{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
            let ret_param = block_params_iter.next().unwrap();
        PassMode::Indirect { attrs: _, meta_attrs: None, on_stack: _ } => {
            assert_eq!(fx.bcx.func.dfg.value_type(ret_param), fx.pointer_type);