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

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

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

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't reproduce a crash, or any runtime error from valgrind, ubsan, asan, ...