[New-bugs-announce] [issue12786] subprocess wait() hangs when stdin is closed

[Idan Kamara]

New submission from Idan Kamara <idankk86 at gmail.com>:

The following program hangs on Debian, Python 2.6.6:

import subprocess

proc1 = subprocess.Popen(['cat'], stdin=subprocess.PIPE)
proc2 = subprocess.Popen(['cat'], stdin=subprocess.PIPE)

proc1.stdin.close()
proc1.wait()

Changing the last two lines to:

proc2.stdin.close()
proc2.wait()

Doesn't hang. The guys at #python-dev confirmed the same happens on 2.7 but not on 3.x.

----------
components: Library (Lib)
messages: 142475
nosy: Idan.Kamara
priority: normal
severity: normal
status: open
title: subprocess wait() hangs when stdin is closed
type: resource usage
versions: Python 2.6, Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12786>
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