[Bug libstdc++/105995] QoI: constexpr basic_string variable must use all of its SSO buffer

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105995

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
C++20 supports dynamic allocation for constexpr.