<!DOCTYPE html>
<p>Insert a spanner after another spanner and before existing multicol content. The other spanner has a multicol container with yet another spanner inside.</p>
<p>PASS if no crash or assertion failure.</p>
<div style="-webkit-column-count:3;">
    <div style="-webkit-column-span:all;">
        <div style="-webkit-column-count:2;">
            <div style="-webkit-column-span:all;"></div>
            &nbsp;
        </div>
    </div>
    <div id="willBecomeSpanner"></div>
    &nbsp;
</div>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
    document.body.offsetTop;
    document.getElementById("willBecomeSpanner").style.webkitColumnSpan = "all";
</script>