STINNER Victor <vstin...@python.org> added the comment:
I failed to write a reproducer from scratch. So let me share my notes here. The
first point is that remove() function of WeakValueDictionary keeps
WeakValueDictionary.data alive like that:
---
class NoisyDel:
def __del__(self):
print("dealloc data dict")
def create_closure():
data = {0: NoisyDel()}
def remove():
return data
return remove
remove = create_closure()
print("clear ")
remove = None
print("exit")
---
data is only deleted once remove is cleared.
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38006>
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