[GHC] #15385: -Wincomplete-patterns gets confused when combining GADTs and pattern guards

[GHC]

#15385: -Wincomplete-patterns gets confused when combining GADTs and pattern guards
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
                                     |  PatternMatchWarnings
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  pmcheck/should_compile/T15385
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4968
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * testcase:   => pmcheck/should_compile/T15385
 * status:  patch => merge


Comment:

 This fixes a pretty serious incompleteness in the pattern-match coverage
 checker, so I'd humbly request that the commits in comment:9 and
 comment:10 be merged to 8.6.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15385#comment:11>
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