css/css-pseudo/spelling-error-004-crash.html

<!doctype html><meta charset="utf-8">
<title>CSS Pseudo-Elements Test: spelling error with unusual root element</title>
<link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#highlight-ua-styles">
<link rel="help" href="https://crbug.com/1359175">
<meta name="assert" value="Checks that spelling errors in an HTML document with the wrong root element (body) will not cause a crash, even if this means there are no longer any default UA styles.">
<!-- TODO force spelling error without relying on UA under test having English spellchecking https://github.com/web-platform-tests/wpt/issues/30863 -->
<body contenteditable spellcheck lang="en">quikc
<script>
    document.documentElement.replaceWith(document.body);
    document.documentElement.focus();
</script>