python-typeguard fails to build with Python 3.14.0a2.

_________________________ TestRecursiveType.test_fail __________________________
/builddir/build/BUILD/python-typeguard-4.4.1-build/python-typeguard-4.4.1/tests/test_checkers.py:1411: in test_fail
    check_type({"a": (1, 2, 3)}, JSONType)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_functions.py:107: in check_type
    check_type_internal(value, expected_type, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:427: in check_union
    raise TypeCheckError(f"did not match any element in the union:\n{formatted_errors}")
E   typeguard.TypeCheckError: dict did not match any element in the union:
E     str: is not an instance of str
E     float: is neither float or int
E     bool: is not an instance of bool
E     NoneType: is not an instance of NoneType
E     List[annotationlib.JSONType]: is not a list
E     Dict[str, annotationlib.JSONType]: value of key 'a' did not match any element in the union:
E       str: is not an instance of str
E       float: is neither float or int
E       bool: is not an instance of bool
E       NoneType: is not an instance of NoneType
E       List[annotationlib.JSONType]: is not a list
E       Dict[str, annotationlib.JSONType]: is not a dict

During handling of the above exception, another exception occurred:
/builddir/build/BUILD/python-typeguard-4.4.1-build/python-typeguard-4.4.1/tests/test_checkers.py:1392: in test_fail
    with pytest.raises(
E   AssertionError: Regex pattern did not match.
E    Regex: "dict did not match any element in the union:\n  str: is not an instance of str\n  float: is neither float or int\n  bool: is not an instance of bool\n  NoneType: is not an instance of NoneType\n  List\\[JSONType\\]: is not a list\n  Dict\\[str, JSONType\\]: value of key 'a' did not match any element in the union:\n    str: is not an instance of str\n    float: is neither float or int\n    bool: is not an instance of bool\n    NoneType: is not an instance of NoneType\n    List\\[JSONType\\]: is not a list\n    Dict\\[str, JSONType\\]: is not a dict"
E    Input: "dict did not match any element in the union:\n  str: is not an instance of str\n  float: is neither float or int\n  bool: is not an instance of bool\n  NoneType: is not an instance of NoneType\n  List[annotationlib.JSONType]: is not a list\n  Dict[str, annotationlib.JSONType]: value of key 'a' did not match any element in the union:\n    str: is not an instance of str\n    float: is neither float or int\n    bool: is not an instance of bool\n    NoneType: is not an instance of NoneType\n    List[annotationlib.JSONType]: is not a list\n    Dict[str, annotationlib.JSONType]: is not a dict"
_____________________ test_typevar_forwardref[importhook] ______________________
/builddir/build/BUILD/python-typeguard-4.4.1-build/python-typeguard-4.4.1/tests/test_instrumentation.py:333: in test_typevar_forwardref
    instance = dummymodule.typevar_forwardref(dummymodule.DummyClass)
/builddir/build/BUILD/python-typeguard-4.4.1-build/python-typeguard-4.4.1/tests/dummymodule.py:339: in typevar_forwardref
    def typevar_forwardref(x: Type[T]) -> T:
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_functions.py:137: in check_argument_types
    check_type_internal(value, annotation, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:481: in check_class
    check_typevar(value, expected_class, (), memo, subclass_check=True)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:538: in check_typevar
    check_type_internal(value, annotation, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/builddir/build/BUILD/python-typeguard-4.4.1-build/BUILDROOT/usr/lib/python3.14/site-packages/typeguard/_checkers.py:504: in check_class
    raise TypeCheckError(f"is not a subclass of {qualified_name(expected_class)}")
E   typeguard.TypeCheckError: argument "x" (class dummymodule.DummyClass) is not a subclass of dummymodule.DummyClass

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_64/08300782-python-typeguard/

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

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.