<style>
.verticalContainer { 
  writing-mode: vertical-rl;
  column-count: 2;
}
.spanner {
  column-span: all;
}
</style>
PASS if the test finishes.
<sup><h1><div class=verticalContainer><meter></meter><div dir='RTL' class=spanner></div></div></h1></sup>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>