[Webkit-unassigned] [Bug 170355] New: fast/mediastream/MediaStream-page-muted.html times out and asserts

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=170355

            Bug ID: 170355
           Summary: fast/mediastream/MediaStream-page-muted.html times out
                    and asserts
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ap at webkit.org
                CC: eric.carlson at apple.com, jer.noble at apple.com,
                    ryanhaddad at apple.com,
                    webkit-bug-importer at group.apple.com

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->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&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener>, 1ul, WTF::CrashOnOverflow, 16ul>)
5   0x1082ffb96 WebCore::EventTarget::fireEventListeners(WebCore::Event&)
6   0x1082ffa29 WebCore::EventTarget::dispatchEvent(WebCore::Event&)
7   0x10990c741 WebCore::MediaStreamTrack::trackMutedChanged(WebCore::MediaStreamTrackPrivate&)
8   0x10990c79f non-virtual thunk to WebCore::MediaStreamTrack::trackMutedChanged(WebCore::MediaStreamTrackPrivate&)
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&)

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