chromium/third_party/blink/web_tests/fast/multicol/vertical-lr/unsplittable-inline-block.html

<!DOCTYPE html>
<style>
    html {
        -webkit-writing-mode: vertical-lr;
    }
    .columns {
        width: 300px;
        -webkit-column-count: 2;
        -webkit-column-gap: 0;
        column-fill: auto;
        border: 5px solid black;
        padding: 5px;
        line-height: 20px;
    }
    .inline_block {
        display: inline-block;
        border: 2px solid green;
    }
</style>
<div class="columns">
    <div style="width: 250px;"></div>
    <div class="inline_block">
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
        This should be in the second column.<br>
    </div>
</div>