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Author: sergey-miryanov

Misc/NEWS.d/next/Core_and_Builtins/2025-06-23-01-07-09.gh-issue-135552.eG9vzP.rst

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+Split the handling of weak references in the GC if both types and instances
+within a generation are unreachable. This prevent  the clearing  of the
+type's subclasses list too early. This fix a segfault that occurs when
+__del__ modifies the base's attributes and tries to access them from self.