[GHC] #7194: Typechecker allows a skolem to escapt

[GHC]

#7194: Typechecker allows a skolem to escapt
-------------------------------+--------------------------------------------
  Reporter:  simonpj           |          Owner:                  
      Type:  bug               |         Status:  closed          
  Priority:  normal            |      Milestone:                  
 Component:  Compiler          |        Version:  7.4.2           
Resolution:  fixed             |       Keywords:                  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown      |     Difficulty:  Unknown         
  Testcase:  T7194             |      Blockedby:                  
  Blocking:                    |        Related:                  
-------------------------------+--------------------------------------------
Changes (by igloo):

  * testcase:  => T7194


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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7194#comment:2>
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