[GHC] #3423: No match in record selector Var.tcTyVarDetails with ghc >= 6.10.2

[GHC]

#3423: No match in record selector Var.tcTyVarDetails with ghc >= 6.10.2
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 Reporter:  morrow            |          Owner:                  
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Milestone:                  
Component:  Compiler          |        Version:  6.10.4          
 Severity:  normal            |     Resolution:                  
 Keywords:                    |       Testcase:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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Comment (by morrow):

 Actually, looking at that i guess the type family aspect is probably
 irrelevant. (?)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3423#comment:2>
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