[GHC] #11524: Something is amiss with quantification in pattern synonym type signatures

[GHC]

#11524: Something is amiss with quantification in pattern synonym type signatures
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        Reporter:  bgamari           |                Owner:
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.0.1
       Component:  Compiler (Type    |              Version:  8.0.1-rc1
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1879
       Wiki Page:                    |
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Comment (by goldfire):

 NB: niteria's (quite necessary) patch does not fix the main issue reported
 up top. When that patch is merged, we still can't close this ticket.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11524#comment:5>
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