[issue44105] tempfile.TemporaryDirectory deleted after call to subprocess.run in threads

[Colas Le Guernic]

New submission from Colas Le Guernic :

Yet another weird bug when one creates sub-processes from threads.
I found several issues mentioning ThreadPoolExecutor and subprocess.run but I 
believe this one is different.

When creating a temporary directory with tempfile.TemporaryDirectory (with or 
without context manager) it is sometimes deleted by a call to subprocess.run 
when both occurs inside a task sent to a ThreadPoolExecutor created without a 
context manager (that last part is very odd).

Running the attached file on python 3.8.5 or 3.8.10 shows the issue only occurs 
if the executor is not created through a context manager.

The bug does not seem to occur on python 3.9.5 or 3.10.0b1.

Using a ProcessPoolExecutor seems to fix the issue too.

--
files: test_tmpdir.py
messages: 393436
nosy: colas.le.guernic
priority: normal
severity: normal
status: open
title: tempfile.TemporaryDirectory deleted after call to subprocess.run in 
threads
type: behavior
versions: Python 3.8
Added file: https://bugs.python.org/file50035/test_tmpdir.py

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[issue44105] tempfile.TemporaryDirectory deleted after call to subprocess.run in threads

[Colas Le Guernic]

Change by Colas Le Guernic :


--
components: +Library (Lib)

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[issue44105] tempfile.TemporaryDirectory deleted after sleep in threads

[Colas Le Guernic]

Colas Le Guernic  added the comment:

Actually, it has nothing to do with subprocess.run, replacing that line with 
sleep(random()) exhibits the same behavior.

--
title: tempfile.TemporaryDirectory deleted after call to subprocess.run in 
threads -> tempfile.TemporaryDirectory deleted after sleep in threads
Added file: https://bugs.python.org/file50036/mwe.py

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[issue44105] tempfile.TemporaryDirectory deleted after sleep in threads

[Colas Le Guernic]

Change by Colas Le Guernic :


--
versions: +Python 3.6, Python 3.7

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[issue44105] tempfile.TemporaryDirectory deleted after sleep in threads

[Colas Le Guernic]

Colas Le Guernic  added the comment:

I guess this will be a `won't fix` as python3.8 is now in security-fix only 
mode.
I was misled by https://www.python.org/downloads/ that still indicates a bugfix 
maintenance status.

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