[GHC] #14887: Explicitly quantifying a kind variable causes a type family to fail to typecheck

[GHC]

#14887: Explicitly quantifying a kind variable causes a type family to fail to
typecheck
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        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.2
  checker)                           |             Keywords:  TypeFamilies,
      Resolution:                    |  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 That patch is held up on the #12919 patch, which is under review at
 Phab:D4451.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14887#comment:4>
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