[GHC] #11984: Pattern match incompleteness / inaccessibility discrepancy

[GHC]

#11984: Pattern match incompleteness / inaccessibility discrepancy
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        Reporter:  goldfire          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
                                     |  PatternMatchWarnings
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #14098            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 I often find myself working in `Check` and `Match`, and I'd certainly like
 to address some of these pattern match coverage check-oriented tickets
 some day. But I often find myself handicapped by my unfamiliarity with the
 structure of the code in that part of GHC, so I think that in order to
 productively maintain it, I'd need someone to give a tour of that section
 of the codebase, highlighting what each thing does. (I've read "GADTs meet
 their match", but that doesn't really come with a field guide as to how
 each concept translates to actual GHC code.)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11984#comment:5>
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