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<html xmlns="http://www.w3.org/1999/xhtml" class="reftest-wait">
<head>
<script>
<![CDATA[

function funn()
{
  var q = document.getElementById("q");

  var start1 = document.getElementById("start1");
  var end1 = document.getElementById("end1");

  var start2 = q; // div
  var end2 = q.previousSibling; // text node

  var r = document.createRange();
  r.setStart(start1, 0);
  r.setEnd(end1, 0);
  r.deleteContents();
  
  // the offsets for start2 and end2 must be the same to trigger the assertion
  var s = document.createRange();
  s.setStart(start2, 0);
  s.setEnd(end2, 0);
  
  document.documentElement.removeAttribute("class");
}

]]>
</script>

</head>

<body onload="setTimeout(funn, 30)">
  <div id="start1"></div>
  <div id="t">X<div id="q">Y</div></div>
  <div id="end1"></div>
</body>

</html>