LayoutTests/fast/dom/shadow/frameless-media-element-crash.html

<script>
if (window.testRunner)
    testRunner.dumpAsText();

var doc = document.implementation.createHTMLDocument();
doc.open();
doc.write('<video controls></video>');
doc.close();

</script>
<p>Creating a video element in a frameless document should not crash WebKit.
<p>This test passes if it does not crash.