[GHC] #2535: Bug fix for QuickCheck 1.1.0.0

[GHC]

#2535: Bug fix for QuickCheck 1.1.0.0
-------------------------+--------------------------------------------------
    Reporter:  patperry  |       Owner:                
        Type:  proposal  |      Status:  new           
    Priority:  normal    |   Component:  libraries/base
     Version:  6.8.3     |    Severity:  normal        
    Keywords:            |    Testcase:                
Architecture:  Multiple  |          Os:  Multiple      
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 There is currently a bug in "variant" that manifests itself in the
 coarbitrary function for Double and Float.  It has been previously
 reported here:

 http://hackage.haskell.org/trac/ghc/ticket/2065

 The attached patch fixes the problem.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2535>
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