[GHC] #14143: forkProcess leaks file descriptors

[GHC]

#14143: forkProcess leaks file descriptors
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        Reporter:  danharaj          |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  POSIX             |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 I agree with Sven; `forkProcess` is (sadly) essentially impossible to
 support robustly. I have tried quite hard to use it in my own projects in
 the past but ultimately gave up due to similar issues (or rather, even
 worse: a program with multiple Haskell threads writing to `stdout` may
 deadlock after fork as a thread has taken the `Handle`'s `MVar` at the
 time that `forkProcess` killed the holding thread).

 tl;dr: `forkProcess` is a can of worms which introduces a number of
 essentially unsolvable problems. Avoid it at all costs.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14143#comment:2>
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