.types
index 5d61294b5684b..bde7b8b24b9b6 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement.types
@@ -22,7 +22,7 @@ var hello = "hello";
 var robotA: Robot = { name: "mower", skill: "mowing" };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -31,7 +31,7 @@ var robotA: Robot = { name: "mower", skill: "mowing" };
 var robotB: Robot = { name: "trimmer", skill: "trimming" };
 >robotB : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement1.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement1.types
index 9ed1df0f533ba..730f8f1a7078a 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement1.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatement1.types
@@ -22,7 +22,7 @@ var hello = "hello";
 var robotA: Robot = { name: "mower", skill: "mowing" };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -31,7 +31,7 @@ var robotA: Robot = { name: "mower", skill: "mowing" };
 var robotB: Robot = { name: "trimmer", skill: "trimming" };
 >robotB : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
index 46bdfec4b06b2..cb97d1be7f9f5 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern.types
@@ -12,7 +12,7 @@ type Robot = [number, string, string];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -20,7 +20,7 @@ var robotA: Robot = [1, "mower", "mowing"];
 var robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern2.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern2.types
index 99f280985b553..3e50bd95e6723 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern2.types
@@ -12,18 +12,18 @@ type MultiSkilledRobot = [string, [string, string]];
 var multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 var multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
index bdd2059b863e8..996d6735f4bed 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern3.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, [string, string]];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ var robotA: Robot = [1, "mower", "mowing"];
 var robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -31,18 +31,18 @@ var robotB: Robot = [2, "trimmer", "trimming"];
 var multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["mower", ["mowing", ""]] : [string, [string, string]]
+>["mower", ["mowing", ""]] : ["mower", ["mowing", ""]]
 >"mower" : "mower"
->["mowing", ""] : [string, string]
+>["mowing", ""] : ["mowing", ""]
 >"mowing" : "mowing"
 >"" : ""
 
 var multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, [string, string]]
 >MultiSkilledRobot : [string, [string, string]]
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -80,11 +80,11 @@ let multiRobotAInfo: (string | [string, string])[];
 >getRobotB : () => [number, string, string]
 
 [, nameB] = [2, "trimmer", "trimming"];
->[, nameB] = [2, "trimmer", "trimming"] : [number, string, string]
+>[, nameB] = [2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >[, nameB] : [undefined, string]
 > : undefined
 >nameB : string
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -105,13 +105,13 @@ let multiRobotAInfo: (string | [string, string])[];
 >getMultiRobotB : () => [string, [string, string]]
 
 [, multiSkillB] = ["roomba", ["vaccum", "mopping"]];
->[, multiSkillB] = ["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>[, multiSkillB] = ["roomba", ["vaccum", "mopping"]] : [string, ["vaccum", "mopping"]]
 >[, multiSkillB] : [undefined, [string, string]]
 > : undefined
 >multiSkillB : [string, string]
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : [string, ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -129,10 +129,10 @@ let multiRobotAInfo: (string | [string, string])[];
 >getRobotB : () => [number, string, string]
 
 [numberB] = [2, "trimmer", "trimming"];
->[numberB] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB] = [2, "trimmer", "trimming"] : [2, string, string]
 >[numberB] : [number]
 >numberB : number
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -151,12 +151,12 @@ let multiRobotAInfo: (string | [string, string])[];
 >getMultiRobotB : () => [string, [string, string]]
 
 [nameMB] = ["trimmer", ["trimming", "edging"]];
->[nameMB] = ["trimmer", ["trimming", "edging"]] : [string, string[]]
+>[nameMB] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >[nameMB] : [string]
 >nameMB : string
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -178,12 +178,12 @@ let multiRobotAInfo: (string | [string, string])[];
 >getRobotB : () => [number, string, string]
 
 [numberB, nameB, skillB] = [2, "trimmer", "trimming"];
->[numberB, nameB, skillB] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB, nameB, skillB] = [2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >[numberB, nameB, skillB] : [number, string, string]
 >numberB : number
 >nameB : string
 >skillB : string
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -208,15 +208,15 @@ let multiRobotAInfo: (string | [string, string])[];
 >getMultiRobotB : () => [string, [string, string]]
 
 [nameMB, [primarySkillB, secondarySkillB]] = ["trimmer", ["trimming", "edging"]];
->[nameMB, [primarySkillB, secondarySkillB]] = ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>[nameMB, [primarySkillB, secondarySkillB]] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >[nameMB, [primarySkillB, secondarySkillB]] : [string, [string, string]]
 >nameMB : string
 >[primarySkillB, secondarySkillB] : [string, string]
 >primarySkillB : string
 >secondarySkillB : string
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -245,7 +245,7 @@ let multiRobotAInfo: (string | [string, string])[];
 >robotAInfo : (string | number)[]
 ><Robot>[2, "trimmer", "trimming"] : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -266,13 +266,13 @@ let multiRobotAInfo: (string | [string, string])[];
 >getMultiRobotB : () => [string, [string, string]]
 
 [...multiRobotAInfo] = ["trimmer", ["trimming", "edging"]];
->[...multiRobotAInfo] = ["trimmer", ["trimming", "edging"]] : (string | [string, string])[]
+>[...multiRobotAInfo] = ["trimmer", ["trimming", "edging"]] : ("trimmer" | ["trimming", "edging"])[]
 >[...multiRobotAInfo] : (string | [string, string])[]
 >...multiRobotAInfo : string | [string, string]
 >multiRobotAInfo : (string | [string, string])[]
->["trimmer", ["trimming", "edging"]] : (string | [string, string])[]
+>["trimmer", ["trimming", "edging"]] : ("trimmer" | ["trimming", "edging"])[]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern6.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern6.types
index 61b32753bf705..4fa23442723fb 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern6.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern6.types
@@ -2,7 +2,7 @@
 var [x = 20] = [1, 2];
 >x : number
 >20 : 20
->[1, 2] : [number, number]
+>[1, 2] : [1, 2]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern7.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern7.types
index 6b6e6c2c7221f..71a027d25e7b2 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern7.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPattern7.types
@@ -3,7 +3,7 @@ var [x = 20, j] = [1, 2];
 >x : number
 >20 : 20
 >j : number
->[1, 2] : [number, number]
+>[1, 2] : [1, number]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
index fae55a6cabfef..a335f8e2f9739 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues.types
@@ -12,7 +12,7 @@ type Robot = [number, string, string];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -20,7 +20,7 @@ var robotA: Robot = [1, "mower", "mowing"];
 var robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -51,7 +51,7 @@ let [numberC2 = -1] = [3, "edging", "Trimming edges"];
 >numberC2 : number
 >-1 : -1
 >1 : 1
->[3, "edging", "Trimming edges"] : [number, string, string]
+>[3, "edging", "Trimming edges"] : [3, string, string]
 >3 : 3
 >"edging" : "edging"
 >"Trimming edges" : "Trimming edges"
@@ -64,7 +64,7 @@ let [numberC = -1, nameC = "noName", skillC = "noSkill"] = [3, "edging", "Trimmi
 >"noName" : "noName"
 >skillC : string
 >"noSkill" : "noSkill"
->[3, "edging", "Trimming edges"] : [number, string, string]
+>[3, "edging", "Trimming edges"] : [3, "edging", "Trimming edges"]
 >3 : 3
 >"edging" : "edging"
 >"Trimming edges" : "Trimming edges"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues2.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues2.types
index 21d75479c6dd8..318bea9052121 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues2.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues2.types
@@ -12,18 +12,18 @@ type MultiSkilledRobot = [string, string[]];
 var multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["mower", ["mowing", ""]] : [string, string[]]
+>["mower", ["mowing", ""]] : ["mower", ("mowing" | "")[]]
 >"mower" : "mower"
->["mowing", ""] : string[]
+>["mowing", ""] : ("mowing" | "")[]
 >"mowing" : "mowing"
 >"" : ""
 
 var multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -47,7 +47,7 @@ let [nameMA = "noName", [primarySkillA = "noSkill", secondarySkillA = "noSkill"]
 >"noSkill" : "noSkill"
 >secondarySkillA : string
 >"noSkill" : "noSkill"
->["noSkill", "noSkill"] : [string, string]
+>["noSkill", "noSkill"] : ["noSkill", "noSkill"]
 >"noSkill" : "noSkill"
 >"noSkill" : "noSkill"
 >multiRobotA : [string, string[]]
@@ -55,9 +55,9 @@ let [nameMA = "noName", [primarySkillA = "noSkill", secondarySkillA = "noSkill"]
 let [nameMC = "noName" ] = ["roomba", ["vaccum", "mopping"]];
 >nameMC : string
 >"noName" : "noName"
->["roomba", ["vaccum", "mopping"]] : [string, string[]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ("vaccum" | "mopping")[]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : string[]
+>["vaccum", "mopping"] : ("vaccum" | "mopping")[]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
@@ -68,12 +68,12 @@ let [nameMC2 = "noName", [primarySkillC = "noSkill", secondarySkillC = "noSkill"
 >"noSkill" : "noSkill"
 >secondarySkillC : string
 >"noSkill" : "noSkill"
->["noSkill", "noSkill"] : [string, string]
+>["noSkill", "noSkill"] : ["noSkill", "noSkill"]
 >"noSkill" : "noSkill"
 >"noSkill" : "noSkill"
->["roomba", ["vaccum", "mopping"]] : [string, [string, string]]
+>["roomba", ["vaccum", "mopping"]] : ["roomba", ["vaccum", "mopping"]]
 >"roomba" : "roomba"
->["vaccum", "mopping"] : [string, string]
+>["vaccum", "mopping"] : ["vaccum", "mopping"]
 >"vaccum" : "vaccum"
 >"mopping" : "mopping"
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
index 35c458f431066..fb59235b14221 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementArrayBindingPatternDefaultValues3.types
@@ -15,7 +15,7 @@ type MultiSkilledRobot = [string, string[]];
 var robotA: Robot = [1, "mower", "mowing"];
 >robotA : [number, string, string]
 >Robot : [number, string, string]
->[1, "mower", "mowing"] : [number, string, string]
+>[1, "mower", "mowing"] : [1, "mower", "mowing"]
 >1 : 1
 >"mower" : "mower"
 >"mowing" : "mowing"
@@ -23,7 +23,7 @@ var robotA: Robot = [1, "mower", "mowing"];
 var robotB: Robot = [2, "trimmer", "trimming"];
 >robotB : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -31,18 +31,18 @@ var robotB: Robot = [2, "trimmer", "trimming"];
 var multiRobotA: MultiSkilledRobot = ["mower", ["mowing", ""]];
 >multiRobotA : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["mower", ["mowing", ""]] : [string, string[]]
+>["mower", ["mowing", ""]] : ["mower", ("mowing" | "")[]]
 >"mower" : "mower"
->["mowing", ""] : string[]
+>["mowing", ""] : ("mowing" | "")[]
 >"mowing" : "mowing"
 >"" : ""
 
 var multiRobotB: MultiSkilledRobot = ["trimmer", ["trimming", "edging"]];
 >multiRobotB : [string, string[]]
 >MultiSkilledRobot : [string, string[]]
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -84,13 +84,13 @@ let multiRobotAInfo: (string | string[])[];
 >getRobotB : () => [number, string, string]
 
 [, nameB = "helloNoName"] = [2, "trimmer", "trimming"];
->[, nameB = "helloNoName"] = [2, "trimmer", "trimming"] : [number, string, string]
+>[, nameB = "helloNoName"] = [2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >[, nameB = "helloNoName"] : [undefined, string]
 > : undefined
 >nameB = "helloNoName" : "helloNoName"
 >nameB : string
 >"helloNoName" : "helloNoName"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [number, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -147,13 +147,13 @@ let multiRobotAInfo: (string | string[])[];
 >getRobotB : () => [number, string, string]
 
 [numberB = -1] = [2, "trimmer", "trimming"];
->[numberB = -1] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB = -1] = [2, "trimmer", "trimming"] : [2, string, string]
 >[numberB = -1] : [number]
 >numberB = -1 : -1
 >numberB : number
 >-1 : -1
 >1 : 1
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, string, string]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -176,14 +176,14 @@ let multiRobotAInfo: (string | string[])[];
 >getMultiRobotB : () => [string, string[]]
 
 [nameMB = "helloNoName"] = ["trimmer", ["trimming", "edging"]];
->[nameMB = "helloNoName"] = ["trimmer", ["trimming", "edging"]] : [string, string[]]
+>[nameMB = "helloNoName"] = ["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >[nameMB = "helloNoName"] : [string]
 >nameMB = "helloNoName" : "helloNoName"
 >nameMB : string
 >"helloNoName" : "helloNoName"
->["trimmer", ["trimming", "edging"]] : [string, string[]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ("trimming" | "edging")[]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : string[]
+>["trimming", "edging"] : ("trimming" | "edging")[]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -219,7 +219,7 @@ let multiRobotAInfo: (string | string[])[];
 >getRobotB : () => [number, string, string]
 
 [numberB = -1, nameB = "helloNoName", skillB = "noSkill"] = [2, "trimmer", "trimming"];
->[numberB = -1, nameB = "helloNoName", skillB = "noSkill"] = [2, "trimmer", "trimming"] : [number, string, string]
+>[numberB = -1, nameB = "helloNoName", skillB = "noSkill"] = [2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >[numberB = -1, nameB = "helloNoName", skillB = "noSkill"] : [number, string, string]
 >numberB = -1 : -1
 >numberB : number
@@ -231,7 +231,7 @@ let multiRobotAInfo: (string | string[])[];
 >skillB = "noSkill" : "noSkill"
 >skillB : string
 >"noSkill" : "noSkill"
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
@@ -272,7 +272,7 @@ let multiRobotAInfo: (string | string[])[];
 >getMultiRobotB : () => [string, string[]]
 
 [nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =
->[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =    ["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] =    ["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >[nameMB = "helloNoName", [primarySkillB = "noSkill", secondarySkillB = "noSkill"] = []] : [string, [string, string]]
 >nameMB = "helloNoName" : "helloNoName"
 >nameMB : string
@@ -288,9 +288,9 @@ let multiRobotAInfo: (string | string[])[];
 >[] : [string, string]
 
     ["trimmer", ["trimming", "edging"]];
->["trimmer", ["trimming", "edging"]] : [string, [string, string]]
+>["trimmer", ["trimming", "edging"]] : ["trimmer", ["trimming", "edging"]]
 >"trimmer" : "trimmer"
->["trimming", "edging"] : [string, string]
+>["trimming", "edging"] : ["trimming", "edging"]
 >"trimming" : "trimming"
 >"edging" : "edging"
 
@@ -328,7 +328,7 @@ let multiRobotAInfo: (string | string[])[];
 >robotAInfo : (string | number)[]
 ><Robot>[2, "trimmer", "trimming"] : [number, string, string]
 >Robot : [number, string, string]
->[2, "trimmer", "trimming"] : [number, string, string]
+>[2, "trimmer", "trimming"] : [2, "trimmer", "trimming"]
 >2 : 2
 >"trimmer" : "trimmer"
 >"trimming" : "trimming"
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementDefaultValues.types
index fbce7dedef15a..67f17142a65ec 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementDefaultValues.types
@@ -22,7 +22,7 @@ var hello = "hello";
 var robotA: Robot = { name: "mower", skill: "mowing" };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skill: "mowing" } : { name: string; skill: string; }
+>{ name: "mower", skill: "mowing" } : { name: "mower"; skill: "mowing"; }
 >name : string
 >"mower" : "mower"
 >skill : string
@@ -31,7 +31,7 @@ var robotA: Robot = { name: "mower", skill: "mowing" };
 var robotB: Robot = { name: "trimmer", skill: "trimming" };
 >robotB : Robot
 >Robot : Robot
->{ name: "trimmer", skill: "trimming" } : { name: string; skill: string; }
+>{ name: "trimmer", skill: "trimming" } : { name: "trimmer"; skill: "trimming"; }
 >name : string
 >"trimmer" : "trimmer"
 >skill : string
@@ -59,7 +59,7 @@ var { name: nameC = "<NoName>", skill: skillC = "<skillUnspecified>" } = { name:
 >skill : any
 >skillC : string
 >"<skillUnspecified>" : "<skillUnspecified>"
->{ name: "Edger", skill: "cutting edges" } : { name?: string; skill?: string; }
+>{ name: "Edger", skill: "cutting edges" } : { name?: "Edger"; skill?: "cutting edges"; }
 >name : string
 >"Edger" : "Edger"
 >skill : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPattern.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPattern.types
index cf60c4a515fb9..f56500687ca2c 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPattern.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPattern.types
@@ -26,11 +26,11 @@ interface Robot {
 var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -39,11 +39,11 @@ var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "no
 var robotB: Robot = { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } };
 >robotB : Robot
 >Robot : Robot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPatternWithDefaultValues.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPatternWithDefaultValues.types
index fa007d9a2fc3b..9a4d06c7e2636 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPatternWithDefaultValues.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementNestedObjectBindingPatternWithDefaultValues.types
@@ -26,11 +26,11 @@ interface Robot {
 var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "none" } };
 >robotA : Robot
 >Robot : Robot
->{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "mower", skills: { primary: "mowing", secondary: "none" } } : { name: "mower"; skills: { primary: "mowing"; secondary: "none"; }; }
 >name : string
 >"mower" : "mower"
->skills : { primary: string; secondary: string; }
->{ primary: "mowing", secondary: "none" } : { primary: string; secondary: string; }
+>skills : { primary: "mowing"; secondary: "none"; }
+>{ primary: "mowing", secondary: "none" } : { primary: "mowing"; secondary: "none"; }
 >primary : string
 >"mowing" : "mowing"
 >secondary : string
@@ -39,11 +39,11 @@ var robotA: Robot = { name: "mower", skills: { primary: "mowing", secondary: "no
 var robotB: Robot = { name: "trimmer", skills: { primary: "trimming", secondary: "edging" } };
 >robotB : Robot
 >Robot : Robot
->{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "trimmer", skills: { primary: "trimming", secondary: "edging" } } : { name: "trimmer"; skills: { primary: "trimming"; secondary: "edging"; }; }
 >name : string
 >"trimmer" : "trimmer"
->skills : { primary: string; secondary: string; }
->{ primary: "trimming", secondary: "edging" } : { primary: string; secondary: string; }
+>skills : { primary: "trimming"; secondary: "edging"; }
+>{ primary: "trimming", secondary: "edging" } : { primary: "trimming"; secondary: "edging"; }
 >primary : string
 >"trimming" : "trimming"
 >secondary : string
@@ -64,7 +64,7 @@ var {
 >"noSkill" : "noSkill"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -93,7 +93,7 @@ var {
 >"noSkill" : "noSkill"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -122,7 +122,7 @@ var {
 >"noSkill" : "noSkill"
 
     } = { primary: "noSkill", secondary: "noSkill" }
->{ primary: "noSkill", secondary: "noSkill" } : { primary?: string; secondary?: string; }
+>{ primary: "noSkill", secondary: "noSkill" } : { primary?: "noSkill"; secondary?: "noSkill"; }
 >primary : string
 >"noSkill" : "noSkill"
 >secondary : string
@@ -131,11 +131,11 @@ var {
 } = <Robot>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } };
 ><Robot>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : Robot
 >Robot : Robot
->{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: string; skills: { primary: string; secondary: string; }; }
+>{ name: "Edger", skills: { primary: "edging", secondary: "branch trimming" } } : { name: "Edger"; skills: { primary: "edging"; secondary: "branch trimming"; }; }
 >name : string
 >"Edger" : "Edger"
->skills : { primary: string; secondary: string; }
->{ primary: "edging", secondary: "branch trimming" } : { primary: string; secondary: string; }
+>skills : { primary: "edging"; secondary: "branch trimming"; }
+>{ primary: "edging", secondary: "branch trimming" } : { primary: "edging"; secondary: "branch trimming"; }
 >primary : string
 >"edging" : "edging"
 >secondary : string
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern3.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern3.types
index c4ad284f293b0..61a69e9d81b96 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern3.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern3.types
@@ -2,7 +2,7 @@
 var {x = 500} = { x: 20 };
 >x : number
 >500 : 500
->{ x: 20 } : { x?: number; }
+>{ x: 20 } : { x?: 20; }
 >x : number
 >20 : 20
 
diff --git a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern4.types b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern4.types
index 3952961897d87..8f8c87004728f 100644
--- a/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern4.types
+++ b/tests/baselines/reference/sourceMapValidationDestructuringVariableStatementObjectBindingPattern4.types
@@ -5,7 +5,7 @@ var {x = 500,
 
      y} = { x: 20, y: "hi" };
 >y : string
->{ x: 20, y: "hi" } : { x?: number; y: string; }
+>{ x: 20, y: "hi" } : { x?: 20; y: string; }
 >x : number
 >20 : 20
 >y : string
diff --git a/tests/baselines/reference/specializedSignatureAsCallbackParameter1.types b/tests/baselines/reference/specializedSignatureAsCallbackParameter1.types
index 24f18fab3e393..a5b7e641e80cd 100644
--- a/tests/baselines/reference/specializedSignatureAsCallbackParameter1.types
+++ b/tests/baselines/reference/specializedSignatureAsCallbackParameter1.types
@@ -27,7 +27,7 @@ x3(1, (x: string) => 1);
 >x3(1, (x: string) => 1) : any
 >x3 : { (a: number, cb: (x: number) => number): any; (a: string, cb: (x: number) => number): any; }
 >1 : 1
->(x: string) => 1 : (x: string) => number
+>(x: string) => 1 : (x: string) => 1
 >x : string
 >1 : 1
 
