[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             |    Milestone:                     
   Component:  Compiler           |      Version:  7.1                
    Keywords:                     |     Testcase:                     
   Blockedby:                     |   Difficulty:                     
          Os:  Linux              |     Blocking:                     
Architecture:  x86                |      Failure:  Building GHC failed
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Comment(by daniel.is.fischer):

 Stranger and stranger. A vanilla "quick" build went through in the first
 tree. After that I made maintainer-clean, perl booted, selected a quasi
 "quickest" build with added -DDEBUG and -dcore-lint:
 {{{
 SRC_HC_OPTS        = -H64m -O0 -fasm
 GhcStage1HcOpts    = -O -fasm
 GhcStage2HcOpts    = -O0 -fasm -DDEBUG -dcore-lint
 GhcLibHcOpts       = -O0 -fasm -dcore-lint
 SplitObjs          = NO
 HADDOCK_DOCS       = NO
 BUILD_DOCBOOK_HTML = NO
 BUILD_DOCBOOK_PS   = NO
 BUILD_DOCBOOK_PDF  = NO
 }}}
 and inserted the suggested `ASSERT2`.

 The build failed again, the assert printed out lots of core (more than the
 console could remember).
 I'm rerunning now with redirected stderr and stdout. Should fail in about
 20 minutes.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4349#comment:5>
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