chromium/third_party/blink/web_tests/fast/css/counters/counter-ruby-text-cleared.html

<style>* {counter-increment: x;}</style>
<script>
    window.onload = function() {
        if (window.testRunner)
            testRunner.dumpAsText();
        document.body.innerHTML = "PASS: Clearing ruby text with counters does not crash.";
    }
</script>
<ruby>
    <rt></rt>
    <div></div>
</ruby>