[GHC] #4139: Spurious non-exhaustive pattern match warnings are given using GADTs

[GHC]

#4139: Spurious non-exhaustive pattern match warnings are given using GADTs
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        Reporter:  blarsen           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.4.1
      Resolution:                    |         Keywords:  GADTs, warnings,
Operating System:  Unknown/Multiple  |  pattern matching
 Type of failure:  Incorrect         |     Architecture:  Unknown/Multiple
  warning at compile-time            |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #3927
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Changes (by ezyang):

 * milestone:  7.0.1 =>


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4139#comment:8>
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