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

hugovk merged 1 commit intopython:3.14python/cpython:3.14from

miss-islington:backport-fc7a188-3.14miss-islington/cpython:backport-fc7a188-3.14Copy head branch name to clipboard