[GHC] #10625: Spurious unused quantified type variable warning with ExistentialQuantification

[GHC]

#10625: Spurious unused quantified type variable warning with
ExistentialQuantification
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.10.1
  checker)                           |             Keywords:
      Resolution:  fixed             |  ExistentialQuantification
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #5331             |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 I can't reproduce this anymore on GHC 8.1.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10625#comment:2>
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