<!doctype html>
<meta charset=utf-8>
<title>VerticalCellComparator.compare bug</title>
<table>
<tr>
  <td></td>
  <td rowspan="3"></td>
  <td rowspan="3">cell1</td>
</tr>
<tr>
  <td colspan="2"></td>
  <td rowspan="2">cell0</td>
</tr>
</table>