pkg/front_end/testcases/general/duplicated_field_initializer.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 file.
// @dart=2.9
class A {
  int a;
  int a;
  A(this.a);
}

void main() {
  A(1);
}