[GHC] #4358: infinite loop on unification with a type family context

[GHC]

#4358: infinite loop on unification with a type family context
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  Reporter:  patrick_premont                     |          Owner:                                   
      Type:  bug                                 |         Status:  closed                           
  Priority:  normal                              |      Milestone:                                   
 Component:  Compiler (Type checker)             |        Version:  7.1                              
Resolution:  fixed                               |       Keywords:  infinite loop type family context
  Testcase:  indexed-types/should_compile/T4358  |      Blockedby:                                   
Difficulty:                                      |             Os:  Windows                          
  Blocking:                                      |   Architecture:  x86_64 (amd64)                   
   Failure:  Compile-time crash                  |  
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Changes (by simonpj):

  * status:  new => closed
  * testcase:  => indexed-types/should_compile/T4358
  * resolution:  => fixed


Comment:

 Thanks for the example.  This seems comprehensively fixed by the latest
 wave of typechecker fixes.

 I've added a regression test though!

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4358#comment:2>
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