[GHC] #12088: Type/data family instances in kind checking

[GHC]

#12088: Type/data family instances in kind checking
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        Reporter:  alexvieth         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11348, #12239    |  Differential Rev(s):  Phab:D2272
       Wiki Page:                    |
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Comment (by goldfire):

 I'm not convinced that comment:17 is the same bug here. That, to me, looks
 like a bug in the resolution to #11348. Doing the major rewrite I propose
 in comment:13 and comment:15 may likely help, but there's a good chance
 comment:17 could be fixed with much less effort.

 Alex, you're the expert here. What do you think?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12088#comment:21>
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