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chromium/third_party/blink/web_tests/external/wpt/css/css-break/abspos-in-opacity-000.html 

<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:[email protected]">
<link rel="help" href="https://www.w3.org/TR/css-break-3/">
<link rel="match" href="abspos-in-opacity-000-ref.html">
<p>There should be a purple square below.</p>
<div style="columns:2; column-gap:0; column-fill:auto; width:100px; height:100px; background:blue;">
  <div style="opacity:0.5;">
    <div style="position:absolute; width:100px; height:100px; background:red;"></div>
  </div>
</div>