[GHC] #2664: type family + data family + typeclass + type error causes GHC to diverge

[GHC]

#2664: type family + data family + typeclass + type error causes GHC to diverge
------------------------------+---------------------------------------------
 Reporter:  ryani             |          Owner:  chak            
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Milestone:  6.10 branch     
Component:  Compiler          |        Version:  6.11            
 Severity:  normal            |     Resolution:                  
 Keywords:                    |     Difficulty:  Unknown         
 Testcase:                    |   Architecture:  Unknown/Multiple
       Os:  Unknown/Multiple  |  
------------------------------+---------------------------------------------
Changes (by igloo):

  * milestone:  6.10.1 => 6.10 branch

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2664#comment:4>
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