[GHC] #8884: Reifying closed type families is broken

[GHC]

#8884: Reifying closed type families is broken
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        Reporter:  goldfire          |            Owner:  goldfire
            Type:  bug               |           Status:  merge
        Priority:  normal            |        Milestone:  7.8.1
       Component:  Template Haskell  |          Version:  7.8.1-rc2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:  th/T8884          |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by carter):

 how would they even use the incorrect behavior constructively?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8884#comment:4>
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