[GHC] #9756: Warn about unnecessary unsafeCoerce

[GHC]

#9756: Warn about unnecessary unsafeCoerce
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        Reporter:  dfeuer            |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler (Type    |              Version:  7.9
  checker)                           |
      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 Rev(s):
       Wiki Page:                    |
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Changes (by dfeuer):

 * priority:  normal => low


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9756#comment:5>
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