https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113103
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- a[21][1]; main() { for (size_t b = 0; b < 21; ++b) for (size_t c = 0; c < 21; ++c) a[b][c] = 60329; That is an out of bounds access so undefined code.