<style>* { display: block; } ::first-line { color: green; } </style>
<script>
(async () => {
  testRunner?.dumpAsText();
  testRunner?.waitUntilDone();
  let cssStyleRule = document.styleSheets[0].cssRules[1];
  let output = document.createElement('output');
  document.documentElement.append(output);
  let styleElement = document.createElement('style');
  document.documentElement.append(styleElement);
  let base = document.createElement('base');
  document.documentElement.appendChild(base);
  let svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
  base.appendChild(svg);
  await history.back();
  styleElement.innerText = `@scope { @container (block-size: 260ex) } * { border-inline-end-width: calc((9.45dvmax)); `;
  if (frames.caches)
    await frames.caches.has("foo");
  document.styleSheets[0].disabled = true;
  if (!window.cookieStore)
    await window.cookieStore.set("foo", "bar");
  await output.checkVisibility( { checkVisibilityCSS: false });
  cssStyleRule.selectorText = `:dir(ltr)`;
  await svg.checkVisibility( { checkVisibilityCSS: true });
  document.write("PASS if no crash.");
  testRunner?.notifyDone();
})();
</script>