Parsing was aborted error while using popMode/pushMode

[gregbugaj]

Plugin shows an error while trying to 'Test ANTL Rule' while trying to use pushMode and popMode
However the runtime(javascript) has not issues processing the input.

Input :

class a13 extends `` {}

Lexer rule :

BackTick:                       '`' {this.IncreaseTemplateDepth();} -> pushMode(TEMPLATE);
mode TEMPLATE;
BackTickInside:                 '`' {this.DecreaseTemplateDepth();} -> type(BackTick), popMode;
TemplateStringStartExpression:  '${' -> pushMode(DEFAULT_MODE);
TemplateStringAtom:             ~[`];

Exception in IntelliJ

java.util.EmptyStackException
	at org.antlr.v4.runtime.Lexer.popMode(Lexer.java:192)
	at org.antlr.v4.runtime.atn.LexerPopModeAction.execute(LexerPopModeAction.java:58)
	at org.antlr.v4.runtime.atn.LexerActionExecutor.execute(LexerActionExecutor.java:168)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.accept(LexerATNSimulator.java:366)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.failOrAccept(LexerATNSimulator.java:299)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.execATN(LexerATNSimulator.java:230)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.matchATN(LexerATNSimulator.java:156)
	at org.antlr.v4.runtime.atn.LexerATNSimulator.match(LexerATNSimulator.java:111)
	at org.antlr.v4.runtime.Lexer.nextToken(Lexer.java:141)
	at org.antlr.v4.runtime.BufferedTokenStream.fetch(BufferedTokenStream.java:169)
	at org.antlr.v4.runtime.BufferedTokenStream.fill(BufferedTokenStream.java:485)
	at org.antlr.v4.runtime.BufferedTokenStream.getText(BufferedTokenStream.java:452)
	at org.antlr.v4.runtime.BufferedTokenStream.getText(BufferedTokenStream.java:474)
	at org.antlr.v4.runtime.DefaultErrorStrategy.reportNoViableAlternative(DefaultErrorStrategy.java:304)
	at org.antlr.v4.runtime.DefaultErrorStrategy.reportError(DefaultErrorStrategy.java:136)
	at org.antlr.v4.runtime.ParserInterpreter.parse(ParserInterpreter.java:199)
	at org.antlr.intellij.plugin.parsing.ParsingUtils.parseText(ParsingUtils.java:251)
	at org.antlr.intellij.plugin.parsing.ParsingUtils.parseText(ParsingUtils.java:211)
	at org.antlr.intellij.plugin.ANTLRv4PluginController.lambda$parseText$1(ANTLRv4PluginController.java:438)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$computeInBackgroundAndTryWait$6(BackgroundTaskUtil.java:170)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:183)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:705)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:647)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:63)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:170)
	at com.intellij.openapi.progress.util.BackgroundTaskUtil.lambda$computeInBackgroundAndTryWait$7(BackgroundTaskUtil.java:169)
	at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:265)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
	at java.base/java.lang.Thread.run(Thread.java:829)

[bjansen]

The IDE delegates the actual parsing to ANTLR, so I think it's either a bug in your grammar or a bug that should be reported at https://github.com/antlr/antlr4

Have you tried generating a Java parser and testing your input with grun? If the Java parser also fails to parse your input, that could indicate a bug in your grammar.

[KvanTTT]

Most likely this relates to antlr/antlr4#2006

[parrt]

Hi. since this is executing actions it can't be an issue with the plug-in so I will close.

[KvanTTT]

It doesn't relate to actions, it can be reproduced using very simple grammar:

lexer grammar T;
A: 'aa';
B: 'bb' -> popMode;
C: 'cc';

Input:

aabbcc

But it's related to ANTLR core, not plugin.