@@ -35,7 +35,7 @@ x3(1, (x: 'hm') => 1);
 >x3(1, (x: 'hm') => 1) : any
 >x3 : { (a: number, cb: (x: number) => number): any; (a: string, cb: (x: number) => number): any; }
 >1 : 1
->(x: 'hm') => 1 : (x: "hm") => number
+>(x: 'hm') => 1 : (x: "hm") => 1
 >x : "hm"
 >1 : 1
 
diff --git a/tests/baselines/reference/spreadMethods.types b/tests/baselines/reference/spreadMethods.types
index de48bedeffcec..8718c35a8c942 100644
--- a/tests/baselines/reference/spreadMethods.types
+++ b/tests/baselines/reference/spreadMethods.types
@@ -51,7 +51,7 @@ ssk.m(); // error
 let i: I = { p: 12, m() { } };
 >i : I
 >I : I
->{ p: 12, m() { } } : { p: number; m(): void; }
+>{ p: 12, m() { } } : { p: 12; m(): void; }
 >p : number
 >12 : 12
 >m : () => void
diff --git a/tests/baselines/reference/spreadTypeRemovesReadonly.types b/tests/baselines/reference/spreadTypeRemovesReadonly.types
index 862cacb8a1b1a..22feaf54eb6c9 100644
--- a/tests/baselines/reference/spreadTypeRemovesReadonly.types
+++ b/tests/baselines/reference/spreadTypeRemovesReadonly.types
@@ -9,7 +9,7 @@ interface ReadonlyData {
 const data: ReadonlyData = { value: 'foo' };
 >data : ReadonlyData
 >ReadonlyData : ReadonlyData
->{ value: 'foo' } : { value: string; }
+>{ value: 'foo' } : { value: "foo"; }
 >value : string
 >'foo' : "foo"
 
diff --git a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
index 9cd8571bf6129..0d5782f7fa731 100644
--- a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
+++ b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
@@ -756,7 +756,7 @@ let cloned = ListWrapper.clone(ListWrapper, [1,2,3,4]);
 >ListWrapper : typeof ListWrapper
 >clone : <T>(dit: typeof ListWrapper, array: T[]) => T[]
 >ListWrapper : typeof ListWrapper
->[1,2,3,4] : number[]
+>[1,2,3,4] : (1 | 3 | 2 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.types b/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.types
index fcbf7782fb35b..527fa6ce4db05 100644
--- a/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.types
+++ b/tests/baselines/reference/staticMemberAssignsToConstructorFunctionMembers.types
@@ -34,11 +34,11 @@ class C {
 >x : number
 
         C.bar = (x: number) => 1; // ok
->C.bar = (x: number) => 1 : (x: number) => number
+>C.bar = (x: number) => 1 : (x: number) => 1
 >C.bar : (x: number) => number
 >C : typeof C
 >bar : (x: number) => number
->(x: number) => 1 : (x: number) => number
+>(x: number) => 1 : (x: number) => 1
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
index 606cc39afef98..b41e7a4d2ac64 100644
--- a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
+++ b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
@@ -22,7 +22,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(71,5): error TS2411: Property 'foo' of type '() => string' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(73,5): error TS2411: Property '"4.0"' of type 'number' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(74,5): error TS2411: Property 'f' of type 'MyString' is not assignable to string index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(78,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(78,5): error TS2322: Type '{ a: ""; b: number; c: () => void; "d": ""; "e": number; 1.0: ""; 2.0: number; "3.0": ""; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
   Property 'b' is incompatible with index signature.
     Type 'number' is not assignable to type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -157,7 +157,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
     // error
     var b: { [x: string]: string; } = {
         ~
-!!! error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
+!!! error TS2322: Type '{ a: ""; b: number; c: () => void; "d": ""; "e": number; 1.0: ""; 2.0: number; "3.0": ""; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
 !!! error TS2322:   Property 'b' is incompatible with index signature.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
         a: '',
diff --git a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.types b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.types
index c6f3a412da1a5..c5a75391f450f 100644
--- a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.types
+++ b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.types
@@ -140,7 +140,7 @@ var a: {
 var b: { [x: string]: string; } = {
 >b : { [x: string]: string; }
 >x : string
->{    a: '',    b: 1,     c: () => { },     "d": '',     "e": 1,     1.0: '',    2.0: 1,     "3.0": '',     "4.0": 1,     f: <MyString>null,     get X() {         return '';    },    set X(v) { },     foo() {         return '';    }} : { a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }
+>{    a: '',    b: 1,     c: () => { },     "d": '',     "e": 1,     1.0: '',    2.0: 1,     "3.0": '',     "4.0": 1,     f: <MyString>null,     get X() {         return '';    },    set X(v) { },     foo() {         return '';    }} : { a: ""; b: number; c: () => void; "d": ""; "e": number; 1.0: ""; 2.0: number; "3.0": ""; "4.0": number; f: MyString; X: string; foo(): string; }
 
     a: '',
 >a : string
diff --git a/tests/baselines/reference/stringIndexingResults.types b/tests/baselines/reference/stringIndexingResults.types
index 9d7c19f49cc4a..bb0f025ed43f4 100644
--- a/tests/baselines/reference/stringIndexingResults.types
+++ b/tests/baselines/reference/stringIndexingResults.types
@@ -95,7 +95,7 @@ var r9 = a[1];
 var b: { [x: string]: string } = { y: '' }
 >b : { [x: string]: string; }
 >x : string
->{ y: '' } : { y: string; }
+>{ y: '' } : { y: ""; }
 >y : string
 >'' : ""
 
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags01.types b/tests/baselines/reference/stringLiteralTypesAsTags01.types
index 6caf851a72648..792e3bae5e23c 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags01.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags01.types
@@ -75,7 +75,7 @@ function hasKind(entity: Entity, kind: Kind): boolean {
 let x: A = {
 >x : A
 >A : A
->{    kind: "A",    a: 100,} : { kind: "A"; a: number; }
+>{    kind: "A",    a: 100,} : { kind: "A"; a: 100; }
 
     kind: "A",
 >kind : string
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags02.types b/tests/baselines/reference/stringLiteralTypesAsTags02.types
index f90ea6c6a0645..c287f7d81bae1 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags02.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags02.types
@@ -69,7 +69,7 @@ function hasKind(entity: Entity, kind: Kind): entity is (A | B) {
 let x: A = {
 >x : A
 >A : A
->{    kind: "A",    a: 100,} : { kind: "A"; a: number; }
+>{    kind: "A",    a: 100,} : { kind: "A"; a: 100; }
 
     kind: "A",
 >kind : string
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags03.types b/tests/baselines/reference/stringLiteralTypesAsTags03.types
index 64622e28ac828..9ffe463022799 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags03.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags03.types
@@ -72,7 +72,7 @@ function hasKind(entity: Entity, kind: Kind): entity is Entity {
 let x: A = {
 >x : A
 >A : A
->{    kind: "A",    a: 100,} : { kind: "A"; a: number; }
+>{    kind: "A",    a: 100,} : { kind: "A"; a: 100; }
 
     kind: "A",
 >kind : string
diff --git a/tests/baselines/reference/structural1.types b/tests/baselines/reference/structural1.types
index 12dfb25d91dda..2f625238f7ba2 100644
--- a/tests/baselines/reference/structural1.types
+++ b/tests/baselines/reference/structural1.types
@@ -21,7 +21,7 @@ module M {
     f({salt:2,pepper:0});
 >f({salt:2,pepper:0}) : void
 >f : (i: I) => void
->{salt:2,pepper:0} : { salt: number; pepper: number; }
+>{salt:2,pepper:0} : { salt: 2; pepper: 0; }
 >salt : number
 >2 : 2
 >pepper : number
diff --git a/tests/baselines/reference/subtypeRelationForNever.types b/tests/baselines/reference/subtypeRelationForNever.types
index 67c92b9b079e2..bbe5747fe0b49 100644
--- a/tests/baselines/reference/subtypeRelationForNever.types
+++ b/tests/baselines/reference/subtypeRelationForNever.types
@@ -47,7 +47,7 @@ const result = withFew([1, 2, 3], id, fail); // expected result is number[]
 >result : number[]
 >withFew([1, 2, 3], id, fail) : number[]
 >withFew : <a, r>(values: a[], haveFew: (values: a[]) => r, haveNone: (reason: string) => r) => r
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/superPropertyAccess.types b/tests/baselines/reference/superPropertyAccess.types
index 3d1161355a300..decca6e6e0947 100644
--- a/tests/baselines/reference/superPropertyAccess.types
+++ b/tests/baselines/reference/superPropertyAccess.types
@@ -91,11 +91,11 @@ class MyDerived extends MyBase {
 >d2 : number
 
         super.m1 = function (a: string) { return ""; };     // Should be allowed, we will not restrict assignment
->super.m1 = function (a: string) { return ""; } : (a: string) => string
+>super.m1 = function (a: string) { return ""; } : (a: string) => ""
 >super.m1 : (a: string) => string
 >super : MyBase
 >m1 : (a: string) => string
->function (a: string) { return ""; } : (a: string) => string
+>function (a: string) { return ""; } : (a: string) => ""
 >a : string
 >"" : ""
 
diff --git a/tests/baselines/reference/symbolProperty21.errors.txt b/tests/baselines/reference/symbolProperty21.errors.txt
index 766af0659e8a9..b9083d185d220 100644
--- a/tests/baselines/reference/symbolProperty21.errors.txt
+++ b/tests/baselines/reference/symbolProperty21.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/Symbols/symbolProperty21.ts(10,5): error TS2345: Argument of type '{ [Symbol.isConcatSpreadable]: string; [Symbol.toPrimitive]: number; [Symbol.unscopables]: true; }' is not assignable to parameter of type 'I<boolean, string>'.
+tests/cases/conformance/es6/Symbols/symbolProperty21.ts(10,5): error TS2345: Argument of type '{ [Symbol.isConcatSpreadable]: ""; [Symbol.toPrimitive]: number; [Symbol.unscopables]: true; }' is not assignable to parameter of type 'I<boolean, string>'.
   Object literal may only specify known properties, and '[Symbol.toPrimitive]' does not exist in type 'I<boolean, string>'.
 
 
@@ -14,7 +14,7 @@ tests/cases/conformance/es6/Symbols/symbolProperty21.ts(10,5): error TS2345: Arg
         [Symbol.isConcatSpreadable]: "",
         [Symbol.toPrimitive]: 0,
         ~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ [Symbol.isConcatSpreadable]: string; [Symbol.toPrimitive]: number; [Symbol.unscopables]: true; }' is not assignable to parameter of type 'I<boolean, string>'.
+!!! error TS2345: Argument of type '{ [Symbol.isConcatSpreadable]: ""; [Symbol.toPrimitive]: number; [Symbol.unscopables]: true; }' is not assignable to parameter of type 'I<boolean, string>'.
 !!! error TS2345:   Object literal may only specify known properties, and '[Symbol.toPrimitive]' does not exist in type 'I<boolean, string>'.
         [Symbol.unscopables]: true
     });
\ No newline at end of file
diff --git a/tests/baselines/reference/syntaxErrors.types b/tests/baselines/reference/syntaxErrors.types
index e99e3b9b88ec2..db5ae9ac190a5 100644
--- a/tests/baselines/reference/syntaxErrors.types
+++ b/tests/baselines/reference/syntaxErrors.types
@@ -29,7 +29,7 @@ var x = f({ t: 1000 }, { t: 3000 });
 >{ t: 1000 } : { t: number; }
 >t : number
 >1000 : 1000
->{ t: 3000 } : { t: number; }
+>{ t: 3000 } : { t: 3000; }
 >t : number
 >3000 : 3000
 
diff --git a/tests/baselines/reference/taggedTemplateStringsTypeArgumentInference.types b/tests/baselines/reference/taggedTemplateStringsTypeArgumentInference.types
index d1be9c77cb984..1a652fb5839ff 100644
--- a/tests/baselines/reference/taggedTemplateStringsTypeArgumentInference.types
+++ b/tests/baselines/reference/taggedTemplateStringsTypeArgumentInference.types
@@ -400,13 +400,13 @@ var a9e = someGenerics9 `${ undefined }${ { x: 6, z: new Date() } }${ { x: 6, y:
 >someGenerics9 : <T>(strs: TemplateStringsArray, a: T, b: T, c: T) => T
 >`${ undefined }${ { x: 6, z: new Date() } }${ { x: 6, y: '' } }` : string
 >undefined : undefined
->{ x: 6, z: new Date() } : { x: number; z: Date; }
+>{ x: 6, z: new Date() } : { x: 6; z: Date; }
 >x : number
 >6 : 6
 >z : Date
 >new Date() : Date
 >Date : DateConstructor
->{ x: 6, y: '' } : { x: number; y: string; }
+>{ x: 6, y: '' } : { x: 6; y: ""; }
 >x : number
 >6 : 6
 >y : string
@@ -421,13 +421,13 @@ var a9d = someGenerics9 `${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }`;
 >someGenerics9 `${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }` : { x: number; }
 >someGenerics9 : <T>(strs: TemplateStringsArray, a: T, b: T, c: T) => T
 >`${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }` : string
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
 
diff --git a/tests/baselines/reference/taggedTemplateStringsTypeArgumentInferenceES6.types b/tests/baselines/reference/taggedTemplateStringsTypeArgumentInferenceES6.types
index e0a1d33937655..e62ed33f99063 100644
--- a/tests/baselines/reference/taggedTemplateStringsTypeArgumentInferenceES6.types
+++ b/tests/baselines/reference/taggedTemplateStringsTypeArgumentInferenceES6.types
@@ -400,13 +400,13 @@ var a9e = someGenerics9 `${ undefined }${ { x: 6, z: new Date() } }${ { x: 6, y:
 >someGenerics9 : <T>(strs: TemplateStringsArray, a: T, b: T, c: T) => T
 >`${ undefined }${ { x: 6, z: new Date() } }${ { x: 6, y: '' } }` : string
 >undefined : undefined
->{ x: 6, z: new Date() } : { x: number; z: Date; }
+>{ x: 6, z: new Date() } : { x: 6; z: Date; }
 >x : number
 >6 : 6
 >z : Date
 >new Date() : Date
 >Date : DateConstructor
->{ x: 6, y: '' } : { x: number; y: string; }
+>{ x: 6, y: '' } : { x: 6; y: ""; }
 >x : number
 >6 : 6
 >y : string
@@ -421,13 +421,13 @@ var a9d = someGenerics9 `${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }`;
 >someGenerics9 `${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }` : { x: number; }
 >someGenerics9 : <T>(strs: TemplateStringsArray, a: T, b: T, c: T) => T
 >`${ { x: 3 }}${ { x: 6 }}${ { x: 6 } }` : string
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
 
diff --git a/tests/baselines/reference/targetTypeCastTest.types b/tests/baselines/reference/targetTypeCastTest.types
index e2a7db86815f5..f6a657a208cb4 100644
--- a/tests/baselines/reference/targetTypeCastTest.types
+++ b/tests/baselines/reference/targetTypeCastTest.types
@@ -57,7 +57,7 @@ interface Adder2 {
 var add2: Adder2 = function(x,y) {
 >add2 : Adder2
 >Adder2 : Adder2
->function(x,y) {    return 0;} : (x: number, y: number) => number
+>function(x,y) {    return 0;} : (x: number, y: number) => 0
 >x : number
 >y : number
 
diff --git a/tests/baselines/reference/targetTypeObjectLiteral.types b/tests/baselines/reference/targetTypeObjectLiteral.types
index 5f80a01bf0cb9..673cdb83c32f0 100644
--- a/tests/baselines/reference/targetTypeObjectLiteral.types
+++ b/tests/baselines/reference/targetTypeObjectLiteral.types
@@ -4,15 +4,15 @@ var z: { x: number; y: (w:string)=>number;} = {
 >x : number
 >y : (w: string) => number
 >w : string
->{    x: 12,    y: function(w) {        return 0;    }} : { x: number; y: (w: string) => number; }
+>{    x: 12,    y: function(w) {        return 0;    }} : { x: 12; y: (w: string) => 0; }
 
     x: 12,
 >x : number
 >12 : 12
 
     y: function(w) {
->y : (w: string) => number
->function(w) {        return 0;    } : (w: string) => number
+>y : (w: string) => 0
+>function(w) {        return 0;    } : (w: string) => 0
 >w : string
 
         return 0;
diff --git a/tests/baselines/reference/targetTypeTest1.types b/tests/baselines/reference/targetTypeTest1.types
index d8f68f8fce1af..c672300f59467 100644
--- a/tests/baselines/reference/targetTypeTest1.types
+++ b/tests/baselines/reference/targetTypeTest1.types
@@ -116,11 +116,11 @@ var f : number = 5;
 // this in function add inferred to be type of object literal (i.e. Point)
 // dx, dy, and return type of add inferred using target typing
 Point.prototype = {
->Point.prototype = {    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: number; y: number; add: (dx: number, dy: number) => Point; }
+>Point.prototype = {    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: 0; y: 0; add: (dx: number, dy: number) => Point; }
 >Point.prototype : Point
 >Point : typeof Point
 >prototype : Point
->{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: number; y: number; add: (dx: number, dy: number) => Point; }
+>{    x: 0,    y: 0,    add: function(dx, dy) {        return new Point(this.x + dx, this.y + dy);    }} : { x: 0; y: 0; add: (dx: number, dy: number) => Point; }
 
     x: 0,
 >x : number
@@ -205,13 +205,13 @@ function C(a,b) {
 }
 
 C.prototype = 
->C.prototype = 	{	a:0,		b:0, 		C1M1: function(c,d) {     				return (this.a + c) + (this.b + d);			}	} : { a: number; b: number; C1M1: (c: number, d: number) => any; }
+>C.prototype = 	{	a:0,		b:0, 		C1M1: function(c,d) {     				return (this.a + c) + (this.b + d);			}	} : { a: 0; b: 0; C1M1: (c: number, d: number) => any; }
 >C.prototype : C
 >C : typeof C
 >prototype : C
 
 	{	a:0,
->{	a:0,		b:0, 		C1M1: function(c,d) {     				return (this.a + c) + (this.b + d);			}	} : { a: number; b: number; C1M1: (c: number, d: number) => any; }
+>{	a:0,		b:0, 		C1M1: function(c,d) {     				return (this.a + c) + (this.b + d);			}	} : { a: 0; b: 0; C1M1: (c: number, d: number) => any; }
 >a : number
 >0 : 0
 
diff --git a/tests/baselines/reference/targetTypeTest3.errors.txt b/tests/baselines/reference/targetTypeTest3.errors.txt
index f5dab732ed346..4af159284eb98 100644
--- a/tests/baselines/reference/targetTypeTest3.errors.txt
+++ b/tests/baselines/reference/targetTypeTest3.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/compiler/targetTypeTest3.ts(4,5): error TS2322: Type '(string | number)[]' is not assignable to type 'string[]'.
-  Type 'string | number' is not assignable to type 'string'.
+tests/cases/compiler/targetTypeTest3.ts(4,5): error TS2322: Type '(number | "3")[]' is not assignable to type 'string[]'.
+  Type 'number | "3"' is not assignable to type 'string'.
     Type 'number' is not assignable to type 'string'.
 
