[GHC] #10495: Poor error message for Coercible constraint unsatisfiability

[GHC]

#10495: Poor error message for Coercible constraint unsatisfiability
-------------------------------------+-------------------------------------
        Reporter:  goldfire          |                   Owner:  goldfire
            Type:  bug               |                  Status:  merge
        Priority:  normal            |               Milestone:  7.10.3
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
                                     |  typecheck/should_fail/T10495
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by bgamari):

 * version:  7.11 => 7.10.1


Comment:

 The reference to untouchable variables appeared in 7.10.1.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10495#comment:5>
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