LayoutTests/editing/execCommand/insert-newline-in-quoted-content-crash.html

<script>
  if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
  }
  onload = async () => {
    visualViewport.onresize = () => {
      document.execCommand('InsertNewlineInQuotedContent');
      document.write("Test passes if it does not crash.");
      if (window.testRunner)
        testRunner.notifyDone();
    };
    document.body.appendChild(document.createElement('object'));
    document.body.appendChild(document.createElement('div'));
    document.body.appendChild(document.createElement('iframe'));
    document.execCommand('SelectAll');
    document.designMode = 'on';
    document.execCommand('Copy');
    document.createElement('img').src = 'a';
    let animation = new Animation();
    animation.play();
    await animation.ready;
    document.execCommand('Paste');
    document.execCommand('PasteAsQuotation');
    getSelection().modify('move', 'left', 'character');
    document.execCommand('InsertUnorderedList');
    await new Blob().arrayBuffer();
    document.execCommand('SelectAll');
    document.execCommand('InsertUnorderedList');
  };
</script>