chromium/third_party/blink/web_tests/editing/selection/move-selection-detached-frame-crash.html

<!DOCTYPE html>
<html>
<head>
    <script src="../../resources/js-test.js"></script>
</head>
<body>
    <iframe></iframe>
    <script>
        description('Should not crash if iframe\'s document element\'s focusout event handler removes the iframe in the parent document and the selection is moved.');

        function run() {
            var iframe = document.getElementsByTagName('iframe')[0];
            iframe.contentDocument.documentElement.contentEditable = true;
            iframe.contentDocument.documentElement.addEventListener('focusout', function () {
                iframe.parentNode.removeChild(iframe);
            }, false);
            iframe.contentDocument.documentElement.focus();

            if (window.eventSender)
                eventSender.keyDown('ArrowDown');

            testPassed('Did not crash.');
            window.finishJSTest();
        }

        document.addEventListener('DOMContentLoaded', run);
    </script>
</body>
</html>