chromium/third_party/blink/web_tests/fragmentation/table-in-subpixel-fragmentainer.html

<!DOCTYPE html>
<style>
body { overflow:hidden; } /* Avoid triggering a second layout pass, as that might hide bugs. */
.table { display:table; width:100%; }
.row { display:table-row; break-inside:avoid; }
.row > div { width:100%; height:60px; background:blue; }
</style>
<p>There should be six blue squares below. They should ideally be
    perfectly vertically aligned, but since Blink doesn't support
    subpixel rendering inside tables, off-by-one is acceptable. But
    there should be no blue lines below the squares.</p>
<div id="multicol" style="position:relative; width:410px; columns:6; column-fill:auto; column-gap:10px; height:88.7px;">
    <div class="table">
        <div class="row">
            <div data-offset-x="0"></div>
        </div>
        <div class="row">
            <div data-offset-x="70"></div>
        </div>
        <div class="row">
            <div data-offset-x="140"></div>
        </div>
        <div class="row">
            <div data-offset-x="210"></div>
        </div>
        <div class="row">
            <div data-offset-x="280"></div>
        </div>
        <div class="row">
            <div data-offset-x="350"></div>
        </div>
    </div>
</div>

<script src="../resources/check-layout.js"></script>
<script>
    checkLayout("#multicol");
</script>