[New-bugs-announce] [issue22697] Deadlock with writing to stderr from forked process

[Maries Ionel Cristian]

New submission from Maries Ionel Cristian:

Example code:

import os
import sys
import threading


def run():
    sys.stderr.write("in parent thread\n")

threading.Thread(target=run).start()
pid = os.fork()
if pid:
    os.waitpid(pid, 0)
else:
    sys.stderr.write("in child\n")


To run:  while python3 deadlock.py; do; done        

Note: does not reproduce if ran with `python -u` (unbuffered)

----------
components: IO, Interpreter Core
messages: 229825
nosy: ionel.mc
priority: normal
severity: normal
status: open
title: Deadlock with writing to stderr from forked process
versions: Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22697>
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