{"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
                        let name = if tcx.sess.opts.unstable_opts.span_free_formats {
                    | AggregateKind::CoroutineClosure(def_id, args) => ty::tls::with(|tcx| {
                            let args = tcx.lift(args).unwrap();