[3.13] gh-143543: Fix re-entrant use-after-free in itertools.groupby (GH-143738)#144627

encukou merged 1 commit intopython:3.13python/cpython:3.13from

miss-islington:backport-a91b5c3-3.13miss-islington/cpython:backport-a91b5c3-3.13Copy head branch name to clipboard