[GHC] #15995: Make Control.Concurrent.QSem a newtype

[GHC]

#15995: Make Control.Concurrent.QSem a newtype
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        Reporter:  chessai           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  8.6.2
      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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Comment (by Ben Gamari <ben@…>):

 In [changeset:"f5e98bb31cf4dae740c8dc598ef207aa79d5a179/ghc" f5e98bb/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="f5e98bb31cf4dae740c8dc598ef207aa79d5a179"
 make QSem and QSemN newtypes

 Reviewers: RyanGlScott, ekmett, hvr, bgamari

 Reviewed By: bgamari

 Subscribers: rwbarton, carter

 GHC Trac Issues: #15995

 Differential Revision: https://phabricator.haskell.org/D5456
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15995#comment:3>
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