[GHC] #12564: Type family in type pattern kind

[GHC]

#12564: Type family in type pattern kind
-------------------------------------+-------------------------------------
        Reporter:  int-index         |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.0.1
  checker)                           |             Keywords:  TypeInType,
      Resolution:                    |  TypeFamilies
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:  14119             |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by goldfire):

 A fix for this ticket may also fix #15905. Well, at least the older plan,
 before comment:12.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12564#comment:16>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler