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chromium/third_party/blink/web_tests/external/wpt/accessibility/crashtests/missing-parent-map.html 

<!DOCTYPE html>
<html class="test-wait">
<input type=checkbox>
<div></div>
<map name="map1">
  <details style="visibility: collapse">
  </details>
</map>
<img usemap="#map1">
<map name="map1" class="duplicate-map">

<script>
document.addEventListener('DOMContentLoaded', () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      const div = document.querySelector('div');
      div.appendChild(document.querySelector('.duplicate-map'));
      document.querySelector('input').checked = true;  // Serialize immediately.
      requestAnimationFrame(() => {
        requestAnimationFrame(() => {
          document.documentElement.className = '';
        });
      });
    });
  });
});
</script>
</html>