[GHC] #13988: GADT constructor with kind equality constraint quantifies unused existential type variables

[GHC]

#13988: GADT constructor with kind equality constraint quantifies unused
existential type variables
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:  14131
 Related Tickets:                    |  Differential Rev(s):  Phab:D3902
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * differential:  Phab:D3872 => Phab:D3902
 * blocking:   => 14131


Comment:

 I decided to split this off into its own Diff, since it's a somewhat hefty
 patch by itself.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13988#comment:4>
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