<!DOCTYPE html>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
<style>
  p, body {
    display: flex;
  }
  p {
    writing-mode: vertical-rl;
    width: intrinsic;
  }
</style>
<body>
<p>Passes if it doesn't crash!</p>
</body>