{"ast_node_type":"other","tokens":[{"end":6,"kind":"keyword","start":0,"text":"];"}]}
    ];
        bound_sig.rebind(ty::TraitRef::new(cx, future_trait_def_id, [sig.output()])).upcast(cx),
    let future_output_def_id = cx.require_lang_item(TraitSolverLangItem::FutureOutput);