[GHC] #7911: The following code makes ghc panic

[GHC]

#7911: The following code makes ghc panic
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Reporter:  guest             |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Compiler        
 Version:  7.4.2             |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
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Comment(by guest):

 (I have the code in a file, and am merely trying to load it into ghci with
 the default settings)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7911#comment:1>
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