[GHC] #7541: Unavoidable duplicate constraint warning

[GHC]

#7541: Unavoidable duplicate constraint warning
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  Reporter:  blamario                           |          Owner:                  
      Type:  bug                                |         Status:  closed          
  Priority:  normal                             |      Milestone:                  
 Component:  Compiler                           |        Version:  7.6.1           
Resolution:  fixed                              |       Keywords:                  
        Os:  Unknown/Multiple                   |   Architecture:  Unknown/Multiple
   Failure:  Incorrect warning at compile-time  |     Difficulty:  Unknown         
  Testcase:  typecheck/should_compile/T7541     |      Blockedby:                  
  Blocking:                                     |        Related:                  
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Changes (by simonpj):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => fixed
  * testcase:  => typecheck/should_compile/T7541


Comment:

 OK I've added a flag to suppress duplicate constraint warnings.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7541#comment:2>
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