<!DOCTYPE html>
<head>
<style>
*::first-letter {
  margin-bottom: 1em;
  float: left;
}
*::before {
  content: 'A';
}
*::after {
  content: 'B';
}
</style>
</head>
<body>PASS if no crash or assert.</body>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
document.body.offsetTop;
document.createElement('div').appendChild(document.body);
</script>
</html>