[GHC] #930: ghc-6.6: panic! (the 'impossible' happened) mkWWcpr: not a product GHC-Brian-6.5.1:IdInfo.IdInfo{tc rfD}

[GHC]

#930: ghc-6.6: panic! (the 'impossible' happened) mkWWcpr: not a product GHC-
Brian-6.5.1:IdInfo.IdInfo{tc rfD}
-------------------------+--------------------------------------------------
  Reporter:  briansmith  |          Owner:         
      Type:  bug         |         Status:  new    
  Priority:  normal      |      Milestone:         
 Component:  Compiler    |        Version:  6.5    
  Severity:  normal      |     Resolution:         
  Keywords:              |             Os:  Unknown
Difficulty:  Unknown     |   Architecture:  Unknown
-------------------------+--------------------------------------------------
Comment (by briansmith):

 Another workaround seems to be to use a makefile and "ghc -c" instead of
 "ghc --make." I compile GHC using its makefile all the time with -O2
 without incident.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/930>
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