bug#64309: Python dlopen()s musl libc

[Josselin Poiret via Bug reports for GNU Guix <bug-guix@gnu.org>]

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Hi Athena,

Athena Martin <secure@alm.website> writes:

> $ guix shell python-neovim-remote python -- python3
>>>> sys.path
> ['', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python310.zip', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10/lib-dynload', '/home/alm/.local/lib/python3.10/site-packages', '/gnu/store/ll75wx2cvm1dbbxjr095lcs1653q2zz1-profile/lib/python3.10/site-packages', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10/site-packages']
>
> (It's not from the environment:)
>
> $ guix shell python-neovim-remote python --pure -- python3
>>>> sys.path
> ['', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python310.zip', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10/lib-dynload', '/home/alm/.local/lib/python3.10/site-packages', '/gnu/store/ll75wx2cvm1dbbxjr095lcs1653q2zz1-profile/lib/python3.10/site-packages', '/gnu/store/dy3xh053ahkhrp2jamggq8cpsyvp8mg0-python-3.10.7/lib/python3.10/site-packages']
>>>> os.environ
> environ({'HOME': '/home/alm', 'LOGNAME': 'alm', 'PAGER': 'less', 'DISPLAY': ':0', 'USER': 'alm', 'TERM': 'xterm-256color', 'PATH': '/gnu/store/ll75wx2cvm1dbbxjr095lcs1653q2zz1-profile/bin', 'GUIX_PYTHONPATH': '/gnu/store/ll75wx2cvm1dbbxjr095lcs1653q2zz1-profile/lib/python3.10/site-packages', 'GUIX_ENVIRONMENT': '/gnu/store/ll75wx2cvm1dbbxjr095lcs1653q2zz1-profile'})

So, looks like the default Python behavior is to load the usercustomize
after the sitecustomize [1], which leads to exactly the behavior you're
experiencing.  I don't know what we should do here, maybe pass `-s` to
the shebang line of Python to disable loading the usercustomize?  That
would probably be a world-rebuild though.  CC'ing the Python team to see
what they think.

[1] https://docs.python.org/3/library/site.html

Best,
-- 
Josselin Poiret

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