pkg/front_end/testcases/general/main_declaration_lib.dart

// Copyright (c) 2020, 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
// This would be an invalid main declaration in a null safe library.
main(String args) {}