chromium/third_party/blink/web_tests/fast/events/custom-event-uninitialized.html

<p>This test passes if it does not crash. (https://bugs.webkit.org/show_bug.cgi?id=63885)</p>

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

    String(document.createEvent("CustomEvent").detail);
</script>