[issue28649] refleak in typing.py

[Yury Selivanov]

Yury Selivanov added the comment:

reflesk with only functools:

    def test_lru_type_error(self):
        @functools.lru_cache(maxsize=None)
        def foo(o):
            raise TypeError

        with self.assertRaises(TypeError):
            foo([])

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28649>
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