news: add entry

KowalskiThomas · KowalskiThomas · commit 858e505462fc · 2026-04-13T16:53:17.000-04:00
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-04-13-20-51-34.gh-issue-148259.76UyK8x8.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-04-13-20-51-34.gh-issue-148259.76UyK8x8.rst
@@ -0,0 +1,4 @@
+:meth:`list.remove` now raises :exc:`RuntimeError` if the list is mutated
+during the ``__eq__`` rich comparison and a matching element was found. This
+prevents silent data corruption where the wrong element could be removed from
+a list under concurrent mutation.
