Test failures on Python 3.13.0b1

[mgorny]

I don't seem to be able to find a bug for tracking Python 3.13 support, so I hope it's fine if I file one.

$ tox -e py313
.pkg: _optional_hooks> python /usr/lib/python3.12/site-packages/pyproject_api/_backend.py True setuptools.build_meta
.pkg: get_requires_for_build_sdist> python /usr/lib/python3.12/site-packages/pyproject_api/_backend.py True setuptools.build_meta
.pkg: get_requires_for_build_editable> python /usr/lib/python3.12/site-packages/pyproject_api/_backend.py True setuptools.build_meta
.pkg: build_sdist> python /usr/lib/python3.12/site-packages/pyproject_api/_backend.py True setuptools.build_meta
py313: install_package> python -I -m pip install --force-reinstall --no-deps /tmp/pytest/.tox/.tmp/package/2/pytest-8.3.0.dev38+g93dd34e76.tar.gz
py313: commands[0]> pytest
============================= test session starts ==============================
platform linux -- Python 3.13.0b1, pytest-8.3.0.dev38+g93dd34e76, pluggy-1.5.0
cachedir: .tox/py313/.pytest_cache
rootdir: /tmp/pytest
configfile: pyproject.toml
testpaths: testing
plugins: hypothesis-6.102.1
collected 3668 items

[…]
=========================== short test summary info ============================
FAILED testing/code/test_excinfo.py::TestTraceback_f_g_h::test_traceback_recursion_index
FAILED testing/code/test_excinfo.py::TestFormattedExcinfo::test_repr_traceback_recursion
FAILED testing/code/test_excinfo.py::test_exception_repr_extraction_error_on_recursion
FAILED testing/code/test_source.py::test_getfslineno - assert 368 == -1
FAILED testing/test_collection.py::TestSession::test_collect_protocol_single_function
FAILED testing/test_collection.py::TestSession::test_collect_custom_nodes_multi_id
FAILED testing/test_collection.py::TestSession::test_collect_subdir_event_ordering
FAILED testing/test_collection.py::TestSession::test_collect_two_commandline_args
FAILED testing/test_doctest.py::TestDoctests::test_doctest_unexpected_exception
FAILED testing/test_doctest.py::TestDoctests::test_doctest_linedata_on_property
FAILED testing/test_legacypath.py::test_testdir_makefile_ext_none_raises_type_error
XPASS testing/_py/test_local.py::TestLocalPath::test_make_numbered_dir_multiprocess_safe - #11603
= 11 failed, 3535 passed, 110 skipped, 11 xfailed, 1 xpassed in 138.50s (0:02:18) =
py313: exit 1 (139.10 seconds) /tmp/pytest> pytest pid=65870
  py313: FAIL code 1 (145.84=setup[6.73]+cmd[139.10] seconds)
  evaluation failed :( (146.00 seconds)

This is on Gentoo Linux amd64, with 93dd34e.

Full log:
py313.txt

[bluetech]

Started work on this in #12334. Still some failures to go through.