{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"force_infer_lt.expect(\"lifetimes"}]}
                        force_infer_lt.expect("lifetimes ought to have been inferred");
                    let (provided_arg_idx, param_id) =
                    ctx.report_arg_mismatch(param_id, provided_arg_idx, has_self_arg);