[GHC] #1153: panic! "expectJust zonkSigTyVar" while compiling

[GHC]

#1153: panic! "expectJust zonkSigTyVar" while compiling
-----------------------+----------------------------------------------------
 Reporter:  shahn      |          Owner:  simonpj
     Type:  bug        |         Status:  new    
 Priority:  normal     |      Milestone:         
Component:  Compiler   |        Version:  6.6    
 Severity:  normal     |     Resolution:         
 Keywords:             |     Difficulty:  Unknown
 Testcase:  tcfail175  |   Architecture:  x86    
       Os:  Linux      |  
-----------------------+----------------------------------------------------
Changes (by simonpj):

  * testcase:  => tcfail175
  * owner:  => simonpj

Comment:

 I'll take this.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1153>
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