[GHC] #10930: missing empty-Enumeration and out-of-range warning for `Natural`

[GHC]

#10930: missing empty-Enumeration and out-of-range warning for `Natural`
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        Reporter:  hvr               |                Owner:  hvr
            Type:  bug               |               Status:  patch
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #7881, #10929     |  Differential Rev(s):  Phab:D1306,
       Wiki Page:                    |  Phab:D5181
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Changes (by harpocrates):

 * status:  new => patch
 * differential:  Phab:D1306 => Phab:D1306, Phab:D5181


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10930#comment:7>
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