<script>
if (window.testRunner)
    window.testRunner.dumpAsText();
onload = () => {
    document.designMode = 'on';
    getSelection().selectAllChildren(input);
    getSelection().extend(div);
    queueMicrotask(() => {
        document.execCommand('Cut');
    });
    document.execCommand('Outdent');
    document.write("Test passes if it does not crash.");
};
</script>
<body>
  <blockquote>
    <div>
      <div>
        <iframe></iframe>
      </div>
      <input id="input"></input>
    </div>
  </blockquote>
  <div id="div"></div>
</body>