[GHC] #13365: Notify user when adding a CUSK might help fix a type error (was: Kind-inference for poly-kinded GADTs)

[GHC]

#13365: Notify user when adding a CUSK might help fix a type error
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        Reporter:  crockeea          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  TypeInType,
                                     |  CUSKs
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14139, #14207    |  Differential Rev(s):
       Wiki Page:                    |
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13365#comment:9>
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