Test for issue haskell#3436.

cabal-install/cabal-install.cabal

@@ -23,6 +23,13 @@ Extra-Source-Files:
   -- Do NOT edit this section manually; instead, run the script.
   -- BEGIN gen-extra-source-files
   tests/IntegrationTests/common.sh
+  tests/IntegrationTests/custom-setup/Cabal-99998/Cabal.cabal
+  tests/IntegrationTests/custom-setup/Cabal-99998/CabalMessage.hs
+  tests/IntegrationTests/custom-setup/Cabal-99999/Cabal.cabal
+  tests/IntegrationTests/custom-setup/Cabal-99999/CabalMessage.hs
+  tests/IntegrationTests/custom-setup/custom-setup/Setup.hs
+  tests/IntegrationTests/custom-setup/custom-setup/custom-setup.cabal
+  tests/IntegrationTests/custom-setup/installs_Cabal_as_setup_dep.sh
   tests/IntegrationTests/custom/custom_dep.sh
   tests/IntegrationTests/custom/custom_dep/client/B.hs
   tests/IntegrationTests/custom/custom_dep/client/Setup.hs

cabal-install/tests/IntegrationTests/custom-setup/Cabal-99998/Cabal.cabal

@@ -0,0 +1,8 @@
+name: Cabal
+version: 99998
+build-type: Simple
+cabal-version: >= 1.2
+
+library
+  build-depends: base
+  exposed-modules: CabalMessage

cabal-install/tests/IntegrationTests/custom-setup/Cabal-99998/CabalMessage.hs

@@ -0,0 +1,3 @@
+module CabalMessage where
+
+message = "This is Cabal-99998"

cabal-install/tests/IntegrationTests/custom-setup/Cabal-99999/Cabal.cabal

@@ -0,0 +1,8 @@
+name: Cabal
+version: 99999
+build-type: Simple
+cabal-version: >= 1.2
+
+library
+  build-depends: base
+  exposed-modules: CabalMessage

cabal-install/tests/IntegrationTests/custom-setup/Cabal-99999/CabalMessage.hs

@@ -0,0 +1,3 @@
+module CabalMessage where
+
+message = "This is Cabal-99999"

cabal-install/tests/IntegrationTests/custom-setup/custom-setup/Setup.hs

@@ -0,0 +1,5 @@
+import CabalMessage (message)
+import System.Exit
+import System.IO
+
+main = hPutStrLn stderr message >> exitFailure

cabal-install/tests/IntegrationTests/custom-setup/custom-setup/custom-setup.cabal

@@ -0,0 +1,9 @@
+name: custom-setup
+version: 1.0
+build-type: Custom
+cabal-version: >= 99999
+
+custom-setup
+  setup-depends: base, Cabal >= 99999
+
+library

cabal-install/tests/IntegrationTests/custom-setup/installs_Cabal_as_setup_dep.sh

@@ -0,0 +1,15 @@
+# Regression test for issue #3436
+
+. ./common.sh
+cabal sandbox init
+cabal install ./Cabal-99998
+cabal sandbox add-source Cabal-99999
+
+# Install custom-setup, which has a setup dependency on Cabal-99999.
+# cabal should build the setup script with Cabal-99999, but then
+# configure should fail because Setup just prints an error message
+# imported from Cabal and exits.
+! cabal install custom-setup/ > output 2>&1
+
+cat output
+grep -q "This is Cabal-99999" output || die "Expected output from Cabal-99999"