{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"tcx.hir_span(tcx.local_def_id_to_hir_id(def_id)),"}]}
                tcx.hir_span(tcx.local_def_id_to_hir_id(def_id)),
            span_bug!(
                "fn_arg_idents: unexpected item {:?}",