[GHC] #3927: Incomplete/overlapped pattern warnings + GADTs = inadequate

[GHC]

#3927: Incomplete/overlapped pattern warnings + GADTs = inadequate
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        Reporter:  simonpj           |            Owner:  simonpj
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:  7.8.3
       Component:  Compiler          |          Version:  6.12.1
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #4139
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Comment (by simonpj):

 Yes, I think it's the same thing, though this time you have do some type-
 family rewrites too, to see that the patterns are exhaustive.

 Simon

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3927#comment:33>
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