[GHC] #9200: Milner-Mycroft failure at the kind level

[GHC]

#9200: Milner-Mycroft failure at the kind level
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        Reporter:  ekmett                     |            Owner:
            Type:  bug                        |           Status:  new
        Priority:  normal                     |        Milestone:
       Component:  Compiler (Type checker)    |          Version:  7.8.2
      Resolution:                             |         Keywords:
Operating System:  Unknown/Multiple           |     Architecture:
 Type of failure:  GHC rejects valid program  |  Unknown/Multiple
       Test Case:                             |       Difficulty:  Unknown
        Blocking:                             |       Blocked By:
                                              |  Related Tickets:
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Comment (by dolio):

 Having conferred with Ed, I guess GHC uses a different strategy that
 doesn't involve (proper) skolem variables, so it might not be subject to
 my complaint. Using some kind of after-the-fact distinctness check instead
 of proper skolems seems not to arbitrarily rule out certain definitions in
 a confusing manner, which was my main concern.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9200#comment:13>
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