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chromium/third_party/blink/web_tests/fast/ruby/percentage-height-child-crash.html 

<!DOCTYPE html>
<p>PASS if no crash or assertion failure.</p>
<ruby style="display:block ruby;">
    <rt>&nbsp;</rt>
    <div style="height:50%;"></div>
    <rt id="elm" style="display:none;">&nbsp;</rt>
    &nbsp;
</ruby>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
    document.body.offsetTop;
    document.getElementById("elm").style.display = "block";
</script>