[GHC] #9867: PatternSynonyms + ScopedTypeVariables triggers an internal error

[GHC]

#9867: PatternSynonyms + ScopedTypeVariables triggers an internal error
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        Reporter:  antalsz           |                   Owner:  cactus
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler (Type    |                 Version:  7.8.3
  checker)                           |                Keywords:
      Resolution:                    |  PatternSynonyms
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"4cfd235d4d52ce6e6c48013b2d5dcb347b978c24/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="4cfd235d4d52ce6e6c48013b2d5dcb347b978c24"
 Test Trac #9867
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9867#comment:7>
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