layout/style/crashtests/1455108.html


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<!doctype html>
<style>
  div::first-line {
    color: yellow:
  }
  .foo span {
    display: none;
  }
  .foo::first-line {
    color: red;
  }
</style>
<div><span>Yo, I'm a first-line<span> really</span></span>
<script>
  document.body.offsetTop;
  document.querySelector('div').classList.add('foo');
</script>