[3.14] gh-146093: Fix csv _set_str(): check if PyUnicode_DecodeASCII() failed (GH-146113)#146130

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

miss-islington:backport-724c7c8-3.14miss-islington/cpython:backport-724c7c8-3.14Copy head branch name to clipboard