pathlib gets imported as a namespace

[CastixGitHub]

Bug report

Bug description:

I unpacked the same 3.14-rc3 tarball on two similar gentoo systems

I'm unable to reproduce the bug on both.

• the one that works: gcc 14.3.0, configured without --with-py-debug
• the one that doesn't work: gcc 13.3.1, --with-py-debug

>>> import _pyrepl.simple_interact
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    import _pyrepl.simple_interact
  File "/root/wip/wip/Python-3.14.0rc3/Lib/_pyrepl/simple_interact.py", line 36, in <module>
    from .readline import _get_reader, multiline_input, append_history_file
  File "/root/wip/wip/Python-3.14.0rc3/Lib/_pyrepl/readline.py", line 50, in <module>
    from .unix_console import UnixConsole as Console, _error
  File "/root/wip/wip/Python-3.14.0rc3/Lib/_pyrepl/unix_console.py", line 36, in <module>
    from . import terminfo
  File "/root/wip/wip/Python-3.14.0rc3/Lib/_pyrepl/terminfo.py", line 6, in <module>
    from pathlib import Path
ImportError: cannot import name 'Path' from 'pathlib' (unknown location)
>>> from pathlib import Path
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
    from pathlib import Path
ImportError: cannot import name 'Path' from 'pathlib' (unknown location)
>>> import sys
>>> sys.modules['pathlib']
<module 'pathlib' (namespace) from ['/root/wip/wip/Python-3.14.0rc3/Lib/pathlib']>
>>>
(venv14) localhost ~/wip/wip/yeastr # ls /root/wip/wip/Python-3.14.0rc3/Lib/pathlib
__init__.py  __pycache__  _os.py  types.py

So pathlib gets imported as a PEP420 ns, yet there's a __init__

Any idea on how to debug this? Thanks!

CPython versions tested on:

3.14

Operating systems tested on:

Linux

[picnixz]

Why importing import _pyrepl.simple_interact? also it could be because of some build conflicts? have you tried cleaning up all files before configuring and compiling Python? it's extremely weird that it fails in --with-pydebug but it could be that some .so files are not correctly loaded.

What's the input of both ./python -VV and what about using ./python -I for isolation?

[CastixGitHub]

It doesn't happen outside of the virtualenv
(and i created them both ...

Oh, with the /usr/bin/virtualenv -p ...
so, the one that doesn't work was from CPython3.12
and the one that works was from 3.13

Why importing import _pyrepl.simple_interact?

It's just to leak where I first encountered the issue 😅

cleaning up all files before configuring and compiling Python

Both of them were clean vanilla builds (mh, the broken one maybe... I tried to add --with-valgrind but then figured out I don't have valgrind there and didn't clean)
I'll comment if rebuilding from scratch doesn't work 👍

[picnixz]

so, the one that doesn't work was from CPython3.12

This may be the issue because we changed the layout of pathlib at some point and I think it was there. Can you check that it works if you use the venv for the same Python version?

[CastixGitHub]

I'll comment if rebuilding from scratch doesn't work 👍

You were right!
unpacked again and reconfigured/make, created a new venv through the same 3.12 virtualenv and it did work.

Thanks a lot!

[CastixGitHub]

Well, it wasn't due to the configure being dirty.
It's a somehow bad meta_path import hook within my project; I apologize