https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121046
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:f534db54a65b42638c08275338423063fe836f31 commit r16-3823-gf534db54a65b42638c08275338423063fe836f31 Author: Jonathan Wakely <jwak...@redhat.com> Date: Sat Jul 12 13:09:03 2025 +0100 libstdc++: Constrain __gnu_debug::bitset(const CharT*) constructor [PR121046] The r16-3435-gbbc0e70b610f19 change (for LWG 4294) needs to be applied to the debug mode __gnu_debug::bitset as well as the normal one. libstdc++-v3/ChangeLog: PR libstdc++/121046 * include/debug/bitset (bitset(const CharT*, ...)): Add constraints on CharT type.