[GHC] #10347: Spurious "unused constructor" warning with Coercible

[GHC]

#10347: Spurious "unused constructor" warning with Coercible
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        Reporter:  goldfire          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by goldfire):

 * owner:  goldfire =>


Comment:

 In that case, I'm forgoing ownership of the ticket. Perhaps once my branch
 is merged, I'll have the energy to look at a redesign of the whole
 `DefUse` thing, but not now.

 In any case, this only happened while building a test case -- not in "real
 code" -- so I don't think it's too important.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10347#comment:5>
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