<svg>
<use id='use'></use>
<use id="used">
<animate attributeName="y"></animate>
</use>
<script>
if(testRunner)
testRunner.dumpAsText();
document.getElementById('use').setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', '#used');
</script>
<text x='0' y='0'>This test passes if it doesn't crash.</text>
</svg>