ready-state-change-crash.https.html

<!DOCTYPE html>
<html>
Test passes if it does not crash.
<body>
<div id="a"></div>
<div id="b">
    <iframe id="f" src="about:blank"></iframe>
</div>

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

var listenerActive = false;
var inner_doc = document.getElementById('f').contentDocument;
inner_doc.open();

inner_doc.addEventListener('readystatechange', () => {
    document.getElementById('a').appendChild(document.getElementById('b'));
});

inner_doc.close();
</script>
</body>
</html>

chromium/third_party/blink/web_tests/wpt_internal/fenced_frame/ready-state-change-crash.https.html