[GHC] #11699: Type families mistakingly report kind variables as unbound type variables

[GHC]

#11699: Type families mistakingly report kind variables as unbound type variables
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        Reporter:  mniip             |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  8.0.1-rc2
      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 mniip):

 Replying to [comment:1 simonpj]:
 > Richard, this doesn't look hard.
 >
 > I think the program itself is fine.
 So there are no issues with type family equations introducing new kind
 variables?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11699#comment:3>
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