[GHC] #15528: Match is missing a Data instance

[GHC]

#15528: Match is missing a Data instance
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        Reporter:  mpickering        |                Owner:  (none)
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:  invalid           |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by mpickering):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 There is actually instances in `HsInstances` but only if `p` is
 instantiated to something specific.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15528#comment:1>
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