https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103911
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-10 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:b596c35a4ed0143e84422449020296b43a655de7 commit r10-10560-gb596c35a4ed0143e84422449020296b43a655de7 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)
