Segmentation fault - datetime python module

[SrGitQ]

          @SrGitQ can you please open that as a new issue with a full repro of instructions how to observe this (including the source code)? I would be happy to investigate.

Originally posted by @davidhewitt in #451 (comment)

To recreate this Issue I will create a new virtual environment [python 3.12] in my Ubuntu OS (I tested this bug on my other computers with different OS). Then I created two python scripts main.py and datetime.py. In main.py I will import pydantic and try to run this script.
Here is the content of main.py

from pydantic import BaseModel

class AnyClass(BaseModel):
    ...

The python execution will be crashed by a segmenetation fault error (parent reference).

[davidhewitt]

Thanks, what about the contents of datetime.py? What are the exact steps I should take to observe this crash?

[SrGitQ]

Thanks, what about the contents of datetime.py? What are the exact steps I should take to observe this crash?

That's it...
datetime.py is empty. Even if it is a folder with a __init__.py file (which is considered a module) it crash...
You can observe some logs by enable the faulthandler but that's all you need to crash it.

[davidhewitt]

Right, so I see what is going on, this looks like a PyO3 upstream bug. The cause is that the datetime standard library module is replaced by your empty datetime module, but PyO3 is handling this very badly...

Let's see if we can get this fixed 👍