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I don't know a lot about the matter at hand, that's why I'm not gonna
append a patch.
On "_communicate()" after a pipe is read it's closed, doing the same on
"communicate()" seems to solve the issue of the extra pipe:
"""
 if [self.stdin, self.stdout, self.stderr].count(None) >= 2:
 stdout = None
 stderr = None
 if self.stdin:
 if input:
 self.stdin.write(input)
 self.stdin.close()
 elif self.stdout:
 stdout = self.stdout.read()
+ self.stdout.close()
 elif self.stderr:
 stderr = self.stderr.read()
+ self.stderr.close()
 self.wait()
 return (stdout, stderr)
"""
Tested on "Python 2.6a2+ (trunk:62767M, May 19 2008, 13:11:07)".