[GHC] #7553: ghc fails to terminate with -O2 or greater

[GHC]

#7553: ghc fails to terminate with -O2 or greater
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    Reporter:  erikd             |       Owner:                    
        Type:  bug               |      Status:  new               
    Priority:  normal            |   Milestone:                    
   Component:  Compiler          |     Version:  7.6.1             
    Keywords:                    |          Os:  Unknown/Multiple  
Architecture:  Unknown/Multiple  |     Failure:  Compile-time crash
  Difficulty:  Unknown           |    Testcase:                    
   Blockedby:                    |    Blocking:                    
     Related:                    |  
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Comment(by monoidal):

 I am almost sure this is a duplicate of #5550.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7553#comment:7>
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