[3.13] gh-143309: fix UAF in os.execve when the environment is concurrently mutated (GH-143314)#143431

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

picnixz:backport-9609574-3.13picnixz/cpython:backport-9609574-3.13Copy head branch name to clipboard