[GHC] #5224: Improve consistency checking for family instances

[GHC]

#5224: Improve consistency checking for family instances
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    Reporter:  simonpj           |        Owner:                              
        Type:  bug               |       Status:  new                         
    Priority:  highest           |    Milestone:  7.2.1                       
   Component:  Compiler          |      Version:  7.0.3                       
    Keywords:                    |     Testcase:                              
   Blockedby:                    |   Difficulty:                              
          Os:  Unknown/Multiple  |     Blocking:                              
Architecture:  Unknown/Multiple  |      Failure:  Compile-time performance bug
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Changes (by simonpj):

 * cc: chak@… (added)


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5224#comment:5>
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