[Bug middle-end/98465] [11 Regression] Bogus -Wstringop-overread with -std=gnu++20 -O2 and std::string::insert

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

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

--- Comment #26 from Martin Sebor <msebor at gcc dot gnu.org> ---
I tried the __builtin_object_size patch and while it avoids the warning in the
reported test case it's not effective in others derived from it, such as:

#include <string>

const char constantString[] = {42, 53};

void f(std::string& s, int n)
{
  if (n < 2) n = 2;
  s.insert(0, static_cast<const char*>(constantString), n);
}