[GHC] #12725: T7037 is broken on Windows

[GHC]

#12725: T7037 is broken on Windows
---------------------------------+--------------------------------------
        Reporter:  bgamari       |                Owner:
            Type:  bug           |               Status:  new
        Priority:  normal        |            Milestone:  8.2.1
       Component:  Compiler      |              Version:  8.1
      Resolution:                |             Keywords:
Operating System:  Windows       |         Architecture:  x86_64 (amd64)
 Type of failure:  None/Unknown  |            Test Case:
      Blocked By:                |             Blocking:
 Related Tickets:                |  Differential Rev(s):
       Wiki Page:                |
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Comment (by bgamari):

 Unfortunately my naive attempt at a minimal reproduction case failed,
 {{{#!bash
 $ cat >test.py <<EOF
 import subprocess

 while True:
     p = subprocess.Popen('./test.exe', stdout=subprocess.PIPE,
 stderr=subprocess.PIPE)
     (out,err) = p.communicate()
     assert p.wait() == 0
     assert out == 'hi\r\n'
     assert err == ''
 EOF
 $ cat >test.c <<EOF
 #include <stdio.h>
 int main() {
     printf("hi\n");
     return 0;
 }
 EOF
 $ gcc -o test.exe test.c
 $ python test.py
 }}}
 Never seems to fail.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12725#comment:3>
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