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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Flaky assertion failures on storage/indexeddb/cursor-update-private.html"
   href="https://bugs.webkit.org/show_bug.cgi?id=153724">153724</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Flaky assertion failures on storage/indexeddb/cursor-update-private.html
          </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>WebCore JavaScript
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>ap&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>beidson&#64;apple.com, ryanhaddad&#64;apple.com
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        <pre>storage/indexeddb/cursor-update-private.html hist an assertion somewhat frequently:

<a href="http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&amp;tests=storage%2Findexeddb%2Fcursor-update-private.html">http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&amp;tests=storage%2Findexeddb%2Fcursor-update-private.html</a>

ASSERTION FAILED: !m_isolatedWorld-&gt;isNormal() || m_wrapper || !m_jsFunction
/Volumes/Data/slave/elcapitan-debug/build/Source/WebCore/bindings/js/JSEventListener.h(118) : JSC::JSObject *WebCore::JSEventListener::jsFunction(WebCore::ScriptExecutionContext *) const
1   0x104dd5670 WTFCrash
2   0x10a995273 WebCore::JSEventListener::jsFunction(WebCore::ScriptExecutionContext*) const
3   0x10ac1f98b WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*)
4   0x10a2f1857 WebCore::EventTarget::fireEventListeners(WebCore::Event&amp;, WebCore::EventTargetData*, WTF::Vector&lt;WebCore::RegisteredEventListener, 1ul, WTF::CrashOnOverflow, 16ul&gt;&amp;)
5   0x10a2f1083 WebCore::EventTarget::fireEventListeners(WebCore::Event&amp;)
6   0x10a7beceb WebCore::IDBEventDispatcher::dispatch(WebCore::Event&amp;, WTF::Vector&lt;WTF::RefPtr&lt;WebCore::EventTarget&gt;, 0ul, WTF::CrashOnOverflow, 16ul&gt;&amp;)

This assertion means that a function was called after having been garbage collected.</pre>
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