[issue38930] Subprocess failed to kill child process after timeout when using with statement

2019-11-27 Thread Xuan Hu


New submission from Xuan Hu :

The original issue is that the `timeout` in `subprocess.run()` does not work 
properly, so I try to use `subprocess.Popen()` instead. There are two 
references I found, [1] is the implementation of `subprocess.run()` and [2] is 
the example for `Popen.communicate()`. Surprisingly, [2] works for me, and 
seems the `with` statement is the cause of the issue.

I created a snippet [3] to reproduce the bug, note that `ffmpeg` is needed to 
run the script. Ideally, all the time should be less than 0.1 or just a little 
bit greater than 0.1, but when using the `with` statement, the result would be 
much larger than that.

[1] 
https://github.com/python/cpython/blob/0f9c9d53283420a570850aa92869d032b40d4fba/Lib/subprocess.py#L489
[2] 
https://docs.python.org/3/library/subprocess.html#subprocess.Popen.communicate
[3] https://gist.github.com/huxuan/d58a5899be9b42e0936c71dd7884442a

--
components: Library (Lib)
messages: 357568
nosy: Xuan Hu
priority: normal
severity: normal
status: open
title: Subprocess failed to kill child process after timeout when using with 
statement
type: behavior
versions: Python 3.8

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[issue38930] Subprocess failed to kill child process after timeout when using with statement

2019-11-27 Thread Xuan Hu


Xuan Hu  added the comment:

Seems it is a false negative report. Close it temporarily.

--
stage:  -> resolved
status: open -> closed

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