 
@@ -9,8 +9,8 @@ tests/cases/compiler/targetTypeTest3.ts(4,5): error TS2322: Type '(string | numb
     
     var a : string[] = [1,2,"3"]; // should produce an error
         ~
-!!! error TS2322: Type '(string | number)[]' is not assignable to type 'string[]'.
-!!! error TS2322:   Type 'string | number' is not assignable to type 'string'.
+!!! error TS2322: Type '(number | "3")[]' is not assignable to type 'string[]'.
+!!! error TS2322:   Type 'number | "3"' is not assignable to type 'string'.
 !!! error TS2322:     Type 'number' is not assignable to type 'string'.
     
     
diff --git a/tests/baselines/reference/targetTypeTest3.types b/tests/baselines/reference/targetTypeTest3.types
index b8e882fa6a438..12c7c61238f7b 100644
--- a/tests/baselines/reference/targetTypeTest3.types
+++ b/tests/baselines/reference/targetTypeTest3.types
@@ -4,7 +4,7 @@
 
 var a : string[] = [1,2,"3"]; // should produce an error
 >a : string[]
->[1,2,"3"] : (string | number)[]
+>[1,2,"3"] : (number | "3")[]
 >1 : 1
 >2 : 2
 >"3" : "3"
diff --git a/tests/baselines/reference/thisTypeInAccessorsNegative.types b/tests/baselines/reference/thisTypeInAccessorsNegative.types
index 3b307327c5e09..f28191bd75ef7 100644
--- a/tests/baselines/reference/thisTypeInAccessorsNegative.types
+++ b/tests/baselines/reference/thisTypeInAccessorsNegative.types
@@ -44,7 +44,7 @@ const mismatch = {
 const contextual: Foo = {
 >contextual : Foo
 >Foo : Foo
->{    n: 16,    get x() { return this.n; }} : { n: number; readonly x: number; }
+>{    n: 16,    get x() { return this.n; }} : { n: 16; readonly x: number; }
 
     n: 16,
 >n : number
diff --git a/tests/baselines/reference/thisTypeInFunctions.types b/tests/baselines/reference/thisTypeInFunctions.types
index a2aaba4cdd736..5b8449086a27d 100644
--- a/tests/baselines/reference/thisTypeInFunctions.types
+++ b/tests/baselines/reference/thisTypeInFunctions.types
@@ -132,7 +132,7 @@ function implicitThis(n: number): number {
 let impl: I = {
 >impl : I
 >I : I
->{    a: 12,    explicitVoid2: () => this.a, // ok, this: any because it refers to some outer object (window?)    explicitVoid1() { return 12; },    explicitStructural() {        return this.a;    },    explicitInterface() {        return this.a;    },    explicitThis() {        return this.a;    },} : { a: number; explicitVoid2: () => any; explicitVoid1(this: void): number; explicitStructural(this: { a: number; }): number; explicitInterface(this: I): number; explicitThis(this: I): number; }
+>{    a: 12,    explicitVoid2: () => this.a, // ok, this: any because it refers to some outer object (window?)    explicitVoid1() { return 12; },    explicitStructural() {        return this.a;    },    explicitInterface() {        return this.a;    },    explicitThis() {        return this.a;    },} : { a: 12; explicitVoid2: () => any; explicitVoid1(this: void): 12; explicitStructural(this: { a: number; }): number; explicitInterface(this: I): number; explicitThis(this: I): number; }
 
     a: 12,
 >a : number
@@ -146,7 +146,7 @@ let impl: I = {
 >a : any
 
     explicitVoid1() { return 12; },
->explicitVoid1 : (this: void) => number
+>explicitVoid1 : (this: void) => 12
 >12 : 12
 
     explicitStructural() {
@@ -178,19 +178,19 @@ let impl: I = {
     },
 }
 impl.explicitVoid1 = function () { return 12; };
->impl.explicitVoid1 = function () { return 12; } : (this: void) => number
+>impl.explicitVoid1 = function () { return 12; } : (this: void) => 12
 >impl.explicitVoid1 : (this: void) => number
 >impl : I
 >explicitVoid1 : (this: void) => number
->function () { return 12; } : (this: void) => number
+>function () { return 12; } : (this: void) => 12
 >12 : 12
 
 impl.explicitVoid2 = () => 12;
->impl.explicitVoid2 = () => 12 : () => number
+>impl.explicitVoid2 = () => 12 : () => 12
 >impl.explicitVoid2 : (this: void) => number
 >impl : I
 >explicitVoid2 : (this: void) => number
->() => 12 : () => number
+>() => 12 : () => 12
 >12 : 12
 
 impl.explicitStructural = function() { return this.a; };
@@ -214,19 +214,19 @@ impl.explicitInterface = function() { return this.a; };
 >a : number
 
 impl.explicitStructural = () => 12;
->impl.explicitStructural = () => 12 : () => number
+>impl.explicitStructural = () => 12 : () => 12
 >impl.explicitStructural : (this: { a: number; }) => number
 >impl : I
 >explicitStructural : (this: { a: number; }) => number
->() => 12 : () => number
+>() => 12 : () => 12
 >12 : 12
 
 impl.explicitInterface = () => 12;
->impl.explicitInterface = () => 12 : () => number
+>impl.explicitInterface = () => 12 : () => 12
 >impl.explicitInterface : (this: I) => number
 >impl : I
 >explicitInterface : (this: I) => number
->() => 12 : () => number
+>() => 12 : () => 12
 >12 : 12
 
 impl.explicitThis = function () { return this.a; };
@@ -247,7 +247,7 @@ let ok: {y: number, f: (this: { y: number }, x: number) => number} = { y: 12, f:
 >this : { y: number; }
 >y : number
 >x : number
->{ y: 12, f: explicitStructural } : { y: number; f: (this: { y: number; }, x: number) => number; }
+>{ y: 12, f: explicitStructural } : { y: 12; f: (this: { y: number; }, x: number) => number; }
 >y : number
 >12 : 12
 >f : (this: { y: number; }, x: number) => number
@@ -258,7 +258,7 @@ let implicitAnyOk: {notSpecified: number, f: (x: number) => number} = { notSpeci
 >notSpecified : number
 >f : (x: number) => number
 >x : number
->{ notSpecified: 12, f: implicitThis } : { notSpecified: number; f: (n: number) => number; }
+>{ notSpecified: 12, f: implicitThis } : { notSpecified: 12; f: (n: number) => number; }
 >notSpecified : number
 >12 : 12
 >f : (n: number) => number
@@ -371,7 +371,7 @@ let reconstructed: {
 >m : number
 
 } = { 
->{     n: 12,    explicitThis: c.explicitThis,    explicitC: c.explicitC,    explicitProperty: c.explicitProperty,    explicitVoid: c.explicitVoid} : { n: number; explicitThis: (this: C, m: number) => number; explicitC: (this: C, m: number) => number; explicitProperty: (this: { n: number; }, m: number) => number; explicitVoid: (this: void, m: number) => number; }
+>{     n: 12,    explicitThis: c.explicitThis,    explicitC: c.explicitC,    explicitProperty: c.explicitProperty,    explicitVoid: c.explicitVoid} : { n: 12; explicitThis: (this: C, m: number) => number; explicitC: (this: C, m: number) => number; explicitProperty: (this: { n: number; }, m: number) => number; explicitVoid: (this: void, m: number) => number; }
 
     n: 12,
 >n : number
diff --git a/tests/baselines/reference/thisTypeInFunctions2.types b/tests/baselines/reference/thisTypeInFunctions2.types
index a527429ccd9ce..b70d19cf8dec1 100644
--- a/tests/baselines/reference/thisTypeInFunctions2.types
+++ b/tests/baselines/reference/thisTypeInFunctions2.types
@@ -128,7 +128,7 @@ extend2({
 simple({
 >simple({    foo(n) {        return n.length + this.bar();    },    bar() {        return 14;    }}) : void
 >simple : (arg: SimpleInterface) => void
->{    foo(n) {        return n.length + this.bar();    },    bar() {        return 14;    }} : { foo(n: string): number; bar(): number; }
+>{    foo(n) {        return n.length + this.bar();    },    bar() {        return 14;    }} : { foo(n: string): number; bar(): 14; }
 
     foo(n) {
 >foo : (n: string) => number
@@ -146,7 +146,7 @@ simple({
 
     },
     bar() {
->bar : () => number
+>bar : () => 14
 
         return 14;
 >14 : 14
diff --git a/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt b/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
index 56ac090c02c9f..e6d45c5825939 100644
--- a/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
+++ b/tests/baselines/reference/thisTypeInFunctionsNegative.errors.txt
@@ -4,11 +4,11 @@ tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(49,1): err
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(51,1): error TS2684: The 'this' context of type 'void' is not assignable to method's 'this' of type 'I'.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(56,21): error TS2339: Property 'notFound' does not exist on type '{ y: number; }'.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(59,21): error TS2339: Property 'notSpecified' does not exist on type 'void'.
-tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(61,79): error TS2322: Type '{ y: number; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
+tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(61,79): error TS2322: Type '{ y: 12; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
-tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(62,97): error TS2322: Type '{ y: string; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
+tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(62,97): error TS2322: Type '{ y: "foo"; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
-tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(63,110): error TS2322: Type '{ wrongName: number; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
+tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(63,110): error TS2322: Type '{ wrongName: 12; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(65,1): error TS2554: Expected 1 arguments, but got 0.
 tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(66,6): error TS2345: Argument of type '"wrong type"' is not assignable to parameter of type 'number'.
@@ -174,15 +174,15 @@ tests/cases/conformance/types/thisType/thisTypeInFunctionsNegative.ts(175,35): e
     }
     let ok: {y: number, f: (this: { y: number }, x: number) => number} = { y: 12, explicitStructural };
                                                                                   ~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ y: number; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
+!!! error TS2322: Type '{ y: 12; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ y: number; f: (this: { y: number; }, x: number) => number; }'.
     let wrongPropertyType: {y: string, f: (this: { y: number }, x: number) => number} = { y: 'foo', explicitStructural };
                                                                                                     ~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ y: string; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
+!!! error TS2322: Type '{ y: "foo"; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ y: string; f: (this: { y: number; }, x: number) => number; }'.
     let wrongPropertyName: {wrongName: number, f: (this: { y: number }, x: number) => number} = { wrongName: 12, explicitStructural };
                                                                                                                  ~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ wrongName: number; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
+!!! error TS2322: Type '{ wrongName: 12; explicitStructural: (this: { y: number; }, x: number) => number; }' is not assignable to type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'explicitStructural' does not exist in type '{ wrongName: number; f: (this: { y: number; }, x: number) => number; }'.
     
     ok.f(); // not enough arguments
diff --git a/tests/baselines/reference/thisTypeInFunctionsNegative.types b/tests/baselines/reference/thisTypeInFunctionsNegative.types
index a5a8db3e2ee26..dff07a72305b3 100644
--- a/tests/baselines/reference/thisTypeInFunctionsNegative.types
+++ b/tests/baselines/reference/thisTypeInFunctionsNegative.types
@@ -130,7 +130,7 @@ interface I {
 let impl: I = {
 >impl : I
 >I : I
->{    a: 12,    explicitVoid1() {        return this.a; // error, no 'a' in 'void'    },    explicitVoid2: () => this.a, // ok, `this:any` because it refers to an outer object    explicitStructural: () => 12,    explicitInterface: () => 12,    explicitThis() {        return this.a;    },} : { a: number; explicitVoid1(this: void): any; explicitVoid2: () => any; explicitStructural: () => number; explicitInterface: () => number; explicitThis(this: I): number; }
+>{    a: 12,    explicitVoid1() {        return this.a; // error, no 'a' in 'void'    },    explicitVoid2: () => this.a, // ok, `this:any` because it refers to an outer object    explicitStructural: () => 12,    explicitInterface: () => 12,    explicitThis() {        return this.a;    },} : { a: 12; explicitVoid1(this: void): any; explicitVoid2: () => any; explicitStructural: () => 12; explicitInterface: () => 12; explicitThis(this: I): number; }
 
     a: 12,
 >a : number
@@ -153,13 +153,13 @@ let impl: I = {
 >a : any
 
     explicitStructural: () => 12,
->explicitStructural : () => number
->() => 12 : () => number
+>explicitStructural : () => 12
+>() => 12 : () => 12
 >12 : 12
 
     explicitInterface: () => 12,
->explicitInterface : () => number
->() => 12 : () => number
+>explicitInterface : () => 12
+>() => 12 : () => 12
 >12 : 12
 
     explicitThis() {
@@ -237,7 +237,7 @@ let ok: {y: number, f: (this: { y: number }, x: number) => number} = { y: 12, ex
 >this : { y: number; }
 >y : number
 >x : number
->{ y: 12, explicitStructural } : { y: number; explicitStructural: (this: { y: number; }, x: number) => number; }
+>{ y: 12, explicitStructural } : { y: 12; explicitStructural: (this: { y: number; }, x: number) => number; }
 >y : number
 >12 : 12
 >explicitStructural : (this: { y: number; }, x: number) => number
@@ -249,7 +249,7 @@ let wrongPropertyType: {y: string, f: (this: { y: number }, x: number) => number
 >this : { y: number; }
 >y : number
 >x : number
->{ y: 'foo', explicitStructural } : { y: string; explicitStructural: (this: { y: number; }, x: number) => number; }
+>{ y: 'foo', explicitStructural } : { y: "foo"; explicitStructural: (this: { y: number; }, x: number) => number; }
 >y : string
 >'foo' : "foo"
 >explicitStructural : (this: { y: number; }, x: number) => number
@@ -261,7 +261,7 @@ let wrongPropertyName: {wrongName: number, f: (this: { y: number }, x: number) =
 >this : { y: number; }
 >y : number
 >x : number
->{ wrongName: 12, explicitStructural } : { wrongName: number; explicitStructural: (this: { y: number; }, x: number) => number; }
+>{ wrongName: 12, explicitStructural } : { wrongName: 12; explicitStructural: (this: { y: number; }, x: number) => number; }
 >wrongName : number
 >12 : 12
 >explicitStructural : (this: { y: number; }, x: number) => number
@@ -427,7 +427,7 @@ let reconstructed: {
 >m : number
 
 } = { 
->{     n: 12,    explicitThis: c.explicitThis,    explicitC: c.explicitC,    explicitProperty: c.explicitProperty,    explicitVoid: c.explicitVoid} : { n: number; explicitThis: (this: C, m: number) => number; explicitC: (this: C, m: number) => number; explicitProperty: (this: { n: number; }, m: number) => number; explicitVoid: (this: void, m: number) => number; }
+>{     n: 12,    explicitThis: c.explicitThis,    explicitC: c.explicitC,    explicitProperty: c.explicitProperty,    explicitVoid: c.explicitVoid} : { n: 12; explicitThis: (this: C, m: number) => number; explicitC: (this: C, m: number) => number; explicitProperty: (this: { n: number; }, m: number) => number; explicitVoid: (this: void, m: number) => number; }
 
     n: 12,
 >n : number
diff --git a/tests/baselines/reference/thisTypeInObjectLiterals2.types b/tests/baselines/reference/thisTypeInObjectLiterals2.types
index 746ca0eb264ac..dba7e9563cf63 100644
--- a/tests/baselines/reference/thisTypeInObjectLiterals2.types
+++ b/tests/baselines/reference/thisTypeInObjectLiterals2.types
@@ -93,7 +93,7 @@ type Point = {
 let p1: Point = {
 >p1 : Point
 >Point : Point
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -144,7 +144,7 @@ let p2: Point | null = {
 >p2 : Point | null
 >Point : Point
 >null : null
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -194,7 +194,7 @@ let p2: Point | null = {
 let p3: Point | undefined = {
 >p3 : Point | undefined
 >Point : Point
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -245,7 +245,7 @@ let p4: Point | null | undefined = {
 >p4 : Point | null | undefined
 >Point : Point
 >null : null
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -300,7 +300,7 @@ declare function f1(p: Point): void;
 f1({
 >f1({    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }}) : void
 >f1 : (p: Point) => void
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -356,7 +356,7 @@ declare function f2(p: Point | null | undefined): void;
 f2({
 >f2({    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }}) : void
 >f2 : (p: Point | null | undefined) => void
->{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: number; y: number; moveBy(dx: number, dy: number, dz: number | undefined): void; }
+>{    x: 10,    y: 20,    moveBy(dx, dy, dz) {        this.x += dx;        this.y += dy;        if (this.z && dz) {            this.z += dz;        }    }} : { x: 10; y: 20; moveBy(dx: number, dy: number, dz: number | undefined): void; }
 
     x: 10,
 >x : number
@@ -438,11 +438,11 @@ let x1 = makeObject({
 >x1 : { x: number; y: number; } & { moveBy(dx: number, dy: number): void; }
 >makeObject({    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }}) : { x: number; y: number; } & { moveBy(dx: number, dy: number): void; }
 >makeObject : <D, M>(desc: ObjectDescriptor<D, M>) => D & M
->{    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }} : { data: { x: number; y: number; }; methods: { moveBy(dx: number, dy: number): void; }; }
+>{    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }} : { data: { x: 0; y: 0; }; methods: { moveBy(dx: number, dy: number): void; }; }
 
     data: { x: 0, y: 0 },
->data : { x: number; y: number; }
->{ x: 0, y: 0 } : { x: number; y: number; }
+>data : { x: 0; y: 0; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -509,11 +509,11 @@ let x2 = makeObject2({
 >x2 : { x: number; y: number; } & { moveBy(dx: number, dy: number): void; }
 >makeObject2({    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }}) : { x: number; y: number; } & { moveBy(dx: number, dy: number): void; }
 >makeObject2 : <D, M>(desc: ObjectDescriptor<D, M>) => D & M
->{    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }} : { data: { x: number; y: number; }; methods: { moveBy(dx: number, dy: number): void; }; }
+>{    data: { x: 0, y: 0 },    methods: {        moveBy(dx: number, dy: number) {            this.x += dx;  // Strongly typed this            this.y += dy;  // Strongly typed this        }    }} : { data: { x: 0; y: 0; }; methods: { moveBy(dx: number, dy: number): void; }; }
 
     data: { x: 0, y: 0 },
->data : { x: number; y: number; }
->{ x: 0, y: 0 } : { x: number; y: number; }
+>data : { x: 0; y: 0; }
+>{ x: 0, y: 0 } : { x: 0; y: 0; }
 >x : number
 >0 : 0
 >y : number
@@ -616,7 +616,7 @@ let p10 = defineProp(p1, "foo", { value: 42 });
 >defineProp : <T, K extends string, U>(obj: T, name: K, desc: PropDesc<U> & ThisType<T>) => T & Record<K, U>
 >p1 : Point
 >"foo" : "foo"
->{ value: 42 } : { value: number; }
+>{ value: 42 } : { value: 42; }
 >value : number
 >42 : 42
 
@@ -676,11 +676,11 @@ let p12 = defineProps(p1, {
 >defineProps(p1, {    foo: {        value: 42    },    bar: {        get(): number {            return this.x;        },        set(value: number) {            this.x = value;        }    }}) : Point & { foo: number; bar: number; }
 >defineProps : <T, U>(obj: T, descs: PropDescMap<U> & ThisType<T>) => T & U
 >p1 : Point
->{    foo: {        value: 42    },    bar: {        get(): number {            return this.x;        },        set(value: number) {            this.x = value;        }    }} : { foo: { value: number; }; bar: { get(): number; set(value: number): void; }; }
+>{    foo: {        value: 42    },    bar: {        get(): number {            return this.x;        },        set(value: number) {            this.x = value;        }    }} : { foo: { value: 42; }; bar: { get(): number; set(value: number): void; }; }
 
     foo: {
->foo : { value: number; }
->{        value: 42    } : { value: number; }
+>foo : { value: 42; }
+>{        value: 42    } : { value: 42; }
 
         value: 42
 >value : number
@@ -816,8 +816,8 @@ let vue = new Vue({
     data: () => ({ x: 1, y: 2 }),
 >data : () => { x: number; y: number; }
 >() => ({ x: 1, y: 2 }) : () => { x: number; y: number; }
->({ x: 1, y: 2 }) : { x: number; y: number; }
->{ x: 1, y: 2 } : { x: number; y: number; }
+>({ x: 1, y: 2 }) : { x: 1; y: 2; }
+>{ x: 1, y: 2 } : { x: 1; y: 2; }
 >x : number
 >1 : 1
 >y : number
diff --git a/tests/baselines/reference/thisTypeInTuples.types b/tests/baselines/reference/thisTypeInTuples.types
index 3b6f995840ec6..b8b6b5a324838 100644
--- a/tests/baselines/reference/thisTypeInTuples.types
+++ b/tests/baselines/reference/thisTypeInTuples.types
@@ -9,7 +9,7 @@ interface Array<T> {
 
 let t: [number, string] = [42, "hello"];
 >t : [number, string]
->[42, "hello"] : [number, string]
+>[42, "hello"] : [42, "hello"]
 >42 : 42
 >"hello" : "hello"
 
diff --git a/tests/baselines/reference/trailingCommaInHeterogenousArrayLiteral1.errors.txt b/tests/baselines/reference/trailingCommaInHeterogenousArrayLiteral1.errors.txt
index 32c1a470bc380..0009de85ff5d3 100644
--- a/tests/baselines/reference/trailingCommaInHeterogenousArrayLiteral1.errors.txt
+++ b/tests/baselines/reference/trailingCommaInHeterogenousArrayLiteral1.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts(5,19): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-  Type 'string | number' is not assignable to type 'number'.
+tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts(5,19): error TS2345: Argument of type '(string | 1 | 2 | 5)[]' is not assignable to parameter of type 'number[]'.
+  Type 'string | 1 | 2 | 5' is not assignable to type 'number'.
     Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts(6,19): error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
+tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts(6,19): error TS2345: Argument of type '(string | 1 | 2 | 5)[]' is not assignable to parameter of type 'number[]'.
 
