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Memory leak with static iterator types #91632
Description
Python does not finalizes iterators of some types at exit leading to memory leak.
Reproducer:
a = type(iter(tuple[int]))
print(a.mro())Leak:
[<class 'generic_alias_iterator'>, <class 'object'>]
[119 refs, 46 blocks]See also #90575
Activity
corona10 commentedon Apr 17, 2022
cc @vstinner
vstinner commentedon Apr 19, 2022
static PyTypeObject Py_GenericAliasIterType = {...}of Objects/genericaliasobject.c is not cleared at exit. It's a variant of https://bugs.python.org/issue46417Either the type should be accessible in Objects/object.c for
_PyTypes_FiniTypes()(remove "static", add "_" to hide the symbol). Or a _PyGenericAlias_Fini() function should be added in called in finalize_interp_types() in the main interpreter.gh-91632: Fix generic_alias_iterator to be finalized at exit. (GH-91727)