[GHC] #14547: Wrong warning by -Wincomplete-patterns

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Fri May 4 15:18:53 UTC 2018


#14547: Wrong warning by -Wincomplete-patterns
-------------------------------------+-------------------------------------
        Reporter:  YoshikuniJujo     |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  incomplete-
                                     |  patterns OverloadedLists,
                                     |  PatternMatchWarnings TypeFamilies
Operating System:  Linux             |         Architecture:  x86
 Type of failure:  Incorrect         |            Test Case:
  error/warning at compile-time      |  deSugar/should_compile/T14547
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4624
       Wiki Page:                    |
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Comment (by sighingnow):

 Replying to [comment:10 simonpj]:

 I misread your previous comment, my bad.

 > Bottom line: check for `NoRebindableSyntax`!

 I have revised the Phab:D4624. Now when `RebindableSyntax` is enabled we
 treat the overloaded list pattern as ordinary view pattern. I have added
 some comments about this problem.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14547#comment:11>
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