[GHC] #10428: GHC cannot match representations using Coercible constraint

[GHC]

#10428: GHC cannot match representations using Coercible constraint
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        Reporter:  crockeea          |                   Owner:  goldfire
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by goldfire):

 comment:2 really shouldn't happen. That one surprises me.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10428#comment:3>
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