[Webