[GHC] #6002: GHC 7.4+ thinks class instance is incoherent, 7.0.4 disagrees

[GHC]

#6002: GHC 7.4+ thinks class instance is incoherent, 7.0.4 disagrees
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  Reporter:  heisenbug                  |          Owner:                  
      Type:  bug                        |         Status:  closed          
  Priority:  normal                     |      Milestone:                  
 Component:  Compiler                   |        Version:  7.4.1           
Resolution:  fixed                      |       Keywords:                  
        Os:  Unknown/Multiple           |   Architecture:  Unknown/Multiple
   Failure:  GHC rejects valid program  |     Difficulty:  Unknown         
  Testcase:  polykinds/T6002            |      Blockedby:                  
  Blocking:                             |        Related:                  
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Changes (by simonpj):

  * status:  new => closed
  * testcase:  => polykinds/T6002
  * resolution:  => fixed


Comment:

 I've added a test that `-XIncoherentInstances` makes the code be accepted,
 so I'll close the ticket.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6002#comment:5>
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