{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"ty::CoroutineClosure(..)"}]}
            ty::CoroutineClosure(..) => todo!("FIXME(async_closures): Lower these to SMIR"),
            )),
            ty::Coroutine(def_id, generic_args) => TyKind::RigidTy(RigidTy::Coroutine(