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      <base href="https://bugs.webkit.org/">
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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - exceptions.AttributeError: BuilderStatus instance has no attribute 'buildHorizon'"
   href="https://bugs.webkit.org/show_bug.cgi?id=170070">170070</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>exceptions.AttributeError: BuilderStatus instance has no attribute 'buildHorizon'
          </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>lforschler&#64;apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>lforschler&#64;apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>2017-03-24 12:40:45-0700 [-]  step 'MasterShellCommand' complete: success
2017-03-24 12:40:45-0700 [-]  &lt;Build Apple iOS 10 Simulator Debug WK2 (Tests)&gt;: build finished
2017-03-24 12:40:45-0700 [-] Unhandled error in Deferred:
2017-03-24 12:40:45-0700 [-] Unhandled Error
        Traceback (most recent call last):
          File &quot;/usr/lib/python2.7/site-packages/buildbot/process/build.py&quot;, line 529, in buildFinished
            self.build_status.buildFinished()
          File &quot;/usr/lib/python2.7/site-packages/buildbot/status/build.py&quot;, line 285, in buildFinished
            w.callback(self)
          File &quot;/usr/lib64/python2.7/site-packages/twisted/internet/defer.py&quot;, line 368, in callback
            self._startRunCallbacks(result)
          File &quot;/usr/lib64/python2.7/site-packages/twisted/internet/defer.py&quot;, line 464, in _startRunCallbacks
            self._runCallbacks()
        --- &lt;exception caught here&gt; ---
          File &quot;/usr/lib64/python2.7/site-packages/twisted/internet/defer.py&quot;, line 551, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File &quot;/usr/lib/python2.7/site-packages/buildbot/status/builder.py&quot;, line 517, in _buildFinished
            self.prune() # conserve disk
          File &quot;/usr/lib/python2.7/site-packages/buildbot/status/builder.py&quot;, line 226, in prune
            earliest_build = self.nextBuildNumber - self.buildHorizon
        exceptions.AttributeError: BuilderStatus instance has no attribute 'buildHorizon'</pre>
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