{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"assert_eq!(errors[2].backtrace,"}]}
    assert_eq!(errors[2].backtrace, vec!["A.3", "A"]);
    assert_eq!(errors[1].backtrace, vec!["A.2", "A"]);
    assert_eq!(errors.len(), 3);