<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>This tests that sets for overhanging floating objects are cleaned up properly when the floating object is destroyed.</title>
<script>
  if (window.testRunner)
    testRunner.dumpAsText();
</script>
<style>
  html {
    position: absolute;
  }
  
  .float { 
    float: left; 
  }
</style>
</head>
<head id="head1" style="-webkit-writing-mode: horizontal-bt;"></head>

<i>
  <button id="button1">PASS if no crash or ASSERT in debug.</button>
</i>
<td id="td1">
  <body></body>
</td>
<i></i>

<script>
var docElement = document.documentElement;
function crash() {
    button1 = document.getElementById("button1");
    button1.classList.toggle("float");

    head1 = document.getElementById("head1");
    td1 = document.getElementById("td1");
    head1.appendChild(td1);

    docElement.offsetTop;
    head1.style.display = "list-item";
    docElement.offsetTop;
    button1.classList.toggle("float");
}
document.addEventListener("DOMContentLoaded", crash, false);
</script>
</html>