[GHC] #14273: Typed holes' "valid substitutions" suggestions are oblivious to type class constraints

[GHC]

#14273: Typed holes' "valid substitutions" suggestions are oblivious to type class
constraints
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        Reporter:  RyanGlScott       |                Owner:  Tritlo
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler (Type    |              Version:  8.3
  checker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9091, #9479      |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by vanto):

 Thank you very much. It is a matter of point of view. If I drive on a
 road I know with my car, I do not operate the GPS. I do not have to
 listen to the details of the road. I think it makes sense. But I also
 have the choice of putting it into operation. So if I had the same
 possibility with the compiler about Typed Holes, then it would be
 perfect. No proposal for that.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14273#comment:16>
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