chromium/third_party/blink/web_tests/editing/text-iterator/first-letter-rtl-crash.html

<!DOCTYPE html>
<html>
<style>
body:first-letter { color: black; }
</style>
<script>

function run() {
    document.execCommand('findString', false, '!ABC');
    document.body.innerHTML = '<br>This test ensures WebKit does not crash when first-letter rule is applied to LTR letters that ' +
    ' are not visually contiguous to each other.<br>PASS';
    if (window.testRunner)
        testRunner.dumpAsText();
}

</script>
<body style="direction: rtl;" onload="run()">!ABC&#x202E;</body>