[GHC] #14331: Overzealous free-floating kind check causes deriving clause to be rejected

[GHC]

#14331: Overzealous free-floating kind check causes deriving clause to be rejected
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |
      Resolution:                    |             Keywords:  deriving
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  deriving/should_compile/T14331
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 Ryan is spot on in comment:56 (i.e. this is different to #11732), and also
 in comment:52 (i.e. `deriving( Cat k )` should fail if we really mean
 `deriving( Cat Type )`.

 Ryan this is in your patch, indeed right in the area you have in-flight
 work on.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14331#comment:56>
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