[GHC] #16150: Data races in itimer_thread_func reported by ThreadSanitizer

[GHC]

#16150: Data races in itimer_thread_func reported by ThreadSanitizer
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        Reporter:  gnezdo            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.4.4
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Incorrect result  |  (amd64)
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Ahhh, I think we have actually seen this in manifest in practice in fact
 (in CI).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16150#comment:1>
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