[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:
           Type:  bug                |                  Status:  new
       Priority:  normal             |               Milestone:
      Component:  GHCi               |                 Version:  7.9
       Keywords:                     |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Unknown            |         Type of failure:  Runtime
     Blocked By:                     |  crash
Related Tickets:                     |               Test Case:  ghcirun004
                                     |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 I was recently repeatedly running the validate test suite and got this
 test to fail:

 {{{
  Actual stderr output differs from expected:
 --- /dev/null   2014-02-15 17:35:19.578872448 -0800
 +++ ./ghci/should_run/ghcirun004.run.stderr     2014-10-24
 14:46:15.289211100 -0700
 @@ -0,0 +1 @@
 +ghc: ioManagerWakeup: write: Bad file descriptor
 *** unexpected failure for ghcirun004(ghci)
 }}}

 Might be related to #5443.

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