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chromium/third_party/blink/web_tests/fast/ruby/following-tab-crash.html 

<!DOCTYPE html>
<html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<style>
#container {
  width: 10em;
  white-space: pre-wrap;
}
</style>
<body>
<div id=container></div>
<script>
test(() => {
  const div = document.querySelector('#container');
  div.innerHTML = '<ruby>xx<rt>foo bar foo bar foo bar foo bar foo bar</rt></ruby><span>&#9;</span>';
  // Force layout.
  div.clientHeight;
  // Success if CommitPendingEndOverhang() didn't crash in |div.clientHeight|.
}, 'Overhanging ruby followed by a TAB should not crash');
</script>
</body>