[python 3.12] DeprecationWarning: shutil.rmtree() - onerror argument is deprecated, use onexc instead

[hrnciar]

In Fedora we are building Python packages with the upcoming Python 3.12. Since the 7th alpha click started to fail with DeprecationWarning: onerror argument is deprecated, use onexc instead.

==================================== ERRORS ====================================
____________ ERROR at setup of test_isolated_runner_custom_tempdir _____________
/usr/lib64/python3.12/shutil.py:698: in rmtree
    warnings.warn("onerror argument is deprecated, use onexc instead",
E   DeprecationWarning: onerror argument is deprecated, use onexc instead
_________________ ERROR at setup of test_path_resolve_symlink __________________
/usr/lib64/python3.12/shutil.py:698: in rmtree
    warnings.warn("onerror argument is deprecated, use onexc instead",
E   DeprecationWarning: onerror argument is deprecated, use onexc instead
___________________ ERROR at setup of test_iter_keepopenfile ___________________
/usr/lib64/python3.12/shutil.py:698: in rmtree
    warnings.warn("onerror argument is deprecated, use onexc instead",
E   DeprecationWarning: onerror argument is deprecated, use onexc instead
_____________________ ERROR at setup of test_iter_lazyfile _____________________
/usr/lib64/python3.12/shutil.py:698: in rmtree
    warnings.warn("onerror argument is deprecated, use onexc instead",
E   DeprecationWarning: onerror argument is deprecated, use onexc instead
=========================== short test summary info ============================
ERROR tests/test_testing.py::test_isolated_runner_custom_tempdir - Deprecatio...
ERROR tests/test_types.py::test_path_resolve_symlink - DeprecationWarning: on...
ERROR tests/test_utils.py::test_iter_keepopenfile - DeprecationWarning: onerr...
ERROR tests/test_utils.py::test_iter_lazyfile - DeprecationWarning: onerror a...
============= 572 passed, 21 skipped, 1 xfailed, 4 errors in 1.36s =============

shutil.rmtree() now accepts a new argument onexc which is an error handler like onerror but which expects an exception instance rather than a (typ, val, tb) triplet. onerror is deprecated and will be removed in Python 3.14. (Contributed by Irit Katriel in gh-102828.)

Environment:

• Python version: 3.12.0a7
• Click version: 8.13

[davidism]

It's being fixed in pytest.