[GHC] #8384: -fwarn-empty-enumerations doesn't work with -fhpc

[GHC]

#8384: -fwarn-empty-enumerations doesn't work with -fhpc
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       Reporter:  rwbarton          |             Owner:
           Type:  bug               |            Status:  new
       Priority:  low               |         Milestone:
      Component:  Compiler          |           Version:  7.7
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 It appears that tick insertion occurs before arithmetic sequences are
 desugared, so `warnAboutEmptyEnumerations` can't see the calls to
 `fromInteger`, because they have been wrapped in ticks already.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8384>
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