[GHC] #2799: Panic (core lint failure) with GADTs, GHC 6.10.1

[GHC]

#2799: Panic (core lint failure) with GADTs, GHC 6.10.1
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    Reporter:  alexey_r  |        Owner:         
        Type:  bug       |       Status:  new    
    Priority:  normal    |    Milestone:         
   Component:  Compiler  |      Version:  6.10.1 
    Severity:  major     |   Resolution:         
    Keywords:            |     Testcase:         
Architecture:  x86       |           Os:  Windows
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Comment (by BenMoseley):

 Wonder if this is the same:
 http://hackage.haskell.org/trac/ghc/ticket/2787

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2799#comment:1>
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