[GHC] #9722: ghcirun004 intermittently fails with ghc: ioManagerWakeup: write: Bad file descriptor

[GHC]

#9722: ghcirun004 intermittently fails with ghc: ioManagerWakeup: write: Bad file
descriptor
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                   Owner:  simonmar
            Type:  bug               |                  Status:  patch
        Priority:  high              |               Milestone:  7.10.1
       Component:  Runtime System    |                 Version:  7.9
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Runtime crash     |  Unknown/Multiple
      Blocked By:                    |               Test Case:  ghcirun004
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D714
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Comment (by thomie):

 I am on 64 bit Ubuntu 14.04. I can reproduce with `ghc-7.10.0.20150307`
 and `ghc-7.11.20150307` from
 https://launchpad.net/~hvr/+archive/ubuntu/ghc (ghc-head).

 I have attached the output from running `./T9722 +RTS -I0.0001 -Ds`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9722#comment:22>
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