/*
 * Copyright (c) 2023-2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

class A<T>{}

let g:((y:A<int>) => A<int>|null)|null = /* @@ label */(y:A<String>): A<String>|null => {
    return y;
}

/* @@@ label Error TypeError: Type '(y: A<String>) => A<String>|null' cannot be assigned to type '(y: A<Int>) => A<Int>|null|null'  */