[GHC] #5281: Bad compiler warning

[GHC]

#5281: Bad compiler warning
---------------------------------+------------------------------------------
    Reporter:  augustss          |        Owner:  simonpj     
        Type:  bug               |       Status:  new         
    Priority:  high              |    Milestone:  7.2.1       
   Component:  Compiler          |      Version:  7.1         
    Keywords:                    |     Testcase:              
   Blockedby:                    |   Difficulty:              
          Os:  Unknown/Multiple  |     Blocking:              
Architecture:  Unknown/Multiple  |      Failure:  None/Unknown
---------------------------------+------------------------------------------

Comment(by simonpj):

 I'm on this, but it'll have to wait till I'm back from holiday.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5281#comment:3>
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