[GHC] #12719: master branch broken with alex 3.2

[GHC]

#12719: master branch broken with alex 3.2
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        Reporter:  bgamari           |                Owner:  bgamari
            Type:  task              |               Status:  upstream
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * status:  new => upstream
 * cc: simonmar (added)


Comment:

 See https://github.com/simonmar/alex/issues/98.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12719#comment:1>
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