[GHC] #10639: Optimization changes concurrent program's behaviour

[GHC]

#10639: Optimization changes concurrent program's behaviour
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        Reporter:  gizmo.mk0         |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Windows           |            Architecture:  x86_64
 Type of failure:  Incorrect result  |  (amd64)
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by slyfox):

 * cc: slyfox (added)


Comment:

 It's a result of cooperative multitasking in ghc: Trac #367

 In short: non-allocating threads can starve other threads, can be worked-
 around by -fno-omit-yields

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10639#comment:2>
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