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chromium/third_party/blink/web_tests/fast/multicol/span/empty-block-between-spanners.html 

<!DOCTYPE html>
<p>PASS if no crash or assertion failure.</p>
<div style="columns:2; line-height:20px;">
    <div style="margin-bottom:1px;">
        <br>
        <div style="column-span:all;"></div>
        <div></div>
        <div style="column-span:all;"></div>
    </div>
    <br>
</div>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script>
    test(function() { }, "No crash!");
</script>