[New-bugs-announce] [issue26037] Crash when reading sys.stdin.buffer in a daemon thread

[eph ​]

New submission from eph ​:

I wrote a script to non-blocking reading binary data from stdin like this:


import sys, threading

def _thread():
    data = sys.stdin.buffer.readline()

thread = threading.Thread(target=_thread)
thread.daemon = True
thread.start()


and the output is like this:


Fatal Python error: could not acquire lock for <_io.BufferedReader name='<stdin>'> at interpreter shutdown, possibly due to daemon threads

Thread 0x00007faf54ebf700 (most recent call first):
  File "pipetcpadapter.py", line 8 in func
  File "/usr/lib/python3.5/threading.py", line 862 in run
  File "/usr/lib/python3.5/threading.py", line 914 in _bootstrap_inner
  File "/usr/lib/python3.5/threading.py", line 882 in _bootstrap

Current thread 0x00007faf566da700 (most recent call first):
Aborted (core dumped)

----------
components: IO
messages: 257685
nosy: eph ​
priority: normal
severity: normal
status: open
title: Crash when reading sys.stdin.buffer in a daemon thread
type: crash
versions: Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26037>
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