[GHC] #13391: PolyKinds is more permissive in GHC 8

[GHC]

#13391: PolyKinds is more permissive in GHC 8
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        Reporter:  crockeea          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:  newcomer,
                                     |  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC accepts       |  Unknown/Multiple
  invalid program                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 I don't think this is quite so easy. The old check needed to tell the
 difference between types and kinds. We can't do that anymore!

 It is a shame that this happens though. If no one gets there first, I'll
 fix this in my `TypeInType` bug sweep this summer.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13391#comment:3>
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