<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Test for wkbug.com/85202: Passes if a crash does not occur. -->
    <script>
        window.onload = function() {
            if (window.testRunner) {
                testRunner.dumpAsText();
                testRunner.waitUntilDone();
                setTimeout(function(){ testRunner.notifyDone() }, 0);
            }
        }
    </script>
    <mask id="mask"><a id="foo"/></mask>
    <animateMotion xlink:href="#foo"/>
    <use xlink:href="#mask" id="use"/>
    <use xlink:href="#use"/>
    <text x="20" y="20" fill="green">PASS: Animating pruned shadow tree did not cause a crash.</text>
</svg>