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  • Glasgow Haskell CompilerGlasgow Haskell Compiler
  • GHCGHC
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  • #6067
Closed
Open
Issue created May 01, 2012 by Simon Marlow@simonmarDeveloper

regression: cgrun051(ghci) failing in HEAD

=====> cgrun051(ghci) 46 of 79 [0, 0, 0]
cd . && '/64playpen/simonmar/nightly/HEAD-cam-04-unx/x86_64-unknown-linux/inplace/bin/ghc-stage2' -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-conf -rtsopts  -fno-ghci-history cgrun051.hs --interactive -v0 -ignore-dot-ghci +RTS -I0.1 -RTS   <cgrun051.genscript 1>cgrun051.interp.stdout 2>cgrun051.interp.stderr
Actual stderr output differs from expected:
--- ./cgrun051.stderr   2012-04-30 18:02:44.638862376 +0100
+++ ./cgrun051.run.stderr       2012-05-01 11:19:15.808880452 +0100
@@ -1 +1 @@
-cgrun051: OK
+cgrun051: Impossible case alternative
*** unexpected failure for cgrun051(ghci)

The code is very simple. For some reason the simplifier is replacing the error "OK" with runtimeError "Impossible case alternative", but only in GHCi.

Trac metadata
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Version 7.5
Type Bug
TypeOfFailure OtherFailure
Priority highest
Resolution Unresolved
Component Compiler
Test case
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