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[3.12] gh-108295: Fix crashes with TypeVar weakrefs (GH-108517) (#108527)

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gh-108295: Fix crashes with TypeVar weakrefs (GH-108517)
(cherry picked from commit 482fad7f01)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
This commit is contained in:
Miss Islington (bot) 2023-08-27 07:12:57 -07:00 • committed by GitHub
parent 3e20303717
commit 09877a15d5
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10
Lib/test/test_typing.py
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@ -544,6 +544,16 @@ class TypeVarTests(BaseTestCase):
with self.assertRaises(TypeError):
list[T][arg]
def test_many_weakrefs(self):
# gh-108295: this used to segfault
for cls in (ParamSpec, TypeVarTuple, TypeVar):
with self.subTest(cls=cls):
vals = weakref.WeakValueDictionary()
for x in range(100000):
vals[x] = cls(str(x))
del vals
def template_replace(templates: list[str], replacements: dict[str, list[str]]) -> list[tuple[str]]:
"""Renders templates with possible combinations of replacements.