{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"(TyKind::Closure(id_a,"}]}
            (TyKind::Closure(id_a, sub_a), TyKind::Closure(id_b, sub_b)) if id_a == id_b => {
            }
                zip_substs(self, None, sub_a, sub_b)?