[Bug c++/121814] Optimization has changed the code behavior

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121814

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
    for (auto c = __cs; c < __cs + __ilen; ++c)
        __s += c;

Shouldn't that be __len not __ilen?