[Webkit-unassigned] [Bug 123403] New: MediaStreamTrackPrivate's m_client uninitialized

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123403

           Summary: MediaStreamTrackPrivate's m_client uninitialized
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pnormand at igalia.com


This leads to a segfault, the member variable should be initialized in the constructor I think. Trivial patch incoming.

#0  0x00007fc66cfd50f9 in WebCore::MediaStreamTrackPrivate::setReadyState (this=0x21d1e90, 
    state=WebCore::MediaStreamSource::Live)
    at ../../Source/WebCore/platform/mediastream/MediaStreamTrackPrivate.cpp:191
#1  0x00007fc66cfd4c4e in WebCore::MediaStreamTrackPrivate::setSource (this=0x21d1e90, 
    source=0x2257710) at ../../Source/WebCore/platform/mediastream/MediaStreamTrackPrivate.cpp:80
#2  0x00007fc66cfd4bbd in WebCore::MediaStreamTrackPrivate::MediaStreamTrackPrivate (
    this=0x21d1e90, source=0x2257710)
    at ../../Source/WebCore/platform/mediastream/MediaStreamTrackPrivate.cpp:69
#3  0x00007fc66cfd49fc in WebCore::MediaStreamTrackPrivate::create (source=...)
    at ../../Source/WebCore/platform/mediastream/MediaStreamTrackPrivate.cpp:39
#4  0x00007fc66cfd1a0b in WebCore::MediaStreamDescriptor::MediaStreamDescriptor (this=0x2125b60, 
    id="2bd7aee2-a71a-4f68-847f-fe8bba59dca2", 
    audioSources=WTF::Vector of length 1, capacity 16 = {...}, 
    videoSources=WTF::Vector of length 1, capacity 16 = {...}, ended=false)
    at ../../Source/WebCore/platform/mediastream/MediaStreamDescriptor.cpp:109
#5  0x00007fc66cfd1645 in WebCore::MediaStreamDescriptor::create (
    audioSources=WTF::Vector of length 1, capacity 16 = {...}, 
    videoSources=WTF::Vector of length 1, capacity 16 = {...}, 
    flag=WebCore::MediaStreamDescriptor::IsNotEnded)
    at ../../Source/WebCore/platform/mediastream/MediaStreamDescriptor.cpp:49
#6  0x00007fc66cfdcbfd in WebCore::MediaStreamCenterGStreamer::createMediaStream (this=0x22d99e0, 
    prpQueryClient=..., audioConstraints=..., videoConstraints=...)
    at ../../Source/WebCore/platform/mediastream/gstreamer/MediaStreamCenterGStreamer.cpp:102
#7  0x00007fc66d0c9525 in WebCore::UserMediaRequest::createMediaStream (this=0x21c4500)
    at ../../Source/WebCore/Modules/mediastream/UserMediaRequest.cpp:151
#8  0x00007fc66d0caf97 in WTF::FunctionWrapper<void (WebCore::UserMediaRequest::*)()>::operator()
    (this=0x1f77100, c=0x21c4500) at ../../Source/WTF/wtf/Functional.h:218
#9  0x00007fc66d0cada0 in WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (WebCore::UserMediaRequest::*)()>, void (WebCore::UserMediaRequest*)>::operator()() (this=0x1f770f0)
    at ../../Source/WTF/wtf/Functional.h:496
#10 0x00007fc67140d93f in WTF::Function<void ()>::operator()() const (this=0x21cb5e0)
    at ../../Source/WTF/wtf/Functional.h:704
#11 0x00007fc67140d005 in std::_Function_handler<void (), WTF::Function<void ()> >::_M_invoke(std::_Any_data const&) (__functor=...) at /usr/include/c++/4.8/functional:2071
#12 0x00007fc67140c338 in std::function<void ()>::operator()() const (this=0x1f833c0)
    at /usr/include/c++/4.8/functional:2468
#13 0x00007fc67140b910 in WTF::callFunctionObject (context=0x1f833c0)
    at ../../Source/WTF/wtf/MainThread.cpp:236
#14 0x00007fc67140b592 in WTF::dispatchFunctionsFromMainThread ()
    at ../../Source/WTF/wtf/MainThread.cpp:167
#15 0x00007fc67143020d in WTF::timeoutFired () at ../../Source/WTF/wtf/gtk/MainThreadGtk.cpp:43
#16 0x00007fc6693e3c63 in g_timeout_dispatch (source=source at entry=0x1f579e0, 
    callback=<optimized out>, user_data=<optimized out>) at gmain.c:4450
#17 0x00007fc6693e3106 in g_main_dispatch (context=0x1d2e1e0) at gmain.c:3065
#18 g_main_context_dispatch (context=context at entry=0x1d2e1e0) at gmain.c:3641
#19 0x00007fc6693e3458 in g_main_context_iterate (context=0x1d2e1e0, block=block at entry=1, 
    dispatch=dispatch at entry=1, self=<optimized out>) at gmain.c:3712
#20 0x00007fc6693e385a in g_main_loop_run (loop=0x1dd2e80) at gmain.c:3906
#21 0x00007fc66d5c6f7a in WebCore::RunLoop::run ()
    at ../../Source/WebCore/platform/gtk/RunLoopGtk.cpp:61
#22 0x00007fc66be6209b in WebKit::WebProcessMainGtk (argc=2, argv=0x7fff45a87888)
    at ../../Source/WebKit2/WebProcess/gtk/WebProcessMainGtk.cpp:78
#23 0x000000000040095d in main (argc=2, argv=0x7fff45a87888)
    at ../../Source/WebKit2/gtk/MainGtk.cpp:31
(gdb) f 0
#0  0x00007fc66cfd50f9 in WebCore::MediaStreamTrackPrivate::setReadyState (this=0x21d1e90, 
    state=WebCore::MediaStreamSource::Live)
    at ../../Source/WebCore/platform/mediastream/MediaStreamTrackPrivate.cpp:191
191            m_client->trackReadyStateChanged();
(gdb) p m_client
$1 = (WebCore::MediaStreamTrackPrivateClient *) 0x40

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