[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:  chak  
     Type:  bug                             |         Status:  new   
 Priority:  normal                          |      Milestone:        
Component:  Compiler                        |        Version:  6.10.4
 Severity:  normal                          |     Resolution:        
 Keywords:  deriving instance, type family  |       Testcase:        
       Os:  Linux                           |   Architecture:  x86   
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Comment (by chak):

 Duplicate of #3423

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3422#comment:3>
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