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[3.14] gh-146613: Fix re-entrant use-after-free in `itertools._grouper` (GH-147962) (#148010)

gh-146613: Fix re-entrant use-after-free in `itertools._grouper` (GH-147962)
(cherry picked from commit fc7a188fe70a7b98696b4fcee8db9eb8398aeb7b)

Co-authored-by: Ma Yukun <68433685+TheSkyC@users.noreply.github.com>
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Miss Islington (bot) committed
07158b605d638c3e79709939ceb114de4658b3d9
Parent: 40a0a94
Committed by GitHub <noreply@github.com> on 4/6/2026, 3:23:08 PM