[GHC] #9284: shutdownCapability sometimes loops indefinitely on OSX after forkProcess

[GHC]

#9284: shutdownCapability sometimes loops indefinitely on OSX after forkProcess
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        Reporter:  edsko             |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Compiler          |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by AndreasVoellmy):

 I just verified that the bug occurs even if you remove the call to
 `safeFfiFunction 2` in main, and replace it with `return ()`. It takes
 longer to trigger the problem, but it does still occur.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9284#comment:4>
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