`smartlist_choose_node_by_bandwidth()` does not check for the bad exit flag, and can return badexited relays. The sister function `smartlist_choose_node_by_bandwidth_weights` correctly checks for the bad exit flag. The good thing is that `node_sl_choose_by_bandwidth()` will only use the faulty function if the bandwidth weight system fails. This should not happen to the current network though. Hence, this does not seem to be a big issue.