BUG: crash on Python 3.13 (free-threading flavor)

[neutrinoceros]

3 tests fail on this build, seemingly for the same reason that getattr(math, "__file__", None) return some falsy value (supposedly None)
xref: #232

I wasn't able to reproduce this behavior locally using a free-threading build obtained as

PYTHON_CONFIGURE_OPTS='--disable-gil' pyenv install 3.13.0b1

so I conclude that this may be an issue specifically with the deadsnakes build. Since I couldn't find an issue tracker for it and it's very new anyway, I'll merge #232 and re-assess in a couple weeks to months. I expect the problem will go away "by itself" either in deadsnakes or when this build is supported in the setup-python action.

[neutrinoceros]

Turns out this is actually a bug in wxc.
xref deadsnakes/issues#287