[GHC] #1684: impossible happened when compiling darcs with GADTs.

[GHC]

#1684: impossible happened when compiling darcs with GADTs.
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    Reporter:  droundy at darcs.net  |        Owner:         
        Type:  bug                |       Status:  new    
    Priority:  normal             |    Milestone:         
   Component:  Compiler           |      Version:  6.6    
    Severity:  normal             |   Resolution:         
    Keywords:                     |   Difficulty:  Unknown
          Os:  Linux              |     Testcase:         
Architecture:  x86_64 (amd64)     |  
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Comment (by guest):

 Note: to reproduce this requires a copy of not-yet-unstable code to darcs.
 This bug isn't hurting me yet, so unless you really want to track it down,
 I'll not bother tarring up a batch of source code.

 David

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1684>
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