[GHC] #1033: ghc-6.7: panic! (the 'impossible' happened) -- typechecker getting confused by Data.Generics?

[GHC]

#1033: ghc-6.7: panic! (the 'impossible' happened) -- typechecker getting confused
by Data.Generics?
----------------------+-----------------------------------------------------
 Reporter:  int-e     |          Owner:         
     Type:  bug       |         Status:  closed 
 Priority:  normal    |      Milestone:         
Component:  Compiler  |        Version:  6.7    
 Severity:  normal    |     Resolution:  fixed  
 Keywords:            |     Difficulty:  Unknown
 Testcase:  tc220     |   Architecture:  Unknown
       Os:  Unknown   |  
----------------------+-----------------------------------------------------
Changes (by simonpj):

  * resolution:  => fixed
  * testcase:  => tc220
  * status:  new => closed

Comment:

 Good bugs, thank you; it exposed bogosity in my work on implication
 constraints, now fixed.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1033>
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