[Bug libstdc++/101361] Bogus -Wstringop-overread warning with -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101361

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It seems acceptable, but isn't the diagnostic bug still there if users write
exactly the same code? The use of npos there is valid.