pkg/front_end/testcases/rasta/issue_000039.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
class A {
  var a;

  A(x) {
    this.a = x.
  }
}

class B extends A {
}