[GHC] #11428: ImpredicativeTypes causes GHC panic with 8.0.1-rc1

[GHC]

#11428: ImpredicativeTypes causes GHC panic with 8.0.1-rc1
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        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc1
  checker)                           |             Keywords:
      Resolution:                    |  ImpredicativeTypes,
                                     |  TypeApplications
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Hopefully my work (Phab:D1777 is an unfinished checkpoint) toward #11397
 will nab this as well.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11428#comment:2>
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