[GHC] #4448: Another case of SpecConstr not specialising

[GHC]

#4448: Another case of SpecConstr not specialising
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    Reporter:  rl                |        Owner:                         
        Type:  bug               |       Status:  new                    
    Priority:  normal            |    Milestone:  7.0.2                  
   Component:  Compiler          |      Version:  7.1                    
    Keywords:                    |     Testcase:                         
   Blockedby:                    |   Difficulty:                         
          Os:  Unknown/Multiple  |     Blocking:                         
Architecture:  Unknown/Multiple  |      Failure:  Runtime performance bug
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Comment(by rl):

 `ForceSpecConstr` doesn't affect the "taking apart" requirement at the
 moment. It probably should, though. I'll send a patch.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4448#comment:3>
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