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      <base href="https://bugs.webkit.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ImageOnly reference tests may have race condition if the test (or it's expected result) resizes the window"
   href="https://bugs.webkit.org/show_bug.cgi?id=198200">198200</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>ImageOnly reference tests may have race condition if the test (or it's expected result) resizes the window
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Tools / Tests
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>drousso@apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre><<a href="https://trac.webkit.org/r244353">https://trac.webkit.org/r244353</a>> caused fast/css/sticky/sticky-left-percentage.html to start failing (ImageOnlyFailing) <<a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION (r244353) [Mac WK2] Layout Test fast/css/sticky/sticky-left-percentage.html is a flaky ImageOnlyFailure"
   href="show_bug.cgi?id=198195">https://webkit.org/b/198195</a>>.

```
Error: test and reference images have different sizes. Test image is 800x700, reference image is 800x600
ImageDiff crashed
```

I think this may be a problem with the timing of when the image snapshots are taken, as fast/css/sticky/sticky-left-percentage.html involves resizing the window before the test ends (adds an event listener for "load").</pre>
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