[GHC] #7458: ghc panic

[GHC]

#7458: ghc panic
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Reporter:  timsears            |          Owner:          
    Type:  bug                 |         Status:  new     
Priority:  normal              |      Component:  Compiler
 Version:  7.4.1               |       Keywords:          
      Os:  Linux               |   Architecture:  x86     
 Failure:  Compile-time crash  |      Blockedby:          
Blocking:                      |        Related:          
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Comment(by timsears):

 I should be clear. This happened while I was tracking down a bug involving
 overlapping instances in MY code.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7458#comment:1>
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