[GHC] #9222: Unexpected DataKind Panic

[GHC]

#9222: Unexpected DataKind Panic
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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:  None/Unknown             |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by ekmett):

 If I fix up the quantifiers then the panic goes away, but the 'impossible'
 shouldn't happen, nonetheless. ;)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9222#comment:1>
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