<html>
<head>
<script>
function runTest()
{
   document.execCommand("selectAll", true);
   document['designMode'] = 'on';
   document.execCommand("insertHorizontalRule", true);
   document.body.replaceWith(document.createElement('div'));
   document.execCommand("insertHorizontalRule", true);
   if (window.testRunner) {
       testRunner.dumpAsText();
       document.documentElement.textContent = 'PASS. WebKit did not crash.';
   }
}
window.onload = runTest;
</script>
</head>
<body>
</body>
</html>