[GHC] #10586: GHC 7.10.1 panic due to wildcard in data family instance

[GHC]

#10586: GHC 7.10.1 panic due to wildcard in data family instance
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        Reporter:  WrenThornton      |                   Owner:  thomasw
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #3699             |  Differential Revisions:  Phab:D1092
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Comment (by thomasw):

 See Phab:D1092 for a patch adding support for wild cards in type/data
 family instance declarations.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10586#comment:12>
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