cpython/Misc/NEWS.d/next/Core and Builtins/2024-06-13-12-17-52.gh-issue-120384.w1UBGl.rst

Fix an array out of bounds crash in ``list_ass_subscript``, which could be
invoked via some specifically tailored input: including concurrent modification
of a list object, where one thread assigns a slice and another clears it.