[GHC] #11966: Surprising behavior with higher-rank quantification of kind variables

[GHC]

#11966: Surprising behavior with higher-rank quantification of kind variables
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        Reporter:  ocharles          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.0.1-rc3
  checker)                           |
      Resolution:                    |             Keywords:  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 RyanGlScott):

 Luckily, commit a7ee2d4c4229b27af324ebac93081f692835365d (Improve
 TcFlatten.flattenTyVar) fixed this! I'll add a regression test.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11966#comment:1>
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