STINNER Victor <vstin...@redhat.com> added the comment:
The issue comes maybe from the complex code in Lib/test/libregrtest/refleak.py
to handle the ABC cache:
abcs = {}
for abc in [getattr(collections.abc, a) for a in collections.abc.__all__]:
if not isabstract(abc):
continue
for obj in abc.__subclasses__() + [abc]:
abcs[obj] = _get_dump(obj)[0]
...
# clear type cache
sys._clear_type_cache()
# Clear ABC registries, restoring previously saved ABC registries.
abs_classes = [getattr(collections.abc, a) for a in collections.abc.__all__]
abs_classes = filter(isabstract, abs_classes)
for abc in abs_classes:
for obj in abc.__subclasses__() + [abc]:
for ref in abcs.get(obj, set()):
if ref() is not None:
obj.register(ref())
obj._abc_caches_clear()
clear_caches()
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36560>
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