[GHC] #4174: Jumbled error message from type family operator

[GHC]

#4174: Jumbled error message from type family operator
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    Reporter:  lilac                    |        Owner:                                   
        Type:  bug                      |       Status:  new                              
    Priority:  normal                   |    Milestone:                                   
   Component:  Compiler (Type checker)  |      Version:  6.12.1                           
    Keywords:                           |   Difficulty:                                   
          Os:  Unknown/Multiple         |     Testcase:                                   
Architecture:  Unknown/Multiple         |      Failure:  Incorrect warning at compile-time
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Comment(by simonpj):

 I agree. Thank you for the test case.  Will look at it when the new type
 inference machinery is done.  Weeks not months I hope.

 Simon

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4174#comment:1>
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