webkit-scrollbar-corner-viewport-crash.html

<!doctype html>
<title>CSS Test: Custom scrollbars for viewport - crash removing scrollbar corner</title>
<style>
  .scroll {
    overflow: scroll;
  }
  .scroll::-webkit-scrollbar {
    width: 16px;
    height: 16px;
  }
  .scroll::-webkit-scrollbar-corner {
    background-color: orange;
  }
</style>
<script>
  document.documentElement.className = "scroll";
  requestAnimationFrame(() => {
    requestAnimationFrame(() => {
      document.documentElement.className = "";
    });
  });
</script>

chromium/third_party/blink/web_tests/wpt_internal/css/css-overflow/webkit-scrollbar-corner-viewport-crash.html