PASS if no crash.
<ruby>
  <object id=object style="display: block"></object>
  <rt style="display: contents">
    <span>
      <div></div>
    </span>
  </rt>
  <rt></rt>
  <span></span>
</ruby>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
document.body.offsetHeight;
object.style.display = "inline";
</script>