[GHC] #4120: Iface type variable out of scope in cast

[GHC]

#4120: Iface type variable out of scope in cast
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    Reporter:  benl                     |        Owner:                         
        Type:  bug                      |       Status:  new                    
    Priority:  high                     |    Milestone:  6.14.1                 
   Component:  Compiler (Type checker)  |      Version:  6.13                   
    Keywords:                           |   Difficulty:                         
          Os:  Unknown/Multiple         |     Testcase:                         
Architecture:  Unknown/Multiple         |      Failure:  Runtime performance bug
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Changes (by igloo):

  * priority:  normal => high
  * milestone:  => 6.14.1


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4120#comment:1>
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