[GHC] #12922: Kind classes compile with PolyKinds

[GHC]

#12922: Kind classes compile with PolyKinds
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        Reporter:  Tritlo            |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by goldfire):

 * owner:   => goldfire


Comment:

 But look at the OP's

 {{{
 class Addable k where
   type (a :: k) + (b :: k) :: k
 }}}

 where the class variable `k` is used as a kind. This indeed should not be
 allowed unless `TypeInType` is on. I'll put this in my queue.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12922#comment:6>
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