📜🤖 Added by blurb_it.

blurb-it[bot] · web-flow · commit 97f0ba1ac672 · 2025-10-24T14:29:15.000Z
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-24-14-29-12.gh-issue-133465.A5d6TM.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-24-14-29-12.gh-issue-133465.A5d6TM.rst
@@ -0,0 +1 @@
+Fix race when updating :attr:type.__bases__ that could allow a read of :attr:type.__base__ to observe an inconsistent value on the :term:free-threaded <free threading> build.

Original file line number	Diff line number	Diff line change
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	`1`	`+Fix race when updating :attr:type.__bases__ that could allow a read of :attr:type.__base__ to observe an inconsistent value on the :term:free-threaded <free threading> build.`