Checklist

• I am confident this is a bug in CPython, not a bug in a third-party project
• I have searched theCPython issue tracker,
  and am confident this bug has not been reported before

CPython versions tested on:

3.10, CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.13.0a0 (heads/main:607f18c894, Aug 15 2023, 08:58:26) [GCC 11.4.0]

A clear and concise description of the bug:

Doctests belonging to afunctools.cached_property are not ran by doctest.

Here is a minimal example (saved in a filet.py):

fromfunctoolsimportcached_propertyclassFoo:@cached_propertydefmy_cached_property(self):"""        >>> assert False        """return1

If I then invoke doctest with this file, I'd expect to see an assertion error. Instead, this doctest is skipped:

$python -m doctest t.py# no failing output due to assertion error$echo$?# zero exit code0

Note, this issue was originally reported here:pytest-dev/pytest#11237.

Linked PRs

• gh-107995: Fix doctest collection of functools.cached_property objects #107996