{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
                let infer_ct = self.ecx.next_const_infer();
            ty::ConstKind::Unevaluated(..) if !ct.has_escaping_bound_vars() => {
                let normalizes_to = ty::PredicateKind::AliasRelate(