[GHC] #9516: unsafeUnmask unmasks even inside uninterruptibleMask

[GHC]

#9516: unsafeUnmask unmasks even inside uninterruptibleMask
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              Reporter:  edsko       |            Owner:  simonmar
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Runtime     |          Version:  7.8.2
  System                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D181   |
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Changes (by thoughtpolice):

 * differential:   => Phab:D181


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9516#comment:2>
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