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// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.7
// dart2jsOptions=--strong
// Regression test for issue 32770.
import 'package:expect/expect.dart';
dynamic f;
dynamic g;
class A {}
class B extends A {}
class C extends A {}
class Class<T> {
void Function(E) method<E, F extends E>(void Function(F) callback) {
return (E event) {
g = () => callback(event as F);
};
}
}
main() {
f = new Class<String>().method<A, B>((o) => print(o));
f(new B());
g();
f(new C());
Expect.throws(() => g(), (_) => true);
}