python-TestSlide fails to build with Python 3.14.0a4.

==================================== ERRORS ====================================
______________ ERROR collecting tests/mock_callable_testslide.py _______________
tests/mock_callable_testslide.py:27: in <module>
    @context("mock_callable()")
testslide/dsl.py:85: in _create_context
    context_code(
tests/mock_callable_testslide.py:1610: in mock_callable_tests
    @context.sub_context
testslide/dsl.py:113: in sub_context
    return self(arg)
testslide/dsl.py:98: in __call__
    return self._create_context(name, context_code)
testslide/dsl.py:85: in _create_context
    context_code(
tests/mock_callable_testslide.py:1730: in mock_sync_async_callable_type_check_errors
    @context.sub_context
testslide/dsl.py:113: in sub_context
    return self(arg)
testslide/dsl.py:98: in __call__
    return self._create_context(name, context_code)
testslide/dsl.py:85: in _create_context
    context_code(
tests/mock_callable_testslide.py:1733: in using_strict_mock
    "run context", target=StrictMock(sample_module.ParentTarget)
testslide/strict_mock.py:615: in __init__
    self.__setup_magic_methods()
testslide/strict_mock.py:416: in __setup_magic_methods
    for name in klass.__dict__:
E   RuntimeError: dictionary changed size during iteration
=========================== short test summary info ============================
ERROR tests/mock_callable_testslide.py - RuntimeError: dictionary changed siz...
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!

https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08609203-python-TestSlide/

For all our attempts to build python-TestSlide with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-TestSlide/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.