[GHC] #15361: Error message displays redundant equality constraint

[GHC]

#15361: Error message displays redundant equality constraint
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler (Type    |              Version:  8.4.3
  checker)                           |
      Resolution:                    |             Keywords:  TypeInType
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14394            |  Differential Rev(s):  Phab:D5002
       Wiki Page:                    |
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Comment (by RyanGlScott):

 Replying to [comment:7 simonpj]:
 > I suppose, therefore, that the solution you suggest is no unreasonable,
 ''provided'' you write Note to explain.

 Sure thing. I've updated Phab:D5002.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15361#comment:8>
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