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chromium/third_party/blink/web_tests/fast/multicol/line-in-next-row-in-fourth-inner-multicol.html 

<!DOCTYPE html>
<style>
    * { column-gap:0; }
</style>
<p>The word "PASS" should be seen below.</p>
<div style="columns:1; column-fill:auto; width:10em; height:28px; line-height:20px;">
    <div style="height:8px;"></div>
    <div style="columns:1; column-fill:auto; height:68px;">
        <div style="height:20px;"></div>
        <div style="columns:1; column-fill:auto; height:48px;">
            <div style="columns:1;">
                <br>PASS<br>
            </div>
        </div>
    </div>
</div>