[Bug c++/91397] -Wstringop-overflow specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807

[steinar+gcc at gunderson dot no]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91397

--- Comment #8 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
But all of those conditions include last_slash > path.

I tried adding this just before the mem_strdupl() call:

  if (last_slash < path) {
    ib::fatal() << "Logic error.";
    __builtin_unreachable();
  }

and the warning still triggers.