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

[msebor at gcc dot gnu.org]

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

--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #10)
> What about fixing the -g interaction?  Much like how -g shouldn't affect
> code generation, it probably shouldn't be affecting warnings like this.
> 
> There may be more we can/should do here, but that seems like a good place to
> start.

Agreed, I'm looking into that too.  Fixing it won't avoid the warning though,
just make it more consistent (see comment #4).