 
 ==== tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts (2 errors) ====
@@ -11,12 +11,12 @@ tests/cases/compiler/trailingCommaInHeterogenousArrayLiteral1.ts(6,19): error TS
             // these two should give the same error
             this.test([1, 2, "hi", 5, ]);
                       ~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
-!!! error TS2345:   Type 'string | number' is not assignable to type 'number'.
+!!! error TS2345: Argument of type '(string | 1 | 2 | 5)[]' is not assignable to parameter of type 'number[]'.
+!!! error TS2345:   Type 'string | 1 | 2 | 5' is not assignable to type 'number'.
 !!! error TS2345:     Type 'string' is not assignable to type 'number'.
             this.test([1, 2, "hi", 5]); 
                       ~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '(string | number)[]' is not assignable to parameter of type 'number[]'.
+!!! error TS2345: Argument of type '(string | 1 | 2 | 5)[]' is not assignable to parameter of type 'number[]'.
         }
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/tsxInferenceShouldNotYieldAnyOnUnions.types b/tests/baselines/reference/tsxInferenceShouldNotYieldAnyOnUnions.types
index 68ad55854a797..308af66de7986 100644
--- a/tests/baselines/reference/tsxInferenceShouldNotYieldAnyOnUnions.types
+++ b/tests/baselines/reference/tsxInferenceShouldNotYieldAnyOnUnions.types
@@ -52,27 +52,27 @@ function ShouldInferFromData<T>(props: Props<T>): JSX.Element {
 ShouldInferFromData({ data: "1" });
 >ShouldInferFromData({ data: "1" }) : JSX.Element
 >ShouldInferFromData : <T>(props: Props<T>) => JSX.Element
->{ data: "1" } : { data: string; }
+>{ data: "1" } : { data: "1"; }
 >data : string
 >"1" : "1"
 
 ShouldInferFromData({ data: "1", convert: n => "" + n });
 >ShouldInferFromData({ data: "1", convert: n => "" + n }) : JSX.Element
 >ShouldInferFromData : <T>(props: Props<T>) => JSX.Element
->{ data: "1", convert: n => "" + n } : { data: string; convert: (n: string) => string; }
+>{ data: "1", convert: n => "" + n } : { data: "1"; convert: (n: "1") => string; }
 >data : string
 >"1" : "1"
->convert : (n: string) => string
->n => "" + n : (n: string) => string
->n : string
+>convert : (n: "1") => string
+>n => "" + n : (n: "1") => string
+>n : "1"
 >"" + n : string
 >"" : ""
->n : string
+>n : "1"
 
 ShouldInferFromData({ data: 2, convert: n => "" + n });
 >ShouldInferFromData({ data: 2, convert: n => "" + n }) : JSX.Element
 >ShouldInferFromData : <T>(props: Props<T>) => JSX.Element
->{ data: 2, convert: n => "" + n } : { data: number; convert: (n: number) => string; }
+>{ data: 2, convert: n => "" + n } : { data: 2; convert: (n: number) => string; }
 >data : number
 >2 : 2
 >convert : (n: number) => string
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution11.types b/tests/baselines/reference/tsxSpreadAttributesResolution11.types
index bcf6690a60000..027dde56044af 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution11.types
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution11.types
@@ -20,7 +20,7 @@ const obj3: {y: true, overwrite: string } = {
 >y : true
 >true : true
 >overwrite : string
->{    y: true,    overwrite: "hi"} : { y: true; overwrite: string; }
+>{    y: true,    overwrite: "hi"} : { y: true; overwrite: "hi"; }
 
     y: true,
 >y : boolean
@@ -102,7 +102,7 @@ let x3 = <OverWriteAttr overwrite="hi" {...obj1} x={3} {...{y: true, x: 2, overw
 >obj1 : { x: 2; }
 >x : number
 >3 : 3
->{y: true, x: 2, overwrite:"world"} : { y: true; x: 2; overwrite: string; }
+>{y: true, x: 2, overwrite:"world"} : { y: true; x: 2; overwrite: "world"; }
 >y : boolean
 >true : true
 >x : number
@@ -117,7 +117,7 @@ let x4 = <OverWriteAttr {...{x: 2}} {...{overwrite: "world"}} {...{y: true}} />
 >{x: 2} : { x: 2; }
 >x : number
 >2 : 2
->{overwrite: "world"} : { overwrite: string; }
+>{overwrite: "world"} : { overwrite: "world"; }
 >overwrite : string
 >"world" : "world"
 >{y: true} : { y: true; }
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution12.types b/tests/baselines/reference/tsxSpreadAttributesResolution12.types
index bbeeac5a07385..12ca337f325b6 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution12.types
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution12.types
@@ -20,7 +20,7 @@ const obj3: {y: false, overwrite: string} = {
 >y : false
 >false : false
 >overwrite : string
->{    y: false,    overwrite: "hi"} : { y: false; overwrite: string; }
+>{    y: false,    overwrite: "hi"} : { y: false; overwrite: "hi"; }
 
     y: false,
 >y : boolean
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution4.types b/tests/baselines/reference/tsxSpreadAttributesResolution4.types
index bf952a719f967..534d2f88b4fe2 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution4.types
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution4.types
@@ -32,7 +32,7 @@ class Poisoned extends React.Component<PoisonedProp, {}> {
 const obj: PoisonedProp = {
 >obj : PoisonedProp
 >PoisonedProp : PoisonedProp
->{    x: "hello world",    y: 2} : { x: string; y: 2; }
+>{    x: "hello world",    y: 2} : { x: "hello world"; y: 2; }
 
     x: "hello world",
 >x : string
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.types b/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.types
index d1cc5774447df..d104a27158329 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.types
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.types
@@ -84,7 +84,7 @@ const c5 = <OneThing {...obj1} yy={42} {...{yy1: "hi"}}/>
 >obj1 : { yy: boolean; }
 >yy : number
 >42 : 42
->{yy1: "hi"} : { yy1: string; }
+>{yy1: "hi"} : { yy1: "hi"; }
 >yy1 : string
 >"hi" : "hi"
 
@@ -93,7 +93,7 @@ const c6 = <OneThing {...obj1} {...{yy: 10000, yy1: "true"}} />
 ><OneThing {...obj1} {...{yy: 10000, yy1: "true"}} /> : JSX.Element
 >OneThing : { (): JSX.Element; (l: { yy: number; yy1: string; }): JSX.Element; }
 >obj1 : { yy: boolean; }
->{yy: 10000, yy1: "true"} : { yy: number; yy1: string; }
+>{yy: 10000, yy1: "true"} : { yy: 10000; yy1: "true"; }
 >yy : number
 >10000 : 10000
 >yy1 : string
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.types b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.types
index 2758ca7e0df1a..a2da2d883d96c 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.types
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.types
@@ -110,8 +110,8 @@ let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val) => { }}
 >i : JSX.Element
 ><InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val) => { }} /> : JSX.Element
 >InferParamComponent : <T>(attr: InferParamProp<T>) => JSX.Element
->values : number[]
->[1, 2, 3, 4] : number[]
+>values : (1 | 2 | 3 | 4)[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.errors.txt b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.errors.txt
index 3e256c0e3a6a7..8db758b9b6a61 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.errors.txt
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.errors.txt
@@ -8,8 +8,8 @@ tests/cases/conformance/jsx/file.tsx(20,19): error TS2322: Type '{ func: (a: num
   Type '{ func: (a: number, b: string) => void; }' is not assignable to type '{ func: (arg: number) => void; }'.
     Types of property 'func' are incompatible.
       Type '(a: number, b: string) => void' is not assignable to type '(arg: number) => void'.
-tests/cases/conformance/jsx/file.tsx(31,30): error TS2322: Type '{ values: number[]; selectHandler: (val: string) => void; }' is not assignable to type 'IntrinsicAttributes & InferParamProp<number>'.
-  Type '{ values: number[]; selectHandler: (val: string) => void; }' is not assignable to type 'InferParamProp<number>'.
+tests/cases/conformance/jsx/file.tsx(31,30): error TS2322: Type '{ values: (1 | 2 | 3 | 4)[]; selectHandler: (val: string) => void; }' is not assignable to type 'IntrinsicAttributes & InferParamProp<number>'.
+  Type '{ values: (1 | 2 | 3 | 4)[]; selectHandler: (val: string) => void; }' is not assignable to type 'InferParamProp<number>'.
     Types of property 'selectHandler' are incompatible.
       Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
         Types of parameters 'val' and 'selectedVal' are incompatible.
@@ -62,8 +62,8 @@ tests/cases/conformance/jsx/file.tsx(31,30): error TS2322: Type '{ values: numbe
     // Error
     let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val: string) => { }} />;
                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type '{ values: number[]; selectHandler: (val: string) => void; }' is not assignable to type 'IntrinsicAttributes & InferParamProp<number>'.
-!!! error TS2322:   Type '{ values: number[]; selectHandler: (val: string) => void; }' is not assignable to type 'InferParamProp<number>'.
+!!! error TS2322: Type '{ values: (1 | 2 | 3 | 4)[]; selectHandler: (val: string) => void; }' is not assignable to type 'IntrinsicAttributes & InferParamProp<number>'.
+!!! error TS2322:   Type '{ values: (1 | 2 | 3 | 4)[]; selectHandler: (val: string) => void; }' is not assignable to type 'InferParamProp<number>'.
 !!! error TS2322:     Types of property 'selectHandler' are incompatible.
 !!! error TS2322:       Type '(val: string) => void' is not assignable to type '(selectedVal: number) => void'.
 !!! error TS2322:         Types of parameters 'val' and 'selectedVal' are incompatible.
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.types b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.types
index 851839ea921b6..baa71e83c6706 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.types
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.types
@@ -105,8 +105,8 @@ let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val: string)
 >i : JSX.Element
 ><InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val: string) => { }} /> : JSX.Element
 >InferParamComponent : <T>(attr: InferParamProp<T>) => JSX.Element
->values : number[]
->[1, 2, 3, 4] : number[]
+>values : (1 | 2 | 3 | 4)[]
+>[1, 2, 3, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >3 : 3
diff --git a/tests/baselines/reference/tsxUnionSpread.types b/tests/baselines/reference/tsxUnionSpread.types
index 11e6308fe18c4..715c0fb7b6a2f 100644
--- a/tests/baselines/reference/tsxUnionSpread.types
+++ b/tests/baselines/reference/tsxUnionSpread.types
@@ -38,7 +38,7 @@ function getProps(): AnimalInfo {
 
     // this may be from server or whatever ...
     return { type: 'Cat', subType: 'Large' };
->{ type: 'Cat', subType: 'Large' } : { type: "Cat"; subType: string; }
+>{ type: 'Cat', subType: 'Large' } : { type: "Cat"; subType: "Large"; }
 >type : string
 >'Cat' : "Cat"
 >subType : string
@@ -60,7 +60,7 @@ var component = <AnimalComponent {...props} />
 var props2:AnimalInfo = { type: 'Cat', subType: 'Large' };
 >props2 : AnimalInfo
 >AnimalInfo : AnimalInfo
->{ type: 'Cat', subType: 'Large' } : { type: "Cat"; subType: string; }
+>{ type: 'Cat', subType: 'Large' } : { type: "Cat"; subType: "Large"; }
 >type : string
 >'Cat' : "Cat"
 >subType : string
diff --git a/tests/baselines/reference/tupleTypes.errors.txt b/tests/baselines/reference/tupleTypes.errors.txt
index 16a8f66ba79a3..76af6c09d9d3d 100644
--- a/tests/baselines/reference/tupleTypes.errors.txt
+++ b/tests/baselines/reference/tupleTypes.errors.txt
@@ -1,11 +1,11 @@
 tests/cases/compiler/tupleTypes.ts(1,9): error TS1122: A tuple type element list cannot be empty.
 tests/cases/compiler/tupleTypes.ts(14,1): error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
   Property '0' is missing in type 'undefined[]'.
-tests/cases/compiler/tupleTypes.ts(15,1): error TS2322: Type '[number]' is not assignable to type '[number, string]'.
-  Property '1' is missing in type '[number]'.
+tests/cases/compiler/tupleTypes.ts(15,1): error TS2322: Type '[1]' is not assignable to type '[number, string]'.
+  Property '1' is missing in type '[1]'.
 tests/cases/compiler/tupleTypes.ts(17,1): error TS2322: Type '[string, number]' is not assignable to type '[number, string]'.
   Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/tupleTypes.ts(18,1): error TS2322: Type '[number, string, number]' is not assignable to type '[number, string]'.
+tests/cases/compiler/tupleTypes.ts(18,1): error TS2322: Type '[1, "hello", 2]' is not assignable to type '[number, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
 tests/cases/compiler/tupleTypes.ts(41,1): error TS2322: Type 'undefined[]' is not assignable to type '[number, string]'.
@@ -47,8 +47,8 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
 !!! error TS2322:   Property '0' is missing in type 'undefined[]'.
     t = [1];              // Error
     ~
-!!! error TS2322: Type '[number]' is not assignable to type '[number, string]'.
-!!! error TS2322:   Property '1' is missing in type '[number]'.
+!!! error TS2322: Type '[1]' is not assignable to type '[number, string]'.
+!!! error TS2322:   Property '1' is missing in type '[1]'.
     t = [1, "hello"];     // Ok
     t = ["hello", 1];     // Error
     ~
@@ -56,7 +56,7 @@ tests/cases/compiler/tupleTypes.ts(51,1): error TS2322: Type '[number, {}]' is n
 !!! error TS2322:   Type 'string' is not assignable to type 'number'.
     t = [1, "hello", 2];  // Error
     ~
-!!! error TS2322: Type '[number, string, number]' is not assignable to type '[number, string]'.
+!!! error TS2322: Type '[1, "hello", 2]' is not assignable to type '[number, string]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '3' is not assignable to type '2'.
     
diff --git a/tests/baselines/reference/tupleTypes.types b/tests/baselines/reference/tupleTypes.types
index 3f68d4c7e2d53..cbfae7cc6466b 100644
--- a/tests/baselines/reference/tupleTypes.types
+++ b/tests/baselines/reference/tupleTypes.types
@@ -47,15 +47,15 @@ t = [];               // Error
 >[] : undefined[]
 
 t = [1];              // Error
->t = [1] : [number]
+>t = [1] : [1]
 >t : [number, string]
->[1] : [number]
+>[1] : [1]
 >1 : 1
 
 t = [1, "hello"];     // Ok
->t = [1, "hello"] : [number, string]
+>t = [1, "hello"] : [1, "hello"]
 >t : [number, string]
->[1, "hello"] : [number, string]
+>[1, "hello"] : [1, "hello"]
 >1 : 1
 >"hello" : "hello"
 
@@ -67,9 +67,9 @@ t = ["hello", 1];     // Error
 >1 : 1
 
 t = [1, "hello", 2];  // Error
->t = [1, "hello", 2] : [number, string, number]
+>t = [1, "hello", 2] : [1, "hello", 2]
 >t : [number, string]
->[1, "hello", 2] : [number, string, number]
+>[1, "hello", 2] : [1, "hello", 2]
 >1 : 1
 >"hello" : "hello"
 >2 : 2
@@ -77,7 +77,7 @@ t = [1, "hello", 2];  // Error
 var tf: [string, (x: string) => number] = ["hello", x => x.length];
 >tf : [string, (x: string) => number]
 >x : string
->["hello", x => x.length] : [string, (x: string) => number]
+>["hello", x => x.length] : ["hello", (x: string) => number]
 >"hello" : "hello"
 >x => x.length : (x: string) => number
 >x : string
@@ -103,7 +103,7 @@ var ff1 = ff("hello", ["foo", x => x.length]);
 >ff("hello", ["foo", x => x.length]) : number
 >ff : <T, U>(a: T, b: [T, (x: T) => U]) => U
 >"hello" : "hello"
->["foo", x => x.length] : [string, (x: string) => number]
+>["foo", x => x.length] : ["foo", (x: string) => number]
 >"foo" : "foo"
 >x => x.length : (x: string) => number
 >x : string
@@ -174,9 +174,9 @@ tt = tuple2(1, undefined);
 >undefined : undefined
 
 tt = [1, undefined];
->tt = [1, undefined] : [number, undefined]
+>tt = [1, undefined] : [1, undefined]
 >tt : [number, string]
->[1, undefined] : [number, undefined]
+>[1, undefined] : [1, undefined]
 >1 : 1
 >undefined : undefined
 
diff --git a/tests/baselines/reference/typeAliases.types b/tests/baselines/reference/typeAliases.types
index 6c8e897480c8d..7da9d4051b421 100644
--- a/tests/baselines/reference/typeAliases.types
+++ b/tests/baselines/reference/typeAliases.types
@@ -231,7 +231,7 @@ f16(x);
 var y: StringAndBoolean = ["1", false];
 >y : [string, boolean]
 >StringAndBoolean : [string, boolean]
->["1", false] : [string, false]
+>["1", false] : ["1", false]
 >"1" : "1"
 >false : false
 
diff --git a/tests/baselines/reference/typeAnnotationBestCommonTypeInArrayLiteral.types b/tests/baselines/reference/typeAnnotationBestCommonTypeInArrayLiteral.types
index 66e35a5a5356d..18e16604d2ffc 100644
--- a/tests/baselines/reference/typeAnnotationBestCommonTypeInArrayLiteral.types
+++ b/tests/baselines/reference/typeAnnotationBestCommonTypeInArrayLiteral.types
@@ -23,9 +23,9 @@ interface IMenuItem {
 var menuData: IMenuItem[] = [
 >menuData : IMenuItem[]
 >IMenuItem : IMenuItem
->[    {        "id": "ourLogo",        "type": "image",        "link": "",        "icon": "modules/menu/logo.svg"    }, {        "id": "productName",        "type": "default",        "link": "",        "text": "Product Name"    }] : ({ "id": string; "type": string; "link": string; "icon": string; } | { "id": string; "type": string; "link": string; "text": string; })[]
+>[    {        "id": "ourLogo",        "type": "image",        "link": "",        "icon": "modules/menu/logo.svg"    }, {        "id": "productName",        "type": "default",        "link": "",        "text": "Product Name"    }] : ({ "id": "ourLogo"; "type": "image"; "link": ""; "icon": "modules/menu/logo.svg"; } | { "id": "productName"; "type": "default"; "link": ""; "text": "Product Name"; })[]
     {
->{        "id": "ourLogo",        "type": "image",        "link": "",        "icon": "modules/menu/logo.svg"    } : { "id": string; "type": string; "link": string; "icon": string; }
+>{        "id": "ourLogo",        "type": "image",        "link": "",        "icon": "modules/menu/logo.svg"    } : { "id": "ourLogo"; "type": "image"; "link": ""; "icon": "modules/menu/logo.svg"; }
 
         "id": "ourLogo",
 >"ourLogo" : "ourLogo"
@@ -40,7 +40,7 @@ var menuData: IMenuItem[] = [
 >"modules/menu/logo.svg" : "modules/menu/logo.svg"
 
