LayoutTests/fast/dynamic/document-elment-renderer-null-crash.html

<div id=insertionPoint>PASS if no crash</div>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
var iframe = document.createElement("iframe");
insertionPoint.appendChild(iframe);

var iframeDocument = iframe.contentWindow.document; 
iframeDocument.open();
iframeDocument.appendChild(document.createElement("script"));
iframeDocument.close();
</script>