Units that failed to load were never cleaned up. It was possible to
reach the 128K limit of units by attempting to load a bunch of nonsense.
Bug observed by Reartes Guillermo in
https://bugzilla.redhat.com/show_bug.cgi?id=680122
u->meta.load_state = UNIT_ERROR;
u->meta.load_error = r;
unit_add_to_dbus_queue(u);
u->meta.load_state = UNIT_ERROR;
u->meta.load_error = r;
unit_add_to_dbus_queue(u);
+ unit_add_to_gc_queue(u);
log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));
log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r));