[GHC] #2851: Deriving doesn't work when type families are involved

[GHC]

#2851: Deriving doesn't work when type families are involved
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 Reporter:  guest             |          Owner:                  
     Type:  feature request   |         Status:  new             
 Priority:  normal            |      Milestone:                  
Component:  Compiler          |        Version:  6.10.1          
 Severity:  minor             |     Resolution:                  
 Keywords:                    |       Testcase:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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Changes (by guest):

 * cc: lennart at augustsson.net (added)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2851#comment:1>
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