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chromium/third_party/blink/web_tests/virtual/text-antialias/vertical-spacing-crash.html 

<style>
* { writing-mode: vertical-lr; letter-spacing: 1;}
</style>

<body>
&#xfcb7;
PASS: did not crash.
  <script>
    if (window.testRunner)
      testRunner.dumpAsText();
  </script>
</body>