[GHC] #3422: No match in record selector Var.tcTyVarDetails

[GHC]

#3422: No match in record selector Var.tcTyVarDetails
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Reporter:  guest                           |          Owner:          
    Type:  bug                             |         Status:  new     
Priority:  normal                          |      Component:  Compiler
 Version:  6.10.4                          |       Severity:  normal  
Keywords:  deriving instance, type family  |       Testcase:          
      Os:  Linux                           |   Architecture:  x86     
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 See http://hpaste.org/fastcgi/hpaste.fcgi/view?id=7993#a7993

 This also happens on ghc 6.10.4

 KiYungAhn

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3422>
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