[GHC] #4349: ASSERT failed! file compiler/types/FamInstEnv.lhs

[GHC]

#4349: ASSERT failed! file compiler/types/FamInstEnv.lhs
----------------------------------+-----------------------------------------
    Reporter:  daniel.is.fischer  |       Owner:                     
        Type:  bug                |      Status:  new                
    Priority:  normal             |   Component:  Compiler           
     Version:  7.1                |    Keywords:                     
    Testcase:                     |   Blockedby:                     
          Os:  Linux              |    Blocking:                     
Architecture:  x86                |     Failure:  Building GHC failed
----------------------------------+-----------------------------------------
 Building the current HEAD (darcs pull -a; ./darcs-all pull -a today)
 failed with the error
 {{{
 "inplace/bin/ghc-stage2"   -H32m -O -fasm [...snip...]
  -c libraries/vector/./Data/Vector/Unboxed.hs
  -o libraries/vector/dist-install/build/Data/Vector/Unboxed.o
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 7.1.20100928 for i386-unknown-linux):
         ASSERT failed! file compiler/types/FamInstEnv.lhs, line 321

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}
 Before that it spat out a lot of warnings.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4349>
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