📜🤖 Added by blurb_it.

blurb-it[bot] · web-flow · commit 1b647a1e9d9d · 2026-04-01T11:05:37.000Z
diff --git a/Misc/NEWS.d/next/Library/2026-04-01-11-05-36.gh-issue-146613.GzjUFK.rst b/Misc/NEWS.d/next/Library/2026-04-01-11-05-36.gh-issue-146613.GzjUFK.rst
@@ -0,0 +1,4 @@
+:mod:`itertools`: Fix re-entrant use-after-free in ``_grouper.__next__``
+that could lead to a segmentation fault when a user-defined ``__eq__``
+re-enters the grouper iterator. The same pattern was previously fixed
+in ``groupby.__next__`` (gh-143543).
