chromium/third_party/blink/web_tests/external/wpt/css/css-break/firefox-bug-1903652-crash.html

<!-- Quirks mode -->
<link rel="author" title="Ting-Yu Lin" href="mailto:[email protected]">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1903652">

<style>
* {
  font-size-adjust: 0;
  column-width: 0;
  vertical-align: 7;
}
</style>
<script>
window.requestIdleCallback(() => {
  a.appendChild(b)
})
</script>
<mfrac id="a" style="border-style: solid">
<mo>a</mo>
<mn>a</mn>
<textarea style="float: left">a</textarea>
<sub>
<menu id="b">