pkg/front_end/test/flow_analysis/type_promotion/data/assignment.dart

// 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.

f(Object x) {
  if (x is String) {
    x = 42;
    x;
  }
}