LayoutTests/fast/animation/css-animation-marker-crash.html

<style>
  @keyframes a0 {
    from {
      opacity: 0;
    }
  }
  ::marker {
    animation-name: a0;
    animation-duration: 1ms;
  }
  li {
    columns: 3;
  }
</style>
<li>PASS if this doesn't crash</li>
<script>
  if (window.testRunner)
      testRunner.dumpAsText(); 
</script>