[GHC] #10114: Kind mismatches with AnyK in rank-2 types

[GHC]

#10114: Kind mismatches with AnyK in rank-2 types
-------------------------------------+-------------------------------------
        Reporter:  cam               |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by simonpj):

 Current BUG (HEAD, 7.10)
 {{{
 type T = forall (f :: k -> k2) (a::k). f a
 }}}
 Compile with `-fprint-explicit-kinds -ddump-types -XRankNTypes
 -XPolyKinds`
 {{{
 TYPE CONSTRUCTORS
   type T (k2 :: BOX) =
     forall (k :: BOX) (k1 :: BOX) (f :: k -> k1) (a :: k). f a
 }}}
 But this elaborated `T` simply doesn't have a sensible kind.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10114#comment:10>
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