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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 - False positive from EWS?"
   href="https://bugs.webkit.org/show_bug.cgi?id=163838">163838</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>False positive from EWS?
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </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&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>krollin&#64;apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>ap&#64;webkit.org, cgarcia&#64;igalia.com, lforschler&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=292462" name="attach_292462" title="Screenshot of bug 163777">attachment 292462</a> <a href="attachment.cgi?id=292462&amp;action=edit" title="Screenshot of bug 163777">[details]</a></span>
Screenshot of <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - NetworkSession: switch to use subclasses for NetworkSession and NetworkDataTask implementations"
   href="show_bug.cgi?id=163777">bug 163777</a>

The attached screenshot shows <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - NetworkSession: switch to use subclasses for NetworkSession and NetworkDataTask implementations"
   href="show_bug.cgi?id=163777">Bug 163777</a>. At the time I took it, the patch in <a href="show_bug.cgi?id=163838#c4">comment #4</a> was the most recent one. The EWS status at the top of the window shows that the iOS builds failed while the macOS builds succeeded.

I looked at the patch and it seemed like the macOS builds should have failed for the same reasons as the iOS builds. I checked out recent sources (OpenSource r207702), applied patch 292341, and built the result, and it indeed failed as expected.

So it's not apparent to me how/why the EWS macOS builds succeeded. Is there something wrong, or do I just not understand the role and operation of EWS?</pre>
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