[GHC] #4178: Lazy evaluation of type families causes quantified type variables to escape

[GHC]

#4178: Lazy evaluation of type families causes quantified type variables to escape
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  Reporter:  intoverflow                         |          Owner:                  
      Type:  bug                                 |         Status:  closed          
  Priority:  normal                              |      Milestone:  7.0.1           
 Component:  Compiler (Type checker)             |        Version:  6.12.1          
Resolution:  fixed                               |       Keywords:                  
  Testcase:  indexed-types/should_compile/T4178  |      Blockedby:  4232            
Difficulty:                                      |             Os:  Unknown/Multiple
  Blocking:                                      |   Architecture:  Unknown/Multiple
   Failure:  GHC rejects valid program           |  
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Changes (by simonpj):

  * status:  new => closed
  * testcase:  => indexed-types/should_compile/T4178
  * resolution:  => fixed


Comment:

 Great.  Both `hasTrouble` and `hasNoTrouble` are fine now.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4178#comment:3>
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