<!DOCTYPE html>
<p>There should be one yellow box below, on a blue background. the "second column" part should be clipped out.</p>
<div style="overflow:hidden; -webkit-columns:2; -webkit-column-gap:1em; column-fill:auto; width:17em; height:13em; line-height:2em;">
    <div style="will-change:transform; position:absolute; left:0; right:0; height:13em; background:blue;"></div>
    <br>
    <br>
    <br>
    <br>
    <div style="position:relative; overflow:hidden; margin:0.5em; height:8.5em; background:yellow;">
        first<br>
        column<br>
        second<br>
        column<br>
        <div style="background:red;">FAIL</div>
    </div>
</div>