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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - ASSERTION FAILED: !isUnreachableNode(m_target.get()) when focusing any input element"
   href="https://bugs.webkit.org/show_bug.cgi?id=149589">149589</a>
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        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERTION FAILED: !isUnreachableNode(m_target.get()) when focusing any input element
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mcatanzaro&#64;igalia.com
          </td>
        </tr></table>
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        <pre>Created <span class=""><a href="attachment.cgi?id=261997" name="attach_261997" title="backtrace">attachment 261997</a> <a href="attachment.cgi?id=261997&amp;action=edit" title="backtrace">[details]</a></span>
backtrace

I get this assertion:

ASSERTION FAILED: !isUnreachableNode(m_target.get())
../../Source/WebCore/dom/EventContext.cpp(43) : WebCore::EventContext::EventContext(PassRefPtr&lt;WebCore::Node&gt;, PassRefPtr&lt;WebCore::EventTarget&gt;, PassRefPtr&lt;WebCore::EventTarget&gt;)

When I click on any input element (such as the text entry on this Bugzilla page). It's a quite recent regression, so I'm suspicious of r190153 and r190214, which recently modified this code (CC: Ryosuke).</pre>
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