<!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>