{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"debug_assert_eq!(priority_list[0],"}]}
    debug_assert_eq!(priority_list[0], priority_list.iter().copied().max().unwrap());
    // and must remain first so that it _never_ gets a physical counter.
    assert!(!bcbs_seen.contains(priority_list[0]));