r = sd_bus_attach_event(m->bus, m->event, 0);
if (r < 0) {
log_error("Failed to attach bus to event loop: %s", strerror(-r));
r = sd_bus_attach_event(m->bus, m->event, 0);
if (r < 0) {
log_error("Failed to attach bus to event loop: %s", strerror(-r));