     }, {
->{        "id": "productName",        "type": "default",        "link": "",        "text": "Product Name"    } : { "id": string; "type": string; "link": string; "text": string; }
+>{        "id": "productName",        "type": "default",        "link": "",        "text": "Product Name"    } : { "id": "productName"; "type": "default"; "link": ""; "text": "Product Name"; }
 
         "id": "productName",
 >"productName" : "productName"
diff --git a/tests/baselines/reference/typeArgInference2.types b/tests/baselines/reference/typeArgInference2.types
index 2b985a7c208b9..fc5cc252135a1 100644
--- a/tests/baselines/reference/typeArgInference2.types
+++ b/tests/baselines/reference/typeArgInference2.types
@@ -36,33 +36,33 @@ var z3 = foo({ name: null });         // { name: any }
 >null : null
 
 var z4 = foo({ name: "abc" });        // { name: string }
->z4 : { name: string; }
->foo({ name: "abc" }) : { name: string; }
+>z4 : { name: "abc"; }
+>foo({ name: "abc" }) : { name: "abc"; }
 >foo : <T extends Item>(x?: T, y?: T) => T
->{ name: "abc" } : { name: string; }
+>{ name: "abc" } : { name: "abc"; }
 >name : string
 >"abc" : "abc"
 
 var z5 = foo({ name: "abc", a: 5 });  // { name: string; a: number }
->z5 : { name: string; a: number; }
->foo({ name: "abc", a: 5 }) : { name: string; a: number; }
+>z5 : { name: "abc"; a: number; }
+>foo({ name: "abc", a: 5 }) : { name: "abc"; a: number; }
 >foo : <T extends Item>(x?: T, y?: T) => T
->{ name: "abc", a: 5 } : { name: string; a: number; }
+>{ name: "abc", a: 5 } : { name: "abc"; a: 5; }
 >name : string
 >"abc" : "abc"
 >a : number
 >5 : 5
 
 var z6 = foo({ name: "abc", a: 5 }, { name: "def", b: 5 });  // error
->z6 : { name: string; a: number; b?: undefined; } | { name: string; b: number; a?: undefined; }
->foo({ name: "abc", a: 5 }, { name: "def", b: 5 }) : { name: string; a: number; b?: undefined; } | { name: string; b: number; a?: undefined; }
+>z6 : { name: "abc"; a: number; b?: undefined; } | { name: "def"; b: number; a?: undefined; }
+>foo({ name: "abc", a: 5 }, { name: "def", b: 5 }) : { name: "abc"; a: number; b?: undefined; } | { name: "def"; b: number; a?: undefined; }
 >foo : <T extends Item>(x?: T, y?: T) => T
->{ name: "abc", a: 5 } : { name: string; a: number; }
+>{ name: "abc", a: 5 } : { name: "abc"; a: 5; }
 >name : string
 >"abc" : "abc"
 >a : number
 >5 : 5
->{ name: "def", b: 5 } : { name: string; b: number; }
+>{ name: "def", b: 5 } : { name: "def"; b: 5; }
 >name : string
 >"def" : "def"
 >b : number
diff --git a/tests/baselines/reference/typeArgInferenceWithNull.types b/tests/baselines/reference/typeArgInferenceWithNull.types
index 52f656f689024..d0cf45da42b33 100644
--- a/tests/baselines/reference/typeArgInferenceWithNull.types
+++ b/tests/baselines/reference/typeArgInferenceWithNull.types
@@ -44,9 +44,9 @@ fn6({ x: null }, y => { }, { x: "" }); // y has type { x: any }, but ideally wou
 >{ x: null } : { x: null; }
 >x : null
 >null : null
->y => { } : (y: { x: string; }) => void
->y : { x: string; }
->{ x: "" } : { x: string; }
+>y => { } : (y: { x: ""; }) => void
+>y : { x: ""; }
+>{ x: "" } : { x: ""; }
 >x : string
 >"" : ""
 
diff --git a/tests/baselines/reference/typeArgumentInference.errors.txt b/tests/baselines/reference/typeArgumentInference.errors.txt
index cfed6cc640bda..6ed03b4e48da5 100644
--- a/tests/baselines/reference/typeArgumentInference.errors.txt
+++ b/tests/baselines/reference/typeArgumentInference.errors.txt
@@ -1,6 +1,6 @@
 tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts(68,29): error TS2345: Argument of type '0' is not assignable to parameter of type '""'.
 tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts(83,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'a9e' has type '{ x: number; z: Date; y?: undefined; } | { x: number; y: string; z?: undefined; }' at tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts 81:4, but here has type '{}'.
-tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts(84,74): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts(84,74): error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
 
 
@@ -94,7 +94,7 @@ tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts(84,74
 !!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'a9e' has type '{ x: number; z: Date; y?: undefined; } | { x: number; y: string; z?: undefined; }' at tests/cases/conformance/expressions/functionCalls/typeArgumentInference.ts 81:4, but here has type '{}'.
     var a9f = someGenerics9<A92>(undefined, { x: 6, z: new Date() }, { x: 6, y: '' });
                                                                              ~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+!!! error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
 !!! error TS2345:   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
     var a9f: A92;
     
diff --git a/tests/baselines/reference/typeArgumentInference.types b/tests/baselines/reference/typeArgumentInference.types
index 1f39235ae36ff..a7b94897f1640 100644
--- a/tests/baselines/reference/typeArgumentInference.types
+++ b/tests/baselines/reference/typeArgumentInference.types
@@ -154,7 +154,7 @@ someGenerics3<Date>(() => undefined);
 someGenerics3<number>(() => 3);
 >someGenerics3<number>(() => 3) : void
 >someGenerics3 : <T>(producer: () => T) => void
->() => 3 : () => number
+>() => 3 : () => 3
 >3 : 3
 
 // 2 parameter generic call with argument 1 of type parameter type and argument 2 of function type whose parameter is of type parameter type
@@ -387,10 +387,10 @@ var a9b = someGenerics9<{ a?: number; b?: string; }>({ a: 0 }, { b: '' }, null);
 >someGenerics9 : <T>(a: T, b: T, c: T) => T
 >a : number
 >b : string
->{ a: 0 } : { a: number; }
+>{ a: 0 } : { a: 0; }
 >a : number
 >0 : 0
->{ b: '' } : { b: string; }
+>{ b: '' } : { b: ""; }
 >b : string
 >'' : ""
 >null : null
@@ -425,13 +425,13 @@ var a9e = someGenerics9(undefined, { x: 6, z: new Date() }, { x: 6, y: '' });
 >someGenerics9(undefined, { x: 6, z: new Date() }, { x: 6, y: '' }) : { x: number; z: Date; y?: undefined; } | { x: number; y: string; z?: undefined; }
 >someGenerics9 : <T>(a: T, b: T, c: T) => T
 >undefined : undefined
->{ x: 6, z: new Date() } : { x: number; z: Date; }
+>{ x: 6, z: new Date() } : { x: 6; z: Date; }
 >x : number
 >6 : 6
 >z : Date
 >new Date() : Date
 >Date : DateConstructor
->{ x: 6, y: '' } : { x: number; y: string; }
+>{ x: 6, y: '' } : { x: 6; y: ""; }
 >x : number
 >6 : 6
 >y : string
@@ -467,13 +467,13 @@ var a9d = someGenerics9({ x: 3 }, { x: 6 }, { x: 6 });
 >a9d : { x: number; }
 >someGenerics9({ x: 3 }, { x: 6 }, { x: 6 }) : { x: number; }
 >someGenerics9 : <T>(a: T, b: T, c: T) => T
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
 
diff --git a/tests/baselines/reference/typeArgumentInferenceConstructSignatures.errors.txt b/tests/baselines/reference/typeArgumentInferenceConstructSignatures.errors.txt
index ef0c93f20cda5..1810f8acf4126 100644
--- a/tests/baselines/reference/typeArgumentInferenceConstructSignatures.errors.txt
+++ b/tests/baselines/reference/typeArgumentInferenceConstructSignatures.errors.txt
@@ -14,7 +14,7 @@ tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstruct
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts(120,51): error TS2304: Cannot find name 'window'.
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts(121,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'a9e' has type '{ x: number; z: any; y?: undefined; } | { x: number; y: string; z?: undefined; }' at tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts 119:4, but here has type '{}'.
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts(122,56): error TS2304: Cannot find name 'window'.
-tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts(122,74): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstructSignatures.ts(122,74): error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
 
 
@@ -168,7 +168,7 @@ tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceConstruct
                                                            ~~~~~~
 !!! error TS2304: Cannot find name 'window'.
                                                                              ~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+!!! error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
 !!! error TS2345:   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
     var a9f: A92;
     
diff --git a/tests/baselines/reference/typeArgumentInferenceConstructSignatures.types b/tests/baselines/reference/typeArgumentInferenceConstructSignatures.types
index 04dae1dafa758..6eeabe7393589 100644
--- a/tests/baselines/reference/typeArgumentInferenceConstructSignatures.types
+++ b/tests/baselines/reference/typeArgumentInferenceConstructSignatures.types
@@ -196,7 +196,7 @@ new someGenerics3<Window>(() => undefined);
 new someGenerics3<number>(() => 3);
 >new someGenerics3<number>(() => 3) : any
 >someGenerics3 : someGenerics3
->() => 3 : () => number
+>() => 3 : () => 3
 >3 : 3
 
 // 2 parameter generic call with argument 1 of type parameter type and argument 2 of function type whose parameter is of type parameter type
@@ -490,10 +490,10 @@ var a9b = new someGenerics9<{ a?: number; b?: string; }>({ a: 0 }, { b: '' }, nu
 >someGenerics9 : someGenerics9
 >a : number
 >b : string
->{ a: 0 } : { a: number; }
+>{ a: 0 } : { a: 0; }
 >a : number
 >0 : 0
->{ b: '' } : { b: string; }
+>{ b: '' } : { b: ""; }
 >b : string
 >'' : ""
 >null : null
@@ -528,12 +528,12 @@ var a9e = new someGenerics9(undefined, { x: 6, z: window }, { x: 6, y: '' });
 >new someGenerics9(undefined, { x: 6, z: window }, { x: 6, y: '' }) : { x: number; z: any; y?: undefined; } | { x: number; y: string; z?: undefined; }
 >someGenerics9 : someGenerics9
 >undefined : undefined
->{ x: 6, z: window } : { x: number; z: any; }
+>{ x: 6, z: window } : { x: 6; z: any; }
 >x : number
 >6 : 6
 >z : any
 >window : any
->{ x: 6, y: '' } : { x: number; y: string; }
+>{ x: 6, y: '' } : { x: 6; y: ""; }
 >x : number
 >6 : 6
 >y : string
@@ -568,13 +568,13 @@ var a9d = new someGenerics9({ x: 3 }, { x: 6 }, { x: 6 });
 >a9d : { x: number; }
 >new someGenerics9({ x: 3 }, { x: 6 }, { x: 6 }) : { x: number; }
 >someGenerics9 : someGenerics9
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
 
diff --git a/tests/baselines/reference/typeArgumentInferenceWithConstraints.errors.txt b/tests/baselines/reference/typeArgumentInferenceWithConstraints.errors.txt
index 2b3053906896d..fdf990b43c39a 100644
--- a/tests/baselines/reference/typeArgumentInferenceWithConstraints.errors.txt
+++ b/tests/baselines/reference/typeArgumentInferenceWithConstraints.errors.txt
@@ -19,7 +19,7 @@ tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConst
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts(87,47): error TS2304: Cannot find name 'window'.
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts(88,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'a9e' has type '{ x: number; z: any; y?: undefined; } | { x: number; y: string; z?: undefined; }' at tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts 86:4, but here has type '{}'.
 tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts(89,52): error TS2304: Cannot find name 'window'.
-tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts(89,70): error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConstraints.ts(89,70): error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
 
 
@@ -150,7 +150,7 @@ tests/cases/conformance/expressions/functionCalls/typeArgumentInferenceWithConst
                                                        ~~~~~~
 !!! error TS2304: Cannot find name 'window'.
                                                                          ~~~~~
-!!! error TS2345: Argument of type '{ x: number; y: string; }' is not assignable to parameter of type 'A92'.
+!!! error TS2345: Argument of type '{ x: 6; y: string; }' is not assignable to parameter of type 'A92'.
 !!! error TS2345:   Object literal may only specify known properties, and 'y' does not exist in type 'A92'.
     var a9f: A92;
     
diff --git a/tests/baselines/reference/typeArgumentInferenceWithConstraints.types b/tests/baselines/reference/typeArgumentInferenceWithConstraints.types
index 4ca65f02b02b8..b6ea681a8d60c 100644
--- a/tests/baselines/reference/typeArgumentInferenceWithConstraints.types
+++ b/tests/baselines/reference/typeArgumentInferenceWithConstraints.types
@@ -168,7 +168,7 @@ someGenerics3<Window>(() => undefined);
 someGenerics3<number>(() => 3); // Error
 >someGenerics3<number>(() => 3) : void
 >someGenerics3 : <T extends any>(producer: () => T) => void
->() => 3 : () => number
+>() => 3 : () => 3
 >3 : 3
 
 // 2 parameter generic call with argument 1 of type parameter type and argument 2 of function type whose parameter is of type parameter type
@@ -430,10 +430,10 @@ var a9b = someGenerics9<{ a?: number; b?: string; }>({ a: 0 }, { b: '' }, null);
 >someGenerics9 : <T extends any>(a: T, b: T, c: T) => T
 >a : number
 >b : string
->{ a: 0 } : { a: number; }
+>{ a: 0 } : { a: 0; }
 >a : number
 >0 : 0
->{ b: '' } : { b: string; }
+>{ b: '' } : { b: ""; }
 >b : string
 >'' : ""
 >null : null
@@ -468,12 +468,12 @@ var a9e = someGenerics9(undefined, { x: 6, z: window }, { x: 6, y: '' });
 >someGenerics9(undefined, { x: 6, z: window }, { x: 6, y: '' }) : { x: number; z: any; y?: undefined; } | { x: number; y: string; z?: undefined; }
 >someGenerics9 : <T extends any>(a: T, b: T, c: T) => T
 >undefined : undefined
->{ x: 6, z: window } : { x: number; z: any; }
+>{ x: 6, z: window } : { x: 6; z: any; }
 >x : number
 >6 : 6
 >z : any
 >window : any
->{ x: 6, y: '' } : { x: number; y: string; }
+>{ x: 6, y: '' } : { x: 6; y: ""; }
 >x : number
 >6 : 6
 >y : string
@@ -508,13 +508,13 @@ var a9d = someGenerics9({ x: 3 }, { x: 6 }, { x: 6 });
 >a9d : { x: number; }
 >someGenerics9({ x: 3 }, { x: 6 }, { x: 6 }) : { x: number; }
 >someGenerics9 : <T extends any>(a: T, b: T, c: T) => T
->{ x: 3 } : { x: number; }
+>{ x: 3 } : { x: 3; }
 >x : number
 >3 : 3
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
->{ x: 6 } : { x: number; }
+>{ x: 6 } : { x: 6; }
 >x : number
 >6 : 6
 
diff --git a/tests/baselines/reference/typeGuardsAsAssertions.types b/tests/baselines/reference/typeGuardsAsAssertions.types
index bd11b4a6f2057..3817e9416ec61 100644
--- a/tests/baselines/reference/typeGuardsAsAssertions.types
+++ b/tests/baselines/reference/typeGuardsAsAssertions.types
@@ -24,7 +24,7 @@ export interface Some<a> { readonly some: a; }
 export const none : None = { none: '' };
 >none : None
 >None : None
->{ none: '' } : { none: string; }
+>{ none: '' } : { none: ""; }
 >none : string
 >'' : ""
 
diff --git a/tests/baselines/reference/typeGuardsOnClassProperty.types b/tests/baselines/reference/typeGuardsOnClassProperty.types
index f4c3542344f2f..c5bd40ad38516 100644
--- a/tests/baselines/reference/typeGuardsOnClassProperty.types
+++ b/tests/baselines/reference/typeGuardsOnClassProperty.types
@@ -67,7 +67,7 @@ var o: {
 >prop2 : string | boolean
 
 } = {
->{        prop1: "string" ,        prop2: true    } : { prop1: string; prop2: true; }
+>{        prop1: "string" ,        prop2: true    } : { prop1: "string"; prop2: true; }
 
         prop1: "string" ,
 >prop1 : string
diff --git a/tests/baselines/reference/typeInferenceFBoundedTypeParams.types b/tests/baselines/reference/typeInferenceFBoundedTypeParams.types
index a6d0a51dd45db..cd3d11d123922 100644
--- a/tests/baselines/reference/typeInferenceFBoundedTypeParams.types
+++ b/tests/baselines/reference/typeInferenceFBoundedTypeParams.types
@@ -60,7 +60,7 @@ fold(
 >fold : <a, r>(values: a[], result: r, fold: (result: r, value: a) => r) => r
 
     [1, 2, 3],
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -80,7 +80,7 @@ fold(
 >result : [string, string][]
 
         ["", ""]
->["", ""] : [string, string]
+>["", ""] : ["", ""]
 >"" : ""
 >"" : ""
 
diff --git a/tests/baselines/reference/typeInferenceWithExcessProperties.types b/tests/baselines/reference/typeInferenceWithExcessProperties.types
index af3e1baae90ab..eccc53840d6d6 100644
--- a/tests/baselines/reference/typeInferenceWithExcessProperties.types
+++ b/tests/baselines/reference/typeInferenceWithExcessProperties.types
@@ -22,9 +22,9 @@ function parrot<T extends Named>(obj: T): T {
 
 
 parrot({
->parrot({    name: "TypeScript",}) : { name: string; }
+>parrot({    name: "TypeScript",}) : { name: "TypeScript"; }
 >parrot : <T extends Named>(obj: T) => T
->{    name: "TypeScript",} : { name: string; }
+>{    name: "TypeScript",} : { name: "TypeScript"; }
 
     name: "TypeScript",
 >name : string
@@ -33,9 +33,9 @@ parrot({
 });
 
 parrot({
->parrot({    name: "TypeScript",    age: 5,}) : { name: string; age: number; }
+>parrot({    name: "TypeScript",    age: 5,}) : { name: "TypeScript"; age: number; }
 >parrot : <T extends Named>(obj: T) => T
->{    name: "TypeScript",    age: 5,} : { name: string; age: number; }
+>{    name: "TypeScript",    age: 5,} : { name: "TypeScript"; age: 5; }
 
     name: "TypeScript",
 >name : string
@@ -48,9 +48,9 @@ parrot({
 });
 
 parrot({
->parrot({    name: "TypeScript",    age: function () { },}) : { name: string; age: () => void; }
+>parrot({    name: "TypeScript",    age: function () { },}) : { name: "TypeScript"; age: () => void; }
 >parrot : <T extends Named>(obj: T) => T
->{    name: "TypeScript",    age: function () { },} : { name: string; age: () => void; }
+>{    name: "TypeScript",    age: function () { },} : { name: "TypeScript"; age: () => void; }
 
     name: "TypeScript",
 >name : string
@@ -63,9 +63,9 @@ parrot({
 });
 
 parrot({
->parrot({    name: "TypeScript",    sayHello() {    },}) : { name: string; sayHello(): void; }
+>parrot({    name: "TypeScript",    sayHello() {    },}) : { name: "TypeScript"; sayHello(): void; }
 >parrot : <T extends Named>(obj: T) => T
->{    name: "TypeScript",    sayHello() {    },} : { name: string; sayHello(): void; }
+>{    name: "TypeScript",    sayHello() {    },} : { name: "TypeScript"; sayHello(): void; }
 
     name: "TypeScript",
 >name : string
diff --git a/tests/baselines/reference/typeInferenceWithTupleType.types b/tests/baselines/reference/typeInferenceWithTupleType.types
index a7f8bff679815..e48d9cdcf0c33 100644
--- a/tests/baselines/reference/typeInferenceWithTupleType.types
+++ b/tests/baselines/reference/typeInferenceWithTupleType.types
@@ -102,10 +102,10 @@ var zipResult = zip(["foo", "bar"], [5, 6]);
 >zipResult : [[string, number]]
 >zip(["foo", "bar"], [5, 6]) : [[string, number]]
 >zip : <T, U>(array1: T[], array2: U[]) => [[T, U]]
->["foo", "bar"] : string[]
+>["foo", "bar"] : ("foo" | "bar")[]
 >"foo" : "foo"
 >"bar" : "bar"
->[5, 6] : number[]
+>[5, 6] : (5 | 6)[]
 >5 : 5
 >6 : 6
 
diff --git a/tests/baselines/reference/typeMatch2.errors.txt b/tests/baselines/reference/typeMatch2.errors.txt
index 19ac6def2a9e7..c4caa329face7 100644
--- a/tests/baselines/reference/typeMatch2.errors.txt
+++ b/tests/baselines/reference/typeMatch2.errors.txt
@@ -1,10 +1,10 @@
 tests/cases/compiler/typeMatch2.ts(3,2): error TS2322: Type '{}' is not assignable to type '{ x: number; y: number; }'.
   Property 'x' is missing in type '{}'.
-tests/cases/compiler/typeMatch2.ts(4,5): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }'.
-  Property 'y' is missing in type '{ x: number; }'.
-tests/cases/compiler/typeMatch2.ts(5,20): error TS2322: Type '{ x: number; y: number; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+tests/cases/compiler/typeMatch2.ts(4,5): error TS2322: Type '{ x: 1; }' is not assignable to type '{ x: number; y: number; }'.
+  Property 'y' is missing in type '{ x: 1; }'.
+tests/cases/compiler/typeMatch2.ts(5,20): error TS2322: Type '{ x: 1; y: 2; z: number; }' is not assignable to type '{ x: number; y: number; }'.
   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
-tests/cases/compiler/typeMatch2.ts(6,17): error TS2322: Type '{ x: number; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+tests/cases/compiler/typeMatch2.ts(6,17): error TS2322: Type '{ x: 1; z: number; }' is not assignable to type '{ x: number; y: number; }'.
   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
 tests/cases/compiler/typeMatch2.ts(18,5): error TS2322: Type 'Animal[]' is not assignable to type 'Giraffe[]'.
   Type 'Animal' is not assignable to type 'Giraffe'.
@@ -12,10 +12,10 @@ tests/cases/compiler/typeMatch2.ts(18,5): error TS2322: Type 'Animal[]' is not a
 tests/cases/compiler/typeMatch2.ts(22,5): error TS2322: Type '{ f1: number; f2: Animal[]; }' is not assignable to type '{ f1: number; f2: Giraffe[]; }'.
   Types of property 'f2' are incompatible.
     Type 'Animal[]' is not assignable to type 'Giraffe[]'.
-tests/cases/compiler/typeMatch2.ts(34,26): error TS2322: Type '{ x: number; y: any; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+tests/cases/compiler/typeMatch2.ts(34,26): error TS2322: Type '{ x: 1; y: any; z: number; }' is not assignable to type '{ x: number; y: number; }'.
   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
-tests/cases/compiler/typeMatch2.ts(35,5): error TS2322: Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }'.
-  Property 'y' is missing in type '{ x: number; }'.
+tests/cases/compiler/typeMatch2.ts(35,5): error TS2322: Type '{ x: 1; }' is not assignable to type '{ x: number; y: number; }'.
+  Property 'y' is missing in type '{ x: 1; }'.
 
