[GHC] #10614: Show constraints in ``Found hole...''

[GHC]

#10614: Show constraints in ``Found hole...''
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        Reporter:  bjmprice          |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by zyla):

 I can work on this.

 If I understand correctly, the needed information is in `ic_given` of
 `Implication` in `cec_encl` of the `ReportErrCtxt`. Is this right?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10614#comment:6>
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