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chromium/third_party/blink/web_tests/external/wpt/css/css-anchor-position/chrome-336322507-crash.html 

<!DOCTYPE html>
<link rel="help" href="https://crbug.com/336322507">
<style>
  #crash {
    --grad: linear-gradient(black, white);
    background: var(--grad);
    position: absolute;
    top: anchor(center);
  }
</style>
<div id="crash"></div>
<script>
  document.body.offsetTop;
  crash.remove();
</script>