 
 ==== tests/cases/compiler/typeMatch2.ts (8 errors) ====
@@ -27,15 +27,15 @@ tests/cases/compiler/typeMatch2.ts(35,5): error TS2322: Type '{ x: number; }' is
 !!! error TS2322:   Property 'x' is missing in type '{}'.
         a = { x: 1 }; // error
         ~
-!!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }'.
-!!! error TS2322:   Property 'y' is missing in type '{ x: number; }'.
+!!! error TS2322: Type '{ x: 1; }' is not assignable to type '{ x: number; y: number; }'.
+!!! error TS2322:   Property 'y' is missing in type '{ x: 1; }'.
     	a = { x: 1, y: 2, z: 3 };
     	                  ~~~~
-!!! error TS2322: Type '{ x: number; y: number; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+!!! error TS2322: Type '{ x: 1; y: 2; z: number; }' is not assignable to type '{ x: number; y: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
         a = { x: 1, z: 3 };  // error
                     ~~~~
-!!! error TS2322: Type '{ x: number; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+!!! error TS2322: Type '{ x: 1; z: number; }' is not assignable to type '{ x: number; y: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
     }
     
@@ -74,12 +74,12 @@ tests/cases/compiler/typeMatch2.ts(35,5): error TS2322: Type '{ x: number; }' is
         a = { x: 1, y: _any }; 
         a = { x: 1, y: _any, z:1 }; 
                              ~~~
-!!! error TS2322: Type '{ x: number; y: any; z: number; }' is not assignable to type '{ x: number; y: number; }'.
+!!! error TS2322: Type '{ x: 1; y: any; z: number; }' is not assignable to type '{ x: number; y: number; }'.
 !!! error TS2322:   Object literal may only specify known properties, and 'z' does not exist in type '{ x: number; y: number; }'.
         a = { x: 1 }; // error
         ~
-!!! error TS2322: Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }'.
-!!! error TS2322:   Property 'y' is missing in type '{ x: number; }'.
+!!! error TS2322: Type '{ x: 1; }' is not assignable to type '{ x: number; y: number; }'.
+!!! error TS2322:   Property 'y' is missing in type '{ x: 1; }'.
         var mf = function m(n) { return false; };
         var zf = function z(n: number) { return true; };
         mf=zf;
diff --git a/tests/baselines/reference/typeMatch2.types b/tests/baselines/reference/typeMatch2.types
index 152e68bfcb7b7..48c9893b9aea8 100644
--- a/tests/baselines/reference/typeMatch2.types
+++ b/tests/baselines/reference/typeMatch2.types
@@ -16,16 +16,16 @@ function f1() {
 >{} : {}
 
     a = { x: 1 }; // error
->a = { x: 1 } : { x: number; }
+>a = { x: 1 } : { x: 1; }
 >a : { x: number; y: number; }
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
 	a = { x: 1, y: 2, z: 3 };
->a = { x: 1, y: 2, z: 3 } : { x: number; y: number; z: number; }
+>a = { x: 1, y: 2, z: 3 } : { x: 1; y: 2; z: number; }
 >a : { x: number; y: number; }
->{ x: 1, y: 2, z: 3 } : { x: number; y: number; z: number; }
+>{ x: 1, y: 2, z: 3 } : { x: 1; y: 2; z: number; }
 >x : number
 >1 : 1
 >y : number
@@ -34,9 +34,9 @@ function f1() {
 >3 : 3
 
     a = { x: 1, z: 3 };  // error
->a = { x: 1, z: 3 } : { x: number; z: number; }
+>a = { x: 1, z: 3 } : { x: 1; z: number; }
 >a : { x: number; y: number; }
->{ x: 1, z: 3 } : { x: number; z: number; }
+>{ x: 1, z: 3 } : { x: 1; z: number; }
 >x : number
 >1 : 1
 >z : number
@@ -146,36 +146,36 @@ function f4() {
 >1 : 1
 
     a = { x: 1, y: null }; 
->a = { x: 1, y: null } : { x: number; y: null; }
+>a = { x: 1, y: null } : { x: 1; y: null; }
 >a : { x: number; y: number; }
->{ x: 1, y: null } : { x: number; y: null; }
+>{ x: 1, y: null } : { x: 1; y: null; }
 >x : number
 >1 : 1
 >y : null
 >null : null
 
     a = { x: 1, y: undefined }; 
->a = { x: 1, y: undefined } : { x: number; y: undefined; }
+>a = { x: 1, y: undefined } : { x: 1; y: undefined; }
 >a : { x: number; y: number; }
->{ x: 1, y: undefined } : { x: number; y: undefined; }
+>{ x: 1, y: undefined } : { x: 1; y: undefined; }
 >x : number
 >1 : 1
 >y : undefined
 >undefined : undefined
 
     a = { x: 1, y: _any }; 
->a = { x: 1, y: _any } : { x: number; y: any; }
+>a = { x: 1, y: _any } : { x: 1; y: any; }
 >a : { x: number; y: number; }
->{ x: 1, y: _any } : { x: number; y: any; }
+>{ x: 1, y: _any } : { x: 1; y: any; }
 >x : number
 >1 : 1
 >y : any
 >_any : any
 
     a = { x: 1, y: _any, z:1 }; 
->a = { x: 1, y: _any, z:1 } : { x: number; y: any; z: number; }
+>a = { x: 1, y: _any, z:1 } : { x: 1; y: any; z: number; }
 >a : { x: number; y: number; }
->{ x: 1, y: _any, z:1 } : { x: number; y: any; z: number; }
+>{ x: 1, y: _any, z:1 } : { x: 1; y: any; z: number; }
 >x : number
 >1 : 1
 >y : any
@@ -184,9 +184,9 @@ function f4() {
 >1 : 1
 
     a = { x: 1 }; // error
->a = { x: 1 } : { x: number; }
+>a = { x: 1 } : { x: 1; }
 >a : { x: number; y: number; }
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
 
diff --git a/tests/baselines/reference/typeParameterAsTypeParameterConstraint.types b/tests/baselines/reference/typeParameterAsTypeParameterConstraint.types
index 885b655b74952..a9c17454832a5 100644
--- a/tests/baselines/reference/typeParameterAsTypeParameterConstraint.types
+++ b/tests/baselines/reference/typeParameterAsTypeParameterConstraint.types
@@ -60,10 +60,10 @@ var r3 = foo({ x: 1 }, { x: 2, y: 3 });
 >r3 : { x: number; y: number; }
 >foo({ x: 1 }, { x: 2, y: 3 }) : { x: number; y: number; }
 >foo : <T, U extends T>(x: T, y: U) => U
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
->{ x: 2, y: 3 } : { x: number; y: number; }
+>{ x: 2, y: 3 } : { x: 2; y: 3; }
 >x : number
 >2 : 2
 >y : number
@@ -91,7 +91,7 @@ foo2({}, { length: 2 });
 >foo2({}, { length: 2 }) : { length: number; }
 >foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
 >{} : {}
->{ length: 2 } : { length: number; }
+>{ length: 2 } : { length: 2; }
 >length : number
 >2 : 2
 
@@ -99,7 +99,7 @@ foo2(1, { width: 3, length: 2 });
 >foo2(1, { width: 3, length: 2 }) : { width: number; length: number; }
 >foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
 >1 : 1
->{ width: 3, length: 2 } : { width: number; length: number; }
+>{ width: 3, length: 2 } : { width: 3; length: 2; }
 >width : number
 >3 : 3
 >length : number
@@ -115,6 +115,6 @@ foo2(1, ['']);
 >foo2(1, ['']) : string[]
 >foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
 >1 : 1
->[''] : string[]
+>[''] : ""[]
 >'' : ""
 
diff --git a/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively.types b/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively.types
index 8e5f04507bbdf..6890ebb6a4997 100644
--- a/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively.types
+++ b/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively.types
@@ -54,15 +54,15 @@ foo(1, 2, 3);
 foo({ x: 1 }, { x: 1, y: '' }, { x: 2, y: '', z: true });
 >foo({ x: 1 }, { x: 1, y: '' }, { x: 2, y: '', z: true }) : { x: number; y: string; z: boolean; }
 >foo : <T, U, V>(x: T, y: U, z: V) => V
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
->{ x: 1, y: '' } : { x: number; y: string; }
+>{ x: 1, y: '' } : { x: 1; y: ""; }
 >x : number
 >1 : 1
 >y : string
 >'' : ""
->{ x: 2, y: '', z: true } : { x: number; y: string; z: true; }
+>{ x: 2, y: '', z: true } : { x: 2; y: ""; z: true; }
 >x : number
 >2 : 2
 >y : string
@@ -82,7 +82,7 @@ foo(a, b, { foo: 1, bar: '', hm: true });
 >foo : <T, U, V>(x: T, y: U, z: V) => V
 >a : A
 >b : B
->{ foo: 1, bar: '', hm: true } : { foo: number; bar: string; hm: true; }
+>{ foo: 1, bar: '', hm: true } : { foo: 1; bar: ""; hm: true; }
 >foo : number
 >1 : 1
 >bar : string
@@ -135,7 +135,7 @@ foo(b, b, { foo: 1, bar: '', hm: '' });
 >foo : <T, U, V>(x: T, y: U, z: V) => V
 >b : B
 >b : B
->{ foo: 1, bar: '', hm: '' } : { foo: number; bar: string; hm: string; }
+>{ foo: 1, bar: '', hm: '' } : { foo: 1; bar: ""; hm: ""; }
 >foo : number
 >1 : 1
 >bar : string
diff --git a/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively2.types b/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively2.types
index 80e800cb1e052..a800078077321 100644
--- a/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively2.types
+++ b/tests/baselines/reference/typeParameterAsTypeParameterConstraintTransitively2.types
@@ -54,15 +54,15 @@ foo(1, 2, '');
 foo({ x: 1 }, { x: 1, y: '' }, { x: 2, y: 2, z: true });
 >foo({ x: 1 }, { x: 1, y: '' }, { x: 2, y: 2, z: true }) : { x: number; y: number; z: boolean; }
 >foo : <T, U, V>(x: T, y: U, z: V) => V
->{ x: 1 } : { x: number; }
+>{ x: 1 } : { x: 1; }
 >x : number
 >1 : 1
->{ x: 1, y: '' } : { x: number; y: string; }
+>{ x: 1, y: '' } : { x: 1; y: ""; }
 >x : number
 >1 : 1
 >y : string
 >'' : ""
->{ x: 2, y: 2, z: true } : { x: number; y: number; z: true; }
+>{ x: 2, y: 2, z: true } : { x: 2; y: 2; z: true; }
 >x : number
 >2 : 2
 >y : number
@@ -81,7 +81,7 @@ foo(a, { foo: 1, bar: '', hm: true }, b);
 >foo(a, { foo: 1, bar: '', hm: true }, b) : B
 >foo : <T, U, V>(x: T, y: U, z: V) => V
 >a : A
->{ foo: 1, bar: '', hm: true } : { foo: number; bar: string; hm: true; }
+>{ foo: 1, bar: '', hm: true } : { foo: 1; bar: ""; hm: true; }
 >foo : number
 >1 : 1
 >bar : string
diff --git a/tests/baselines/reference/typeVal.types b/tests/baselines/reference/typeVal.types
index 26944f231b23a..fa7896e1fcb81 100644
--- a/tests/baselines/reference/typeVal.types
+++ b/tests/baselines/reference/typeVal.types
@@ -9,7 +9,7 @@ interface I {
 var I:I = { I: 3};
 >I : I
 >I : I
->{ I: 3} : { I: number; }
+>{ I: 3} : { I: 3; }
 >I : number
 >3 : 3
 
diff --git a/tests/baselines/reference/typeofInterface.types b/tests/baselines/reference/typeofInterface.types
index fad9b02900444..b28fec874f534 100644
--- a/tests/baselines/reference/typeofInterface.types
+++ b/tests/baselines/reference/typeofInterface.types
@@ -23,7 +23,7 @@ var j: typeof k.foo = { a: "hello" };
 >k.foo : { a: string; }
 >k : I
 >foo : { a: string; }
->{ a: "hello" } : { a: string; }
+>{ a: "hello" } : { a: "hello"; }
 >a : string
 >"hello" : "hello"
 
diff --git a/tests/baselines/reference/typeofOperatorWithNumberType.types b/tests/baselines/reference/typeofOperatorWithNumberType.types
index 918fe2dcc3d4f..cf34224dc0a01 100644
--- a/tests/baselines/reference/typeofOperatorWithNumberType.types
+++ b/tests/baselines/reference/typeofOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/typeofOperatorWithStringType.types b/tests/baselines/reference/typeofOperatorWithStringType.types
index ca4f445c9e613..ee0898dc15ede 100644
--- a/tests/baselines/reference/typeofOperatorWithStringType.types
+++ b/tests/baselines/reference/typeofOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/types.asyncGenerators.esnext.1.types b/tests/baselines/reference/types.asyncGenerators.esnext.1.types
index 6e29e9cc95cab..6be418c07b976 100644
--- a/tests/baselines/reference/types.asyncGenerators.esnext.1.types
+++ b/tests/baselines/reference/types.asyncGenerators.esnext.1.types
@@ -76,7 +76,7 @@ async function * inferReturnType8() {
 const assignability1: () => AsyncIterableIterator<number> = async function * () {
 >assignability1 : () => AsyncIterableIterator<number>
 >AsyncIterableIterator : AsyncIterableIterator<T>
->async function * () {    yield 1;} : () => AsyncIterableIterator<number>
+>async function * () {    yield 1;} : () => AsyncIterableIterator<1>
 
     yield 1;
 >yield 1 : any
@@ -141,7 +141,7 @@ const assignability5: () => AsyncIterableIterator<number> = async function * ()
 const assignability6: () => AsyncIterable<number> = async function * () {
 >assignability6 : () => AsyncIterable<number>
 >AsyncIterable : AsyncIterable<T>
->async function * () {    yield 1;} : () => AsyncIterableIterator<number>
+>async function * () {    yield 1;} : () => AsyncIterableIterator<1>
 
     yield 1;
 >yield 1 : any
@@ -206,7 +206,7 @@ const assignability10: () => AsyncIterable<number> = async function * () {
 const assignability11: () => AsyncIterator<number> = async function * () {
 >assignability11 : () => AsyncIterator<number>
 >AsyncIterator : AsyncIterator<T>
->async function * () {    yield 1;} : () => AsyncIterableIterator<number>
+>async function * () {    yield 1;} : () => AsyncIterableIterator<1>
 
