<style>
  :nth-last-child(odd) {
    display: contents;
  }
</style>
<script>
  if (window.testRunner)
     testRunner.dumpAsText();
  onload = () => {
    let q0 = document.createElement('q');
    document.body.append(q0);
    let span0 = document.createElement('span');
    q0.append(span0);
    q0.append(document.createElement('div'));
    span0.append(document.createElement('div'));
    span0.append(document.createElement('div'));
    document.body.offsetTop;
    document.styleSheets[0].insertRule(`xx { yy: zz; }`);
    let link0 = document.createElement('link');
    link0.href = `data:`;
    link0.rel = 'stylesheet';
    document.head.append(link0);
    document.body.append(document.createElement('div'));
  };
</script>
<body>
This test passes if it doesn't crash.
</body>