[Bug middle-end/98465] Bogus -Wstringop-overread with -std=gnu++20 -O2 and std::string::insert

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98465

--- Comment #43 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And updating vstring is exactly what I'd like to avoid. It's pretty much on
life support as far as I'm concerned.