<!doctype html>
<title>Filtered <marker> with <clipPath> ancestor on <polygon></title>
<link rel="match" href="../../struct/reftests/reference/green-100x100.html">
<svg>
<clipPath>
<marker id="m" filter="url(#f)"/>
<filter id="f"/>
</clipPath>
<polygon points="0,0 100,0 100,100 0,100" fill="green" marker-start="url(#m)"/>
</svg>