<style>
body { writing-mode: vertical-lr }
.c { direction: rtl; columns: 10px; widows: 100; }
.f { float: left; min-block-size: 1000px; shape-outside: border-box; border-top-style: solid; }
label { border-top-style: solid };
</style>
<div class=c>
<label>
<div class=f>This test passes if it doesn't crash.</div>
</div>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>