// Copyright (c) 2015, 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.//// VMOptions=--old_gen_heap_size=7// Test that compaction does occur on repeated add/remove.main() {  var x = {};  for (int i = 0; i < 1000000; i++) {    x[i] = 10;    x.remove(i);  }}