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chromium/third_party/blink/web_tests/fast/multicol/span/spanner-after-negative-margin-bottom-crash-2.html 

<!DOCTYPE html>
<div style="columns:1;">
    <div style="height:1px;"></div>
    <div style="margin-top:20px; margin-bottom:-500px;"></div>
    <div style="column-span:all;"></div>
    <div style="height:1px;"></div>
</div>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script>
    test(function() { }, "No crash!");
</script>