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// Copyright (c) 2019, 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
// Test that we emit the relation between B and A even when B is only live
// as a type argument through the supertype of D.
class A {}
class B implements A {}
class C<T> {}
class D implements C<B> {}
main() {
C<A> c = new D();
void test(C<A> c) {}