[GHC] #810: GHC complains about missing instance in conjunction with GADTs

[GHC]

#810: GHC complains about missing instance in conjunction with GADTs
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  Reporter:  wolfgang at jeltsch.net  |          Owner:       
      Type:  bug                   |         Status:  new  
  Priority:  normal                |      Milestone:       
 Component:  Compiler              |        Version:  6.4.1
  Severity:  normal                |     Resolution:       
  Keywords:                        |             Os:  Linux
Difficulty:  Unknown               |   Architecture:  x86  
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Comment (by guest):

 simonpj wrote:
   Seems all right with GHC 6.4.2 to me. I dn't nkow what Chris thinks
 doesn't work.

 What Chris means is that the example code is accepted by GHCi 6.4.2 (which
 is the right behavior, in my opinion) but it's not accepted by the
 ordinary GHC compiler of the same version.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/810>
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