[GHC] #7578: Instance selection regression from 7.4 to 7.6

[GHC]

#7578: Instance selection regression from 7.4 to 7.6
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  Reporter:  nomeata                  |          Owner:                  
      Type:  bug                      |         Status:  closed          
  Priority:  normal                   |      Milestone:                  
 Component:  Compiler (Type checker)  |        Version:  7.6.1           
Resolution:  invalid                  |       Keywords:                  
        Os:  Unknown/Multiple         |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown             |     Difficulty:  Unknown         
  Testcase:                           |      Blockedby:                  
  Blocking:                           |        Related:                  
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Comment(by nomeata):

 Thanks for the clear explanation. I linked it from the SE post so that it
 will enlighten more Haskellers.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7578#comment:2>
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