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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ASSERTION FAILED: !m_frame-&gt;page()-&gt;defersLoading() || InspectorInstrumentation::isDebuggerPaused(m_frame)"
   href="https://bugs.webkit.org/show_bug.cgi?id=160193">160193</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERTION FAILED: !m_frame-&gt;page()-&gt;defersLoading() || InspectorInstrumentation::isDebuggerPaused(m_frame)
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>WebKit Local 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>Keywords</th>
          <td>Gtk, LayoutTestFailure
          </td>
        </tr>

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

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

        <tr>
          <th>Component</th>
          <td>Page Loading
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>cgarcia&#64;igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>achristensen&#64;apple.com, beidson&#64;apple.com, bugs-noreply&#64;webkitgtk.org, darin&#64;apple.com
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        </tr></table>
      <p>
        <div>
        <pre>This is happening in the GTK+ Debug bot when running test loader/load-defer.html (note that the assert is inside an !USE(CF) block).

The test is creating an iframe with load deferred, then in a timeout it disables the deferred load and checks that the load actually happens. What happens is that the initial empty document is what calls DocumentLoader::finishedLoading() when load is still deferred. The onload handler is not called because load events are disabled for the initial empty document in SubframeLoader::loadSubframe(), but DocumentLoader::finishedLoading() is called unconditionally from maybeLoadEmpty(). I think it's fine to call DocumentLoader::finishedLoading() for the initial empty document even when load is deferred, so we can simply update the assert to handle that case.</pre>
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