<!DOCTYPE html>
<html>
Test passes if it does not crash.
<style>
.column-layout { -webkit-column-count: 1; }
.column-span-all { -webkit-column-span: all; }
.after-content:after { display: block; content: "" }
</style>
<div class="column-layout">
    <span class="after-content">
        <div></div>
    </span>
    <div class="column-span-all"></div>
</div>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
</html>