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      <base href="https://bugs.webkit.org/">
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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 - fast/mediastream/MediaStream-page-muted.html times out and asserts"
   href="https://bugs.webkit.org/show_bug.cgi?id=170355">170355</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>fast/mediastream/MediaStream-page-muted.html times out and asserts
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>Other
          </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>Media Elements
          </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>eric.carlson&#64;apple.com, jer.noble&#64;apple.com, ryanhaddad&#64;apple.com, webkit-bug-importer&#64;group.apple.com
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        </tr></table>
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        <div>
        <pre>Fairly frequent timeouts and assertion failures on fast/mediastream/MediaStream-page-muted.html

This assertion means that event target wrapper got garbage collected, so this is a general problem with MediaStreamTrack that would affect customers and many test cases. We need to properly protect the wrapper when it's needed.


ASSERTION FAILED: !m_isolatedWorld-&gt;isNormal() || m_wrapper || !m_jsFunction
/Volumes/Data/slave/elcapitan-debug/build/Source/WebCore/bindings/js/JSEventListener.h(127) : JSC::JSObject *WebCore::JSEventListener::jsFunction(WebCore::ScriptExecutionContext *) const
1   0x115194270 WTFCrash
2   0x108a46868 WebCore::JSEventListener::jsFunction(WebCore::ScriptExecutionContext*) const
3   0x108e48d24 WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*)
4   0x1082fffdf WebCore::EventTarget::fireEventListeners(WebCore::Event&amp;, WTF::Vector&lt;WTF::RefPtr&lt;WebCore::RegisteredEventListener&gt;, 1ul, WTF::CrashOnOverflow, 16ul&gt;)
5   0x1082ffb96 WebCore::EventTarget::fireEventListeners(WebCore::Event&amp;)
6   0x1082ffa29 WebCore::EventTarget::dispatchEvent(WebCore::Event&amp;)
7   0x10990c741 WebCore::MediaStreamTrack::trackMutedChanged(WebCore::MediaStreamTrackPrivate&amp;)
8   0x10990c79f non-virtual thunk to WebCore::MediaStreamTrack::trackMutedChanged(WebCore::MediaStreamTrackPrivate&amp;)
9   0x109913b78 WebCore::MediaStreamTrackPrivate::sourceMutedChanged()
10  0x109b81cc0 WebCore::RealtimeMediaSource::setMuted(bool)
11  0x1099a96ed WebCore::MockRealtimeMediaSource::startProducingData()
12  0x1099ae3af WebCore::MockRealtimeVideoSource::startProducingData()
13  0x109903d90 WebCore::MediaStreamTrackPrivate::startProducingData()
14  0x109900b20 WebCore::MediaStreamPrivate::startProducingData()
15  0x1098f4089 WebCore::MediaStream::startProducingData()
16  0x1098f41b0 WebCore::MediaStream::pageMutedStateDidChange()
17  0x1098f41dc non-virtual thunk to WebCore::MediaStream::pageMutedStateDidChange()
18  0x1081093dd WebCore::Document::pageMutedStateDidChange()
19  0x109a5e5ed WebCore::Page::setMuted(unsigned int)
20  0x11c94ee6b WebCore::Internals::setPageMuted(WTF::String const&amp;)</pre>
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