     yield 1;
 >yield 1 : any
diff --git a/tests/baselines/reference/types.asyncGenerators.esnext.2.types b/tests/baselines/reference/types.asyncGenerators.esnext.2.types
index c9f8e9216c4a8..6ba5bd2776c27 100644
--- a/tests/baselines/reference/types.asyncGenerators.esnext.2.types
+++ b/tests/baselines/reference/types.asyncGenerators.esnext.2.types
@@ -23,7 +23,7 @@ async function * inferReturnType3() {
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 }
diff --git a/tests/baselines/reference/underscoreTest1.types b/tests/baselines/reference/underscoreTest1.types
index 4ab097e3316c9..f841321c6f6bc 100644
--- a/tests/baselines/reference/underscoreTest1.types
+++ b/tests/baselines/reference/underscoreTest1.types
@@ -13,7 +13,7 @@ _.each([1, 2, 3], (num) => alert(num.toString()));
 >_.each : { <T>(list: T[], iterator: Iterator_<T, void>, context?: any): void; <T>(list: Dictionary<T>, iterator: Iterator_<T, void>, context?: any): void; }
 >_ : Underscore.Static
 >each : { <T>(list: T[], iterator: Iterator_<T, void>, context?: any): void; <T>(list: Dictionary<T>, iterator: Iterator_<T, void>, context?: any): void; }
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -31,7 +31,7 @@ _.each({ one: 1, two: 2, three: 3 }, (value: number, key?: string) => alert(valu
 >_.each : { <T>(list: T[], iterator: Iterator_<T, void>, context?: any): void; <T>(list: Dictionary<T>, iterator: Iterator_<T, void>, context?: any): void; }
 >_ : Underscore.Static
 >each : { <T>(list: T[], iterator: Iterator_<T, void>, context?: any): void; <T>(list: Dictionary<T>, iterator: Iterator_<T, void>, context?: any): void; }
->{ one: 1, two: 2, three: 3 } : { one: number; two: number; three: number; }
+>{ one: 1, two: 2, three: 3 } : { one: 1; two: 2; three: 3; }
 >one : number
 >1 : 1
 >two : number
@@ -53,7 +53,7 @@ _.map([1, 2, 3], (num) => num * 3);
 >_.map : { <T, U>(list: T[], iterator: Iterator_<T, U>, context?: any): U[]; <T, U>(list: Dictionary<T>, iterator: Iterator_<T, U>, context?: any): U[]; }
 >_ : Underscore.Static
 >map : { <T, U>(list: T[], iterator: Iterator_<T, U>, context?: any): U[]; <T, U>(list: Dictionary<T>, iterator: Iterator_<T, U>, context?: any): U[]; }
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -68,7 +68,7 @@ _.map({ one: 1, two: 2, three: 3 }, (value: number, key?: string) => value * 3);
 >_.map : { <T, U>(list: T[], iterator: Iterator_<T, U>, context?: any): U[]; <T, U>(list: Dictionary<T>, iterator: Iterator_<T, U>, context?: any): U[]; }
 >_ : Underscore.Static
 >map : { <T, U>(list: T[], iterator: Iterator_<T, U>, context?: any): U[]; <T, U>(list: Dictionary<T>, iterator: Iterator_<T, U>, context?: any): U[]; }
->{ one: 1, two: 2, three: 3 } : { one: number; two: number; three: number; }
+>{ one: 1, two: 2, three: 3 } : { one: 1; two: 2; three: 3; }
 >one : number
 >1 : 1
 >two : number
@@ -88,7 +88,7 @@ var sum = _.reduce([1, 2, 3], (memo, num) => memo + num, 0);
 >_.reduce : { <T>(list: T[], iterator: Reducer<T, T>, initialValue?: T, context?: any): T; <T, U>(list: T[], iterator: Reducer<T, U>, initialValue: U, context?: any): U; <T>(list: Dictionary<T>, iterator: Reducer<T, T>, initialValue?: T, context?: any): T; <T, U>(list: Dictionary<T>, iterator: Reducer<T, U>, initialValue: U, context?: any): U; }
 >_ : Underscore.Static
 >reduce : { <T>(list: T[], iterator: Reducer<T, T>, initialValue?: T, context?: any): T; <T, U>(list: T[], iterator: Reducer<T, U>, initialValue: U, context?: any): U; <T>(list: Dictionary<T>, iterator: Reducer<T, T>, initialValue?: T, context?: any): T; <T, U>(list: Dictionary<T>, iterator: Reducer<T, U>, initialValue: U, context?: any): U; }
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -136,7 +136,7 @@ var even = _.find([1, 2, 3, 4, 5, 6], (num) => num % 2 == 0);
 >_.find : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T; }
 >_ : Underscore.Static
 >find : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T; }
->[1, 2, 3, 4, 5, 6] : number[]
+>[1, 2, 3, 4, 5, 6] : (1 | 2 | 3 | 4 | 5 | 6)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -157,7 +157,7 @@ var evens = _.filter([1, 2, 3, 4, 5, 6], (num) => num % 2 == 0);
 >_.filter : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T[]; }
 >_ : Underscore.Static
 >filter : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T[]; }
->[1, 2, 3, 4, 5, 6] : number[]
+>[1, 2, 3, 4, 5, 6] : (1 | 2 | 3 | 4 | 5 | 6)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -215,7 +215,7 @@ var odds = _.reject([1, 2, 3, 4, 5, 6], (num) => num % 2 == 0);
 >_.reject : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T[]; }
 >_ : Underscore.Static
 >reject : { <T>(list: T[], iterator: Iterator_<T, boolean>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, boolean>, context?: any): T[]; }
->[1, 2, 3, 4, 5, 6] : number[]
+>[1, 2, 3, 4, 5, 6] : (1 | 2 | 3 | 4 | 5 | 6)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -260,7 +260,7 @@ _.contains([1, 2, 3], 3);
 >_.contains : { <T>(list: T[], value: T): boolean; <T>(list: Dictionary<T>, value: T): boolean; }
 >_ : Underscore.Static
 >contains : { <T>(list: T[], value: T): boolean; <T>(list: Dictionary<T>, value: T): boolean; }
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -342,7 +342,7 @@ _.sortBy([1, 2, 3, 4, 5, 6], (num) => Math.sin(num));
 >_.sortBy : { <T>(list: T[], iterator: Iterator_<T, any>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, any>, context?: any): T[]; <T>(list: T[], propertyName: string): T[]; <T>(list: Dictionary<T>, propertyName: string): T[]; }
 >_ : Underscore.Static
 >sortBy : { <T>(list: T[], iterator: Iterator_<T, any>, context?: any): T[]; <T>(list: Dictionary<T>, iterator: Iterator_<T, any>, context?: any): T[]; <T>(list: T[], propertyName: string): T[]; <T>(list: Dictionary<T>, propertyName: string): T[]; }
->[1, 2, 3, 4, 5, 6] : number[]
+>[1, 2, 3, 4, 5, 6] : (1 | 2 | 3 | 4 | 5 | 6)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -364,7 +364,7 @@ _([1.3, 2.1, 2.4]).groupBy((e: number, i?: number, list?: number[]) => Math.floo
 >_([1.3, 2.1, 2.4]).groupBy : { (iterator?: Iterator_<number, any>, context?: any): Dictionary<number[]>; (propertyName: string): Dictionary<number[]>; }
 >_([1.3, 2.1, 2.4]) : Underscore.WrappedArray<number>
 >_ : Underscore.Static
->[1.3, 2.1, 2.4] : number[]
+>[1.3, 2.1, 2.4] : (1.3 | 2.1 | 2.4)[]
 >1.3 : 1.3
 >2.1 : 2.1
 >2.4 : 2.4
@@ -384,7 +384,7 @@ _.groupBy([1.3, 2.1, 2.4], (num: number) => Math.floor(num));
 >_.groupBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: T[], propertyName: string): Dictionary<T[]>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<T[]>; }
 >_ : Underscore.Static
 >groupBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: T[], propertyName: string): Dictionary<T[]>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<T[]>; }
->[1.3, 2.1, 2.4] : number[]
+>[1.3, 2.1, 2.4] : (1.3 | 2.1 | 2.4)[]
 >1.3 : 1.3
 >2.1 : 2.1
 >2.4 : 2.4
@@ -401,7 +401,7 @@ _.groupBy(['one', 'two', 'three'], 'length');
 >_.groupBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: T[], propertyName: string): Dictionary<T[]>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<T[]>; }
 >_ : Underscore.Static
 >groupBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<T[]>; <T>(list: T[], propertyName: string): Dictionary<T[]>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<T[]>; }
->['one', 'two', 'three'] : string[]
+>['one', 'two', 'three'] : ("one" | "two" | "three")[]
 >'one' : "one"
 >'two' : "two"
 >'three' : "three"
@@ -412,7 +412,7 @@ _.countBy([1, 2, 3, 4, 5], (num) => num % 2 == 0 ? 'even' : 'odd');
 >_.countBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<number>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<number>; <T>(list: T[], propertyName: string): Dictionary<number>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<number>; }
 >_ : Underscore.Static
 >countBy : { <T>(list: T[], iterator?: Iterator_<T, any>, context?: any): Dictionary<number>; <T>(list: Dictionary<T>, iterator?: Iterator_<T, any>, context?: any): Dictionary<number>; <T>(list: T[], propertyName: string): Dictionary<number>; <T>(list: Dictionary<T>, propertyName: string): Dictionary<number>; }
->[1, 2, 3, 4, 5] : number[]
+>[1, 2, 3, 4, 5] : (1 | 2 | 3 | 4 | 5)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -434,7 +434,7 @@ _.shuffle([1, 2, 3, 4, 5, 6]);
 >_.shuffle : { <T>(list: T[]): T[]; <T>(list: Dictionary<T>): T[]; }
 >_ : Underscore.Static
 >shuffle : { <T>(list: T[]): T[]; <T>(list: Dictionary<T>): T[]; }
->[1, 2, 3, 4, 5, 6] : number[]
+>[1, 2, 3, 4, 5, 6] : (1 | 2 | 3 | 4 | 5 | 6)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -449,7 +449,7 @@ _.size({ one: 1, two: 2, three: 3 });
 >_.size : { <T>(list: T[]): number; <T>(list: Dictionary<T>): number; }
 >_ : Underscore.Static
 >size : { <T>(list: T[]): number; <T>(list: Dictionary<T>): number; }
->{ one: 1, two: 2, three: 3 } : { one: number; two: number; three: number; }
+>{ one: 1, two: 2, three: 3 } : { one: 1; two: 2; three: 3; }
 >one : number
 >1 : 1
 >two : number
@@ -464,7 +464,7 @@ _.first([5, 4, 3, 2, 1]);
 >_.first : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
 >_ : Underscore.Static
 >first : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
->[5, 4, 3, 2, 1] : number[]
+>[5, 4, 3, 2, 1] : (1 | 2 | 3 | 4 | 5)[]
 >5 : 5
 >4 : 4
 >3 : 3
@@ -476,7 +476,7 @@ _.initial([5, 4, 3, 2, 1]);
 >_.initial : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
 >_ : Underscore.Static
 >initial : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
->[5, 4, 3, 2, 1] : number[]
+>[5, 4, 3, 2, 1] : (1 | 2 | 3 | 4 | 5)[]
 >5 : 5
 >4 : 4
 >3 : 3
@@ -488,7 +488,7 @@ _.last([5, 4, 3, 2, 1]);
 >_.last : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
 >_ : Underscore.Static
 >last : { <T>(list: T[]): T; <T>(list: T[], count: number): T[]; }
->[5, 4, 3, 2, 1] : number[]
+>[5, 4, 3, 2, 1] : (1 | 2 | 3 | 4 | 5)[]
 >5 : 5
 >4 : 4
 >3 : 3
@@ -500,7 +500,7 @@ _.rest([5, 4, 3, 2, 1]);
 >_.rest : <T>(list: T[], index?: number) => T[]
 >_ : Underscore.Static
 >rest : <T>(list: T[], index?: number) => T[]
->[5, 4, 3, 2, 1] : number[]
+>[5, 4, 3, 2, 1] : (1 | 2 | 3 | 4 | 5)[]
 >5 : 5
 >4 : 4
 >3 : 3
@@ -578,7 +578,7 @@ _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
 >_.without : <T>(list: T[], ...values: T[]) => T[]
 >_ : Underscore.Static
 >without : <T>(list: T[], ...values: T[]) => T[]
->[1, 2, 1, 0, 3, 1, 4] : number[]
+>[1, 2, 1, 0, 3, 1, 4] : (1 | 2 | 3 | 0 | 4)[]
 >1 : 1
 >2 : 2
 >1 : 1
@@ -594,16 +594,16 @@ _.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);
 >_.union : <T>(...arrays: T[][]) => T[]
 >_ : Underscore.Static
 >union : <T>(...arrays: T[][]) => T[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
->[101, 2, 1, 10] : number[]
+>[101, 2, 1, 10] : (1 | 2 | 10 | 101)[]
 >101 : 101
 >2 : 2
 >1 : 1
 >10 : 10
->[2, 1] : number[]
+>[2, 1] : (1 | 2)[]
 >2 : 2
 >1 : 1
 
@@ -612,16 +612,16 @@ _.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]);
 >_.intersection : <T>(...arrays: T[][]) => T[]
 >_ : Underscore.Static
 >intersection : <T>(...arrays: T[][]) => T[]
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
->[101, 2, 1, 10] : number[]
+>[101, 2, 1, 10] : (1 | 2 | 10 | 101)[]
 >101 : 101
 >2 : 2
 >1 : 1
 >10 : 10
->[2, 1] : number[]
+>[2, 1] : (1 | 2)[]
 >2 : 2
 >1 : 1
 
@@ -630,13 +630,13 @@ _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
 >_.difference : <T>(list: T[], ...others: T[][]) => T[]
 >_ : Underscore.Static
 >difference : <T>(list: T[], ...others: T[][]) => T[]
->[1, 2, 3, 4, 5] : number[]
+>[1, 2, 3, 4, 5] : (1 | 2 | 3 | 4 | 5)[]
 >1 : 1
 >2 : 2
 >3 : 3
 >4 : 4
 >5 : 5
->[5, 2, 10] : number[]
+>[5, 2, 10] : (2 | 5 | 10)[]
 >5 : 5
 >2 : 2
 >10 : 10
@@ -646,7 +646,7 @@ _.uniq([1, 2, 1, 3, 1, 4]);
 >_.uniq : { <T>(list: T[], isSorted?: boolean): T[]; <T, U>(list: T[], isSorted: boolean, iterator: Iterator_<T, U>, context?: any): U[]; }
 >_ : Underscore.Static
 >uniq : { <T>(list: T[], isSorted?: boolean): T[]; <T, U>(list: T[], isSorted: boolean, iterator: Iterator_<T, U>, context?: any): U[]; }
->[1, 2, 1, 3, 1, 4] : number[]
+>[1, 2, 1, 3, 1, 4] : (1 | 2 | 3 | 4)[]
 >1 : 1
 >2 : 2
 >1 : 1
@@ -659,11 +659,11 @@ _.zip(['moe', 'larry', 'curly'], [30, 40, 50], [true, false, false]);
 >_.zip : { <T0, T1>(a0: T0[], a1: T1[]): Tuple2<T0, T1>[]; <T0, T1, T2>(a0: T0[], a1: T1[], a2: T2[]): Tuple3<T0, T1, T2>[]; <T0, T1, T2, T3>(a0: T0[], a1: T1[], a2: T2[], a3: T3[]): Tuple4<T0, T1, T2, T3>[]; (...arrays: any[][]): any[][]; }
 >_ : Underscore.Static
 >zip : { <T0, T1>(a0: T0[], a1: T1[]): Tuple2<T0, T1>[]; <T0, T1, T2>(a0: T0[], a1: T1[], a2: T2[]): Tuple3<T0, T1, T2>[]; <T0, T1, T2, T3>(a0: T0[], a1: T1[], a2: T2[], a3: T3[]): Tuple4<T0, T1, T2, T3>[]; (...arrays: any[][]): any[][]; }
->['moe', 'larry', 'curly'] : string[]
+>['moe', 'larry', 'curly'] : ("moe" | "larry" | "curly")[]
 >'moe' : "moe"
 >'larry' : "larry"
 >'curly' : "curly"
->[30, 40, 50] : number[]
+>[30, 40, 50] : (40 | 50 | 30)[]
 >30 : 30
 >40 : 40
 >50 : 50
@@ -677,7 +677,7 @@ _.object(['moe', 'larry', 'curly'], [30, 40, 50]);
 >_.object : { (list: any[][]): any; (keys: string[], values: any[]): any; }
 >_ : Underscore.Static
 >object : { (list: any[][]): any; (keys: string[], values: any[]): any; }
->['moe', 'larry', 'curly'] : string[]
+>['moe', 'larry', 'curly'] : ("moe" | "larry" | "curly")[]
 >'moe' : "moe"
 >'larry' : "larry"
 >'curly' : "curly"
@@ -707,7 +707,7 @@ _.indexOf([1, 2, 3], 2);
 >_.indexOf : <T>(list: T[], value: T, isSorted?: boolean) => number
 >_ : Underscore.Static
 >indexOf : <T>(list: T[], value: T, isSorted?: boolean) => number
->[1, 2, 3] : number[]
+>[1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -718,7 +718,7 @@ _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
 >_.lastIndexOf : <T>(list: T[], value: T, fromIndex?: number) => number
 >_ : Underscore.Static
 >lastIndexOf : <T>(list: T[], value: T, fromIndex?: number) => number
->[1, 2, 3, 1, 2, 3] : number[]
+>[1, 2, 3, 1, 2, 3] : (1 | 2 | 3)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -732,7 +732,7 @@ _.sortedIndex([10, 20, 30, 40, 50], 35);
 >_.sortedIndex : { <T>(list: T[], obj: T, propertyName: string): number; <T>(list: T[], obj: T, iterator?: Iterator_<T, any>, context?: any): number; }
 >_ : Underscore.Static
 >sortedIndex : { <T>(list: T[], obj: T, propertyName: string): number; <T>(list: T[], obj: T, iterator?: Iterator_<T, any>, context?: any): number; }
->[10, 20, 30, 40, 50] : number[]
+>[10, 20, 30, 40, 50] : (40 | 50 | 10 | 30 | 20)[]
 >10 : 10
 >20 : 20
 >30 : 30
@@ -1159,7 +1159,7 @@ _.extend({ name: 'moe' }, { age: 50 });
 >_.extend : <T>(destination: T, ...sources: any[]) => T
 >_ : Underscore.Static
 >extend : <T>(destination: T, ...sources: any[]) => T
->{ name: 'moe' } : { name: string; }
+>{ name: 'moe' } : { name: "moe"; }
 >name : string
 >'moe' : "moe"
 >{ age: 50 } : { age: number; }
@@ -1171,7 +1171,7 @@ _.pick({ name: 'moe', age: 50, userid: 'moe1' }, 'name', 'age');
 >_.pick : <T>(object: T, ...keys: string[]) => T
 >_ : Underscore.Static
 >pick : <T>(object: T, ...keys: string[]) => T
->{ name: 'moe', age: 50, userid: 'moe1' } : { name: string; age: number; userid: string; }
+>{ name: 'moe', age: 50, userid: 'moe1' } : { name: "moe"; age: 50; userid: "moe1"; }
 >name : string
 >'moe' : "moe"
 >age : number
@@ -1186,7 +1186,7 @@ _.omit({ name: 'moe', age: 50, userid: 'moe1' }, 'userid');
 >_.omit : <T>(object: T, ...keys: string[]) => T
 >_ : Underscore.Static
 >omit : <T>(object: T, ...keys: string[]) => T
->{ name: 'moe', age: 50, userid: 'moe1' } : { name: string; age: number; userid: string; }
+>{ name: 'moe', age: 50, userid: 'moe1' } : { name: "moe"; age: 50; userid: "moe1"; }
 >name : string
 >'moe' : "moe"
 >age : number
@@ -1218,7 +1218,7 @@ _.clone({ name: 'moe' });
 >_.clone : <T>(object: T) => T
 >_ : Underscore.Static
 >clone : <T>(object: T) => T
->{ name: 'moe' } : { name: string; }
+>{ name: 'moe' } : { name: "moe"; }
 >name : string
 >'moe' : "moe"
 
@@ -1235,7 +1235,7 @@ _.chain([1, 2, 3, 200])
 >_.chain : { <T>(list: T[]): Underscore.ChainedArray<T>; <T>(list: Dictionary<T>): Underscore.ChainedDictionary<T>; <T>(obj: T): Underscore.ChainedObject<T>; }
 >_ : Underscore.Static
 >chain : { <T>(list: T[]): Underscore.ChainedArray<T>; <T>(list: Dictionary<T>): Underscore.ChainedDictionary<T>; <T>(obj: T): Underscore.ChainedObject<T>; }
->[1, 2, 3, 200] : number[]
+>[1, 2, 3, 200] : (1 | 2 | 3 | 200)[]
 >1 : 1
 >2 : 2
 >3 : 3
@@ -1723,7 +1723,7 @@ _.template("Using 'with': <%= data.answer %>", { answer: 'no' }, { variable: 'da
 >{ answer: 'no' } : { answer: string; }
 >answer : string
 >'no' : "no"
->{ variable: 'data' } : { variable: string; }
+>{ variable: 'data' } : { variable: "data"; }
 >variable : string
 >'data' : "data"
 
diff --git a/tests/baselines/reference/unionTypeFromArrayLiteral.errors.txt b/tests/baselines/reference/unionTypeFromArrayLiteral.errors.txt
index 2ecce8a802ea6..47157b453b130 100644
--- a/tests/baselines/reference/unionTypeFromArrayLiteral.errors.txt
+++ b/tests/baselines/reference/unionTypeFromArrayLiteral.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/union/unionTypeFromArrayLiteral.ts(9,5): error TS2322: Type '[number, string, string]' is not assignable to type '[number, string]'.
+tests/cases/conformance/types/union/unionTypeFromArrayLiteral.ts(9,5): error TS2322: Type '[3, "three", "hello"]' is not assignable to type '[number, string]'.
   Types of property 'length' are incompatible.
     Type '3' is not assignable to type '2'.
 
