editor/libeditor/crashtests/612565-1.html


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<!DOCTYPE html>
<html>
  <body>
    <iframe></iframe>
  </body>
  <script>
    onload = function() {
      var i = document.querySelector("iframe");
      var doc = i.contentDocument;
      doc.body.appendChild(doc.createTextNode("foo"));
      doc.designMode = "on";
      while (doc.body.firstChild) {
        doc.body.removeChild(doc.body.firstChild);
      }
    };
  </script>
</html>