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chromium/third_party/blink/web_tests/external/wpt/html/semantics/interactive-elements/the-details-element/modified-details-crash.html 

<!doctype HTML>
<link rel=author href="mailto:[email protected]">
<link rel=help href="https://crbug.com/1276488">

<style>
.first + .second {}
</style>

<script>
const details = document.createElement('details');
const ol = document.createElement('ol');
const text = document.createTextNode('abcdefghijklmnopqrstuvxyz');

function step3() {
  ol.setAttribute('class', 'first');
}

function step2() {
  details.appendChild(text);
  requestAnimationFrame(step3);
}

function runTest() {
  document.documentElement.appendChild(details);
  details.appendChild(ol);

  requestAnimationFrame(step2);
}

onload = runTest;
</script>