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

[GHC]

#9867: PatternSynonyms + ScopedTypeVariables triggers an internal error
-------------------------------------+-------------------------------------
        Reporter:  antalsz           |                   Owner:  cactus
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler (Type    |                 Version:  7.8.3
  checker)                           |                Keywords:
      Resolution:  fixed             |  PatternSynonyms
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |               Test Case:
      Blocked By:                    |  patsyn/should_compile/T9867
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thoughtpolice):

 * status:  merge => closed
 * resolution:   => fixed
 * milestone:   => 7.12.1


Comment:

 I don't think this can be easily merged to `ghc-7.10` because I think it's
 dependent on 32973bf3c2f6fe00e01b44a63ac1904080466938, which I'm not keen
 on merging. So I'm going to drop this one to 7.12 instead.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9867#comment:9>
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