<!DOCTYPE html>
<p>Test that summary elements will always be blocks, even if attempted displayed as table-row, and
    that a spanner splitting it doesn't have any ill effects.</p>
<p>Below you should see 'PASS' three times. Letter spacing will vary.</p>
<div id="container" style="display:none; -webkit-columns:4; -webkit-column-gap:0; width:4em;">
    <summary style="display:table-row;">
        P<br>A<br>S<br>S
        <div style="-webkit-column-span:all;">PASS</div>
        P<br>A<br>S<br>S
    </summary>
</div>
<script>
    onload = function() {
        document.body.offsetTop;
        document.getElementById('container').style.display = "block";
    }
</script>