<title>X</title>
<style>
    @property --v {
        syntax: "<transform-function>";
        inherits: false;
        initial-value: translate(0);
    }
    title {
        --v: perspective(0rem);
        height: var(--v);
    }
</style>
<div id=t></div>
<script>
  if (window.testRunner)
    testRunner.dumpAsText();

  /* This test passes if it doesn't crash */
  onload = async () => {
    document.createElement('audio').src = 'data:';
    history.back();
    if (window.caches)
        await caches.has('a');
    document.head.innerHTML += '';
  };
</script>