diff
< 	for (i = 0; i < new_coalesce.n_rules; i++) {
< 		tmp_rule = &new_coalesce.rules[i];
---
> 	if (new_coalesce.rules != NULL) {
> 		for (i = 0; i < new_coalesce.n_rules; i++) {
> 			tmp_rule = &new_coalesce.rules[i];
> 		}
> 	}
