pkg/front_end/testcases/rasta/issue_000047.dart

// Copyright (c) 2016, 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.md file.
// @dart=2.9
typedef void T(C<C>);

T main() => null;