https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105995
--- Comment #5 from CVS 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:98a0d72a610a87e8e383d366e50253ddcc9a51dd commit r13-1139-g98a0d72a610a87e8e383d366e50253ddcc9a51dd Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Jun 16 14:57:32 2022 +0100 libstdc++: Support constexpr global std::string for size < 15 [PR105995] I don't think this is required by the standard, but it's easy to support. libstdc++-v3/ChangeLog: PR libstdc++/105995 * include/bits/basic_string.h (_M_use_local_data): Initialize the entire SSO buffer. * testsuite/21_strings/basic_string/cons/char/105995.cc: New test.