<!DOCTYPE html>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
<p>PASS if no crash or assertion failure.</p>
<div style="-webkit-columns:3;">
    <br>
    <div style="position:relative;"> <!-- need a containing block for the abspos that's inside the multicol container -->
    <div style="margin-top:150px; position:absolute;">
        <div style="-webkit-column-span:all;"></div>
    </div>
</div>