[GHC] #5970: Type checker hangs

[GHC]

#5970: Type checker hangs
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    Reporter:  Lemming                  |       Owner:                              
        Type:  bug                      |      Status:  infoneeded                  
    Priority:  normal                   |   Milestone:                              
   Component:  Compiler (Type checker)  |     Version:  7.4.1                       
    Keywords:                           |          Os:  Linux                       
Architecture:  x86                      |     Failure:  Compile-time performance bug
  Difficulty:  Unknown                  |    Testcase:                              
   Blockedby:                           |    Blocking:                              
     Related:                           |  
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Comment(by simonpj):

 But #5978 is a delicate point concerning exactly how a type error is
 reported. It's irrelevant for a type-correct program.  Nor is it a
 performance question.  I don't see how the two are connected.

 We have fixed a lot of performance problems in the type checker recently,
 so it would certainly be worth checking that HEAD still has the bad
 behaviour you experienced.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5970#comment:8>
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