@@ -14,7 +14,7 @@ tests/cases/conformance/types/union/unionTypeFromArrayLiteral.ts(9,5): error TS2
     var arr3Tuple: [number, string] = [3, "three"]; // [number, string]
     var arr4Tuple: [number, string] = [3, "three", "hello"]; // [number, string, string]
         ~~~~~~~~~
-!!! error TS2322: Type '[number, string, string]' is not assignable to type '[number, string]'.
+!!! error TS2322: Type '[3, "three", "hello"]' is not assignable to type '[number, string]'.
 !!! error TS2322:   Types of property 'length' are incompatible.
 !!! error TS2322:     Type '3' is not assignable to type '2'.
     var arrEmpty = [];
diff --git a/tests/baselines/reference/unionTypeFromArrayLiteral.types b/tests/baselines/reference/unionTypeFromArrayLiteral.types
index efff5e5e21909..16a3f326244b4 100644
--- a/tests/baselines/reference/unionTypeFromArrayLiteral.types
+++ b/tests/baselines/reference/unionTypeFromArrayLiteral.types
@@ -18,13 +18,13 @@ var arr2 = ["hello", true]; // (string | number)[]
 
 var arr3Tuple: [number, string] = [3, "three"]; // [number, string]
 >arr3Tuple : [number, string]
->[3, "three"] : [number, string]
+>[3, "three"] : [3, "three"]
 >3 : 3
 >"three" : "three"
 
 var arr4Tuple: [number, string] = [3, "three", "hello"]; // [number, string, string]
 >arr4Tuple : [number, string]
->[3, "three", "hello"] : [number, string, string]
+>[3, "three", "hello"] : [3, "three", "hello"]
 >3 : 3
 >"three" : "three"
 >"hello" : "hello"
@@ -39,7 +39,7 @@ var arr5Tuple: {
     0: string;
     5: number;
 } = ["hello", true, false, " hello", true, 10, "any"]; // Tuple
->["hello", true, false, " hello", true, 10, "any"] : [string, boolean, boolean, string, boolean, number, string]
+>["hello", true, false, " hello", true, 10, "any"] : ["hello", boolean, boolean, string, boolean, 10, string]
 >"hello" : "hello"
 >true : true
 >false : false
diff --git a/tests/baselines/reference/unionTypeInference.types b/tests/baselines/reference/unionTypeInference.types
index ebaf8c014026e..eec9e6a25bcfa 100644
--- a/tests/baselines/reference/unionTypeInference.types
+++ b/tests/baselines/reference/unionTypeInference.types
@@ -77,7 +77,7 @@ var b1 = g(["string", true]);
 >b1 : boolean
 >g(["string", true]) : boolean
 >g : <T>(value: [string, T]) => T
->["string", true] : [string, true]
+>["string", true] : ["string", true]
 >"string" : "string"
 >true : true
 
diff --git a/tests/baselines/reference/unusedImportDeclaration.types b/tests/baselines/reference/unusedImportDeclaration.types
index e5fc93940c70b..196835e0f57b0 100644
--- a/tests/baselines/reference/unusedImportDeclaration.types
+++ b/tests/baselines/reference/unusedImportDeclaration.types
@@ -5,7 +5,7 @@ import B = require("./unusedImportDeclaration_testerB");
 var thingy: B = {
 >thingy : B
 >B : B
->{    me: "A"} : { me: string; }
+>{    me: "A"} : { me: "A"; }
 
     me: "A"
 >me : string
diff --git a/tests/baselines/reference/useBeforeDeclaration.types b/tests/baselines/reference/useBeforeDeclaration.types
index 9875379e5c98b..ad4444c830764 100644
--- a/tests/baselines/reference/useBeforeDeclaration.types
+++ b/tests/baselines/reference/useBeforeDeclaration.types
@@ -29,7 +29,7 @@ namespace ts {
     export let sys:{version:string} = {version: "2.0.5"};
 >sys : { version: string; }
 >version : string
->{version: "2.0.5"} : { version: string; }
+>{version: "2.0.5"} : { version: "2.0.5"; }
 >version : string
 >"2.0.5" : "2.0.5"
 
diff --git a/tests/baselines/reference/validMultipleVariableDeclarations.types b/tests/baselines/reference/validMultipleVariableDeclarations.types
index fcd17cb4b142b..7a8a49182fc55 100644
--- a/tests/baselines/reference/validMultipleVariableDeclarations.types
+++ b/tests/baselines/reference/validMultipleVariableDeclarations.types
@@ -53,7 +53,7 @@ var p = { x: 1, y: 2 };
 var p: Point = { x: 0, y: undefined };
 >p : Point
 >Point : Point
->{ x: 0, y: undefined } : { x: number; y: undefined; }
+>{ x: 0, y: undefined } : { x: 0; y: undefined; }
 >x : number
 >0 : 0
 >y : undefined
@@ -72,7 +72,7 @@ var p: { x: number; y: number; } = { x: 1, y: 2 };
 >p : Point
 >x : number
 >y : number
->{ x: 1, y: 2 } : { x: number; y: number; }
+>{ x: 1, y: 2 } : { x: 1; y: 2; }
 >x : number
 >1 : 1
 >y : number
@@ -83,7 +83,7 @@ var p = <{ x: number; y: number; }>{ x: 0, y: undefined };
 ><{ x: number; y: number; }>{ x: 0, y: undefined } : { x: number; y: number; }
 >x : number
 >y : number
->{ x: 0, y: undefined } : { x: number; y: undefined; }
+>{ x: 0, y: undefined } : { x: 0; y: undefined; }
 >x : number
 >0 : 0
 >y : undefined
diff --git a/tests/baselines/reference/vardecl.types b/tests/baselines/reference/vardecl.types
index 4a72683a35b5f..765b93c1f20d2 100644
--- a/tests/baselines/reference/vardecl.types
+++ b/tests/baselines/reference/vardecl.types
@@ -39,7 +39,7 @@ declare var deckareVarWithType: number;
 
 var arrayVar: string[] = ['a', 'b'];
 >arrayVar : string[]
->['a', 'b'] : string[]
+>['a', 'b'] : ("a" | "b")[]
 >'a' : "a"
 >'b' : "b"
 
@@ -53,7 +53,7 @@ complicatedArrayVar.push({ x: 30, y : 'hello world' });
 >complicatedArrayVar.push : (...items: { x: number; y: string; }[]) => number
 >complicatedArrayVar : { x: number; y: string; }[]
 >push : (...items: { x: number; y: string; }[]) => number
->{ x: 30, y : 'hello world' } : { x: number; y: string; }
+>{ x: 30, y : 'hello world' } : { x: 30; y: "hello world"; }
 >x : number
 >30 : 30
 >y : string
diff --git a/tests/baselines/reference/variableDeclaratorResolvedDuringContextualTyping.types b/tests/baselines/reference/variableDeclaratorResolvedDuringContextualTyping.types
index ffc5dafed2032..fd493dd01a511 100644
--- a/tests/baselines/reference/variableDeclaratorResolvedDuringContextualTyping.types
+++ b/tests/baselines/reference/variableDeclaratorResolvedDuringContextualTyping.types
@@ -376,7 +376,7 @@ class FileService {
 >this : this
 >requestService : Services.IRequestService
 >makeRequest : (options: WinJS.IXHROptions) => WinJS.Promise
->{            url: this.requestService.getRequestUrl('root', path),            type: 'POST',            headers: {},            data: "someData"        } : { url: string; type: string; headers: {}; data: string; }
+>{            url: this.requestService.getRequestUrl('root', path),            type: 'POST',            headers: {},            data: "someData"        } : { url: string; type: "POST"; headers: {}; data: string; }
 
             url: this.requestService.getRequestUrl('root', path),
 >url : string
diff --git a/tests/baselines/reference/voidOperatorWithNumberType.types b/tests/baselines/reference/voidOperatorWithNumberType.types
index ff9e66d554cc6..a01b5e2f98308 100644
--- a/tests/baselines/reference/voidOperatorWithNumberType.types
+++ b/tests/baselines/reference/voidOperatorWithNumberType.types
@@ -5,7 +5,7 @@ var NUMBER: number;
 
 var NUMBER1: number[] = [1, 2];
 >NUMBER1 : number[]
->[1, 2] : number[]
+>[1, 2] : (1 | 2)[]
 >1 : 1
 >2 : 2
 
diff --git a/tests/baselines/reference/voidOperatorWithStringType.types b/tests/baselines/reference/voidOperatorWithStringType.types
index 1e3751a3a0f52..f6dc730ae39d5 100644
--- a/tests/baselines/reference/voidOperatorWithStringType.types
+++ b/tests/baselines/reference/voidOperatorWithStringType.types
@@ -5,7 +5,7 @@ var STRING: string;
 
 var STRING1: string[] = ["", "abc"];
 >STRING1 : string[]
->["", "abc"] : string[]
+>["", "abc"] : ("" | "abc")[]
 >"" : ""
 >"abc" : "abc"
 
diff --git a/tests/baselines/reference/widenToAny1.types b/tests/baselines/reference/widenToAny1.types
index ad36713fad449..f4788ecf45468 100644
--- a/tests/baselines/reference/widenToAny1.types
+++ b/tests/baselines/reference/widenToAny1.types
@@ -16,7 +16,7 @@ var z1: number = foo1({ x: undefined, y: "def" });  // Best common type is any
 >z1 : number
 >foo1({ x: undefined, y: "def" }) : string
 >foo1 : <T>(f1: { x: T; y: T; }) => T
->{ x: undefined, y: "def" } : { x: undefined; y: string; }
+>{ x: undefined, y: "def" } : { x: undefined; y: "def"; }
 >x : undefined
 >undefined : undefined
 >y : string
diff --git a/tests/baselines/reference/widenToAny2.types b/tests/baselines/reference/widenToAny2.types
index 243a4f1419e35..ca58c49e3186f 100644
--- a/tests/baselines/reference/widenToAny2.types
+++ b/tests/baselines/reference/widenToAny2.types
@@ -13,7 +13,7 @@ var z3:number = foo3([undefined, "def"]);  // Type is any, but should be string
 >z3 : number
 >foo3([undefined, "def"]) : string
 >foo3 : <T>(x: T[]) => T
->[undefined, "def"] : string[]
+>[undefined, "def"] : "def"[]
 >undefined : undefined
 >"def" : "def"
 
diff --git a/tests/baselines/reference/withExportDecl.types b/tests/baselines/reference/withExportDecl.types
index b94409bfcc9f5..c41571c441cf1 100644
--- a/tests/baselines/reference/withExportDecl.types
+++ b/tests/baselines/reference/withExportDecl.types
@@ -59,7 +59,7 @@ export declare var exportedDeclaredVar: number;
 
 var arrayVar: string[] = ['a', 'b'];
 >arrayVar : string[]
->['a', 'b'] : string[]
+>['a', 'b'] : ("a" | "b")[]
 >'a' : "a"
 >'b' : "b"
 
@@ -73,7 +73,7 @@ exportedArrayVar.push({ x: 30, y : 'hello world' });
 >exportedArrayVar.push : (...items: { x: number; y: string; }[]) => number
 >exportedArrayVar : { x: number; y: string; }[]
 >push : (...items: { x: number; y: string; }[]) => number
->{ x: 30, y : 'hello world' } : { x: number; y: string; }
+>{ x: 30, y : 'hello world' } : { x: 30; y: "hello world"; }
 >x : number
 >30 : 30
 >y : string
diff --git a/tests/baselines/reference/withImportDecl.types b/tests/baselines/reference/withImportDecl.types
index 3dabc64db266c..d4bd6c8a81a11 100644
--- a/tests/baselines/reference/withImportDecl.types
+++ b/tests/baselines/reference/withImportDecl.types
@@ -40,7 +40,7 @@ declare var deckareVarWithType: number;
 
 var arrayVar: string[] = ['a', 'b'];
 >arrayVar : string[]
->['a', 'b'] : string[]
+>['a', 'b'] : ("a" | "b")[]
 >'a' : "a"
 >'b' : "b"
 
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints3.errors.txt b/tests/baselines/reference/wrappedAndRecursiveConstraints3.errors.txt
new file mode 100644
index 0000000000000..a3060ccc2cb0c
--- /dev/null
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints3.errors.txt
@@ -0,0 +1,23 @@
+tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursiveConstraints3.ts(14,28): error TS2345: Argument of type '{ length: 3; charAt: (x: number) => void; }' is not assignable to parameter of type '{ length: 2; }'.
+  Object literal may only specify known properties, and 'charAt' does not exist in type '{ length: 2; }'.
+
+
+==== tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursiveConstraints3.ts (1 errors) ====
+    // no errors expected
+    
+    class C<T extends { length: number }> {
+        constructor(x: T) { }
+        foo<U extends T>(x: U) {
+            function bar<V extends U>(x: V) {
+                return x;
+            }
+            return bar;
+        }
+    }
+    
+    var c = new C({ length: 2 });
+    var r = c.foo({ length: 3, charAt: (x: number) => { '' } });
+                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2345: Argument of type '{ length: 3; charAt: (x: number) => void; }' is not assignable to parameter of type '{ length: 2; }'.
+!!! error TS2345:   Object literal may only specify known properties, and 'charAt' does not exist in type '{ length: 2; }'.
+    var r2 = r('');
\ No newline at end of file
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints3.types b/tests/baselines/reference/wrappedAndRecursiveConstraints3.types
index 2c4b5727abe83..a31c66300784a 100644
--- a/tests/baselines/reference/wrappedAndRecursiveConstraints3.types
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints3.types
@@ -33,19 +33,19 @@ class C<T extends { length: number }> {
 }
 
 var c = new C({ length: 2 });
->c : C<{ length: number; }>
->new C({ length: 2 }) : C<{ length: number; }>
+>c : C<{ length: 2; }>
+>new C({ length: 2 }) : C<{ length: 2; }>
 >C : typeof C
->{ length: 2 } : { length: number; }
+>{ length: 2 } : { length: 2; }
 >length : number
 >2 : 2
 
 var r = c.foo({ length: 3, charAt: (x: number) => { '' } });
->r : <V extends { length: number; charAt: (x: number) => void; }>(x: V) => V
->c.foo({ length: 3, charAt: (x: number) => { '' } }) : <V extends { length: number; charAt: (x: number) => void; }>(x: V) => V
->c.foo : <U extends { length: number; }>(x: U) => <V extends U>(x: V) => V
->c : C<{ length: number; }>
->foo : <U extends { length: number; }>(x: U) => <V extends U>(x: V) => V
+>r : any
+>c.foo({ length: 3, charAt: (x: number) => { '' } }) : any
+>c.foo : <U extends { length: 2; }>(x: U) => <V extends U>(x: V) => V
+>c : C<{ length: 2; }>
+>foo : <U extends { length: 2; }>(x: U) => <V extends U>(x: V) => V
 >{ length: 3, charAt: (x: number) => { '' } } : { length: number; charAt: (x: number) => void; }
 >length : number
 >3 : 3
@@ -55,8 +55,8 @@ var r = c.foo({ length: 3, charAt: (x: number) => { '' } });
 >'' : ""
 
 var r2 = r('');
->r2 : string
->r('') : ""
->r : <V extends { length: number; charAt: (x: number) => void; }>(x: V) => V
+>r2 : any
+>r('') : any
+>r : any
 >'' : ""
 
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints4.errors.txt b/tests/baselines/reference/wrappedAndRecursiveConstraints4.errors.txt
index 47e8e6ff4f295..db2544e35b023 100644
--- a/tests/baselines/reference/wrappedAndRecursiveConstraints4.errors.txt
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints4.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursiveConstraints4.ts(13,12): error TS2345: Argument of type '{ length: number; charAt: (x: number) => void; }' is not assignable to parameter of type 'string'.
+tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursiveConstraints4.ts(12,15): error TS2345: Argument of type '""' is not assignable to parameter of type '{ length: 2; }'.
 
 
 ==== tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursiveConstraints4.ts (1 errors) ====
@@ -14,6 +14,6 @@ tests/cases/conformance/types/typeParameters/typeArgumentLists/wrappedAndRecursi
     
     var c = new C({ length: 2 });
     var r = c.foo('');
-    var r2 = r({ length: 3, charAt: (x: number) => { '' } }); // error
-               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2345: Argument of type '{ length: number; charAt: (x: number) => void; }' is not assignable to parameter of type 'string'.
\ No newline at end of file
+                  ~~
+!!! error TS2345: Argument of type '""' is not assignable to parameter of type '{ length: 2; }'.
+    var r2 = r({ length: 3, charAt: (x: number) => { '' } }); // error
\ No newline at end of file
diff --git a/tests/baselines/reference/wrappedAndRecursiveConstraints4.types b/tests/baselines/reference/wrappedAndRecursiveConstraints4.types
index 84fa3d53ad262..22ed9e1390c70 100644
--- a/tests/baselines/reference/wrappedAndRecursiveConstraints4.types
+++ b/tests/baselines/reference/wrappedAndRecursiveConstraints4.types
@@ -31,25 +31,25 @@ class C<T extends { length: number }> {
 }
 
 var c = new C({ length: 2 });
->c : C<{ length: number; }>
->new C({ length: 2 }) : C<{ length: number; }>
+>c : C<{ length: 2; }>
+>new C({ length: 2 }) : C<{ length: 2; }>
 >C : typeof C
->{ length: 2 } : { length: number; }
+>{ length: 2 } : { length: 2; }
 >length : number
 >2 : 2
 
 var r = c.foo('');
->r : <V extends string>(x: V) => V
->c.foo('') : <V extends string>(x: V) => V
->c.foo : <U extends { length: number; }>(x: U) => <V extends U>(x: V) => V
->c : C<{ length: number; }>
->foo : <U extends { length: number; }>(x: U) => <V extends U>(x: V) => V
+>r : any
+>c.foo('') : any
+>c.foo : <U extends { length: 2; }>(x: U) => <V extends U>(x: V) => V
+>c : C<{ length: 2; }>
+>foo : <U extends { length: 2; }>(x: U) => <V extends U>(x: V) => V
 >'' : ""
 
 var r2 = r({ length: 3, charAt: (x: number) => { '' } }); // error
 >r2 : any
 >r({ length: 3, charAt: (x: number) => { '' } }) : any
->r : <V extends string>(x: V) => V
+>r : any
 >{ length: 3, charAt: (x: number) => { '' } } : { length: number; charAt: (x: number) => void; }
 >length : number
 >3 : 3
diff --git a/tests/cases/compiler/contextualTypeShouldBeLiteral.ts b/tests/cases/compiler/contextualTypeShouldBeLiteral.ts
new file mode 100644
index 0000000000000..1012c567a71b5
--- /dev/null
+++ b/tests/cases/compiler/contextualTypeShouldBeLiteral.ts
@@ -0,0 +1,96 @@
+// @strict: true
+interface X {
+    type: 'x';
+    value: string;
+    method(): void;
+}
+
+interface Y {
+    type: 'y';
+    value: 'none' | 'done';
+    method(): void;
+}
+
+function foo(bar: X | Y) { }
+
+foo({
+    type: 'y',
+    value: 'done',
+    method() {
+        this;
+        this.type;
+        this.value;
+    }
+});
+
+interface X2 {
+    type1: 'x';
+    value: string;
+    method(): void;
+}
+
+interface Y2 {
+    type2: 'y';
+    value: 'none' | 'done';
+    method(): void;
+}
+
+function foo2(bar: X2 | Y2) { }
+
+foo2({
+    type2: 'y',
+    value: 'done',
+    method() {
+        this;
+        this.value;
+    }
+});
+
+interface X3 {
+    type: 'x';
+    value: 1 | 2 | 3;
+    xtra: number;
+}
+
+interface Y3 {
+    type: 'y';
+    value: 11 | 12 | 13;
+    ytra: number;
+}
+
+let xy: X3 | Y3 = {
+    type: 'y',
+    value: 11,
+    ytra: 12
+};
+
+xy;
+
+
+interface LikeA {
+    x: 'x';
+    y: 'y';
+    value: string;
+    method(): void;
+}
+
+interface LikeB {
+    x: 'xx';
+    y: 'yy';
+    value: number;
+    method(): void;
+}
+
+let xyz: LikeA | LikeB = {
+    x: 'x',
+    y: 'y',
+    value: "foo",
+    method() {
+        this;
+        this.x;
+        this.y;
+        this.value;
+    }
+};
+
+xyz;
\ No newline at end of file
diff --git a/tests/cases/compiler/nestedTypeVariableInfersLiteral.ts b/tests/cases/compiler/nestedTypeVariableInfersLiteral.ts
new file mode 100644
index 0000000000000..697e2227da40f
--- /dev/null
+++ b/tests/cases/compiler/nestedTypeVariableInfersLiteral.ts
@@ -0,0 +1,18 @@
+// https://github.com/Microsoft/TypeScript/issues/19632
+declare function direct<A extends string>(a: A | A[]): Record<A, string>
+declare function nested<A extends string>(a: { fields: A }): Record<A, string>
+declare function nestedUnion<A extends string>(a: { fields: A | A[] }): Record<A, string>
+
+const directUnionSingle = direct("z")
+const directUnionArray = direct(["z", "y"])
+const nestedSingle = nested({fields: "z"})
+const nestedUnionSingle = nestedUnion({fields: "z"})
+const nestedUnionArray = nestedUnion({fields: ["z", "y"]})
+
+declare function hasZField(arg: { z: string }): void
+
+hasZField(directUnionSingle) // ok
+hasZField(directUnionArray) // ok
+hasZField(nestedSingle) // ok
+hasZField(nestedUnionSingle) // ok
+hasZField(nestedUnionArray) // ok
\ No newline at end of file