[GHC] #15584: nonVoid is too conservative w.r.t. strict argument types

[GHC]

#15584: nonVoid is too conservative w.r.t. strict argument types
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
                                     |  PatternMatchWarnings
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  error/warning at compile-time      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15305            |  Differential Rev(s):  Phab:D5116
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * status:  new => patch
 * differential:   => Phab:D5116


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15584#comment:1>
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