{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"let"}]}
        let b_layout = tcx.layout_of(typing_env.as_query_input(b)).unwrap();
        let a_layout = tcx.layout_of(typing_env.as_query_input(a)).unwrap();
        assert_eq!(a_layout.backend_repr, b_layout.backend_repr);