[GHC] #3118: ghc: panic! (the 'impossible' happened): Missing alternative

[GHC]

#3118: ghc: panic! (the 'impossible' happened): Missing alternative
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    Reporter:  calvins         |        Owner:         
        Type:  bug             |       Status:  new    
    Priority:  normal          |    Milestone:         
   Component:  Compiler        |      Version:  6.10.1 
    Severity:  normal          |   Resolution:         
    Keywords:                  |   Difficulty:  Unknown
    Testcase:                  |           Os:  Linux  
Architecture:  x86_64 (amd64)  |  
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Comment (by calvins):

 I'm unable to install 'cabal install' on a clean Ubuntu install because it
 doesn't seem to work with Parsec 3, which my library required.

 Are you able to compile with plain cabal? I checked the cabal conf files
 for the dependencies and verified that none of them specify Parsec
 2.1.0.1. They all compile fine for me against Parsec-3.0.0 as long as I
 use 'runhaskell Setup ...' to compile and install rather than 'cabal
 install'.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3118#comment:4>
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