https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103911
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:97f9d2f9b2a6172f31c971ac0d99ebc712b2501b commit r11-9907-g97f9d2f9b2a6172f31c971ac0d99ebc712b2501b Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Jan 5 16:25:47 2022 +0000 libstdc++: Do not use std::isdigit in <charconv> [PR103911] This avoids a potential race condition if std::setlocale is used concurrently with std::from_chars. libstdc++-v3/ChangeLog: PR libstdc++/103911 * include/std/charconv (__from_chars_alpha_to_num): Return char instead of unsigned char. Change invalid return value to 127 instead of using numeric trait. (__from_chars_alnum): Fix comment. Do not use std::isdigit. Change type of variable to char. (cherry picked from commit c83ecfbe74a5cf107642b9c5e1680b548ff1a0e1)
