[GHC] #15675: Type operators in existential context cannot be parsed

[GHC]

#15675: Type operators in existential context cannot be parsed
-------------------------------------+-------------------------------------
        Reporter:  int-index         |                Owner:  int-index
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.4.3
  (Parser)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHC rejects       |            Test Case:
  valid program                      |  parser/should_compile/T15675
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D5180
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 Thanks for doing this Vladislav.

 I think you plan to nail #1087 in the same way, which would be even
 better.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15675#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler