<!DOCTYPE html>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
<style>
    .mc { -webkit-column-count:3; }
    .li { display:list-item; }
    .spanner { -webkit-column-span:all; }
</style>
<p>PASS if no assertion failure or crash.</p>
<div class="mc">
    <div class="mc">
        <div class="li spanner"></div>
        <div class="mc spanner"></div>
    </div>
</div>