[GHC] #5817: dph-diophantine-copy-opt fails

[GHC]

#5817: dph-diophantine-copy-opt fails
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    Reporter:  igloo                  |       Owner:  benl            
        Type:  bug                    |      Status:  new             
    Priority:  normal                 |   Milestone:                  
   Component:  Data Parallel Haskell  |     Version:  7.5             
    Keywords:                         |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple       |     Failure:  None/Unknown    
  Difficulty:  Unknown                |    Testcase:                  
   Blockedby:                         |    Blocking:                  
     Related:                         |  
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Comment(by benl):

 I have another example that has started doing this as well, investigating.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5817#comment:1>
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