[GHC] #8985: Strange kind error with type family, GADTs, data kinds, and kind polymorphism

[GHC]

#8985: Strange kind error with type family, GADTs, data kinds, and kind
polymorphism
----------------------------------------------+----------------------------
        Reporter:  kosmikus                   |            Owner:
            Type:  bug                        |           Status:  merge
        Priority:  normal                     |        Milestone:
       Component:  Compiler (Type checker)    |          Version:  7.8.1
      Resolution:                             |         Keywords:
Operating System:  Unknown/Multiple           |     Architecture:
 Type of failure:  GHC rejects valid program  |  Unknown/Multiple
       Test Case:  polykinds/T8985            |       Difficulty:  Unknown
        Blocking:                             |       Blocked By:
                                              |  Related Tickets:
----------------------------------------------+----------------------------
Changes (by simonpj):

 * status:  new => merge
 * testcase:   => polykinds/T8985


Comment:

 Great catch, thank you.

 Merge to 7.8.3.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8985#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler