// Copyright JS Foundation and other contributors, http://js.foundation
//
// 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.

var mustBeCalled = false;

class C1 {
  f () {
    mustBeCalled = true;
    return function () {};
  }
}

class C2 extends C1 {
  f () {
    return class extends super.f() {}
  }
}

var c = new C2;
c.f ();

assert (mustBeCalled);