[Bug libstdc++/105857] codecvt::do_length causes unexpected buffer overflow

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105857

--- Comment #4 from Sam James <sjames at gcc dot gnu.org> ---
It means "GCC (in some form) generates incorrect code for a valid testcase".