codegen.c: `-9223372036854775808 % -1` overflows 64 bit integer.
@@ -824,12 +824,17 @@ gen_binop(codegen_scope *s, mrb_sym op, uint16_t dst)
if (!mrb_num_shift(s->mrb, n0, -n, &n)) return FALSE;
}
else if (op == MRB_OPSYM_2(s->mrb, mod) && n != 0) {
+ if (n0 == MRB_INT_MIN && n == -1) {
+ n = 0;
+ }
+ else {
mrb_int n1 = n0 % n;
if ((n0 < 0) != (n < 0) && n1 != 0) {
n1 += n;
}
n = n1;
}
+ }
else if (op == MRB_OPSYM_2(s->mrb, and)) {
n = n0 & n;
}
