Jun 3, 2024 · Jun 3, 2024 · Jun 3, 2024
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
        self.assertEqual(A[T], A[T])
        self.assertNotEqual(A[T], B[T])

    def test_buggy_eq(self):
        class BrokenEq(abc.ABCMeta):
            def __eq__(self, other):
                raise TypeError("I'm broken")

        class G(Generic[T], metaclass=BrokenEq):
            pass

        alias = G[int]
        self.assertIs(get_origin(alias), G)
        self.assertEqual(get_args(alias), (int,))

    def test_multiple_inheritance(self):

        class A(Generic[T, VT]):
diff --git a/Lib/typing.py b/Lib/typing.py
        args = (args,)

    args = tuple(_type_convert(p) for p in args)
    is_generic_or_protocol = clsin (Generic,Protocol)
    is_generic_or_protocol = clsisGeneric or cls isProtocol

    if is_generic_or_protocol:
        # Generic and Protocol can only be subscripted with unique type variables.
            args = (args,)
        self.__args__ = tuple(... if a is _TypingEllipsis else
                              a for a in args)
        enforce_default_ordering = originin (Generic,Protocol)
        enforce_default_ordering = originisGeneric or origin isProtocol
        self.__parameters__ = _collect_type_parameters(
            args,
            enforce_default_ordering=enforce_default_ordering,
diff --git a/Misc/NEWS.d/next/Library/2024-06-03-04-14-14.gh-issue-119972.nwtxx6.rst b/Misc/NEWS.d/next/Library/2024-06-03-04-14-14.gh-issue-119972.nwtxx6.rst
 Fix specialization of :class:`typing.Generic` class with a broken ``__eq__``
 method. Patch by Jelle Zijlstra.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1209,7 +1209,7 @@ def _generic_class_getitem(cls, args):
		args = (args,)

		args = tuple(_type_convert(p) for p in args)
		is_generic_or_protocol = clsin (Generic,Protocol)
		is_generic_or_protocol = clsisGeneric or cls isProtocol

		if is_generic_or_protocol:
		# Generic and Protocol can only be subscripted with unique type variables.
Expand DownExpand Up		@@ -1416,7 +1416,7 @@ def __init__(self, origin, args, *, inst=True, name=None):
		args = (args,)
		self.__args__ = tuple(... if a is _TypingEllipsis else
		a for a in args)
		enforce_default_ordering = originin (Generic,Protocol)
		enforce_default_ordering = originisGeneric or origin isProtocol
		self.__parameters__ = _collect_type_parameters(
		args,
		enforce_default_ordering=enforce_default_ordering,
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fix specialization of :class:`typing.Generic` class with a broken ``__eq__``
		method. Patch by Jelle Zijlstra.