blob: 97b69929163387cc052b0faf9de54cca53f66d30 [file] [log] [blame]
// Copyright (c) 2017, 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 = 2.9
import "package:expect/expect.dart";
class A {}
class B extends A {}
Iterable<B> f(A a) sync* {
yield a;
}
void main() {
A a = new B();
for (var x in f(a)) {} // No error
a = new A();
var iterator = f(a).iterator;
Expect.throwsTypeError(() {
iterator.moveNext();
});
}