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<!DOCTYPE html>
<html class="test-wait">
<!-- Test that setting aria-owns from an aria-hidden subtree does not crash -->
<script>
document.addEventListener("DOMContentLoaded", () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      document.getElementById('owner').removeAttribute('aria-owns');
      requestAnimationFrame(() => {
        requestAnimationFrame(() => {
          document.documentElement.className = '';
        });
      });
    });
  });
});
</script>
</head>
<body>
<main aria-hidden="true">
  <fieldset id='owner' aria-owns="paragraph1">
    Text
  </fieldset>
</main>

<div role="complementary" aria-label="Natural parent">
  <p id="paragraph1">
    <mark>
      Child
    </mark>
  </p>
</div>
</body>
</html>