[GHC] #15801: "ASSERT failed!" with visible kind applications

[GHC]

#15801: "ASSERT failed!" with visible kind applications
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        Reporter:  Iceland_jack      |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.1
      Resolution:                    |             Keywords:
                                     |  TypeApplications
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Iceland_jack):

 Can also be triggered with

 {{{
 >> :t coerce @(Y @Type _ _)
 *** Exception: ASSERT failed! file compiler/typecheck/TcFlatten.hs, line
 1285
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15801#comment:1>
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