[GHC] #15592: Type families without CUSKs cannot be given visible kind variable binders

[GHC]

#15592: Type families without CUSKs cannot be given visible kind variable binders
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
                                     |  TypeApplications, TypeFamilies,
                                     |  CUSKs
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:  14880             |             Blocking:
 Related Tickets:  #15591            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 After the commit in comment:15, the program from comment:9:

 {{{#!hs
 class C a where
   type T (x :: (f :: k -> Type) a)
 }}}

 Now typechecks again. There doesn't appear to be a test case for this,
 however. Worth checking in?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15592#comment:16>
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