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    <body><span class="vcard"><a class="email" href="mailto:ap&#64;webkit.org" title="Alexey Proskuryakov &lt;ap&#64;webkit.org&gt;"> <span class="fn">Alexey Proskuryakov</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - imported/mathml-in-html5/mathml/presentation-markup/scripts/subsup-parameters-1.html is a flaky timeout"
   href="https://bugs.webkit.org/show_bug.cgi?id=158993">bug 158993</a>
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          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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           <td style="text-align:right;">CC</td>
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               &nbsp;
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           <td>jonlee&#64;apple.com, mmaxfield&#64;apple.com
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         <tr>
           <td style="text-align:right;">Component</td>
           <td>Tools / Tests
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           <td>Text
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - imported/mathml-in-html5/mathml/presentation-markup/scripts/subsup-parameters-1.html is a flaky timeout"
   href="https://bugs.webkit.org/show_bug.cgi?id=158993#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - imported/mathml-in-html5/mathml/presentation-markup/scripts/subsup-parameters-1.html is a flaky timeout"
   href="https://bugs.webkit.org/show_bug.cgi?id=158993">bug 158993</a>
              from <span class="vcard"><a class="email" href="mailto:ap&#64;webkit.org" title="Alexey Proskuryakov &lt;ap&#64;webkit.org&gt;"> <span class="fn">Alexey Proskuryakov</span></a>
</span></b>
        <pre>No, not a harness error.

When the test fails, document.fonts.ready promise just never gets resolved:

  window.addEventListener(&quot;load&quot;, function() {
    document.fonts.ready.then(function() {
      //  This doesn't get called!
      window.setTimeout(runTests, 250);
    });
  });

My theory is that the promise never gets fulfilled if the fonts finish loading before onload, which sounds like an actual WebKit bug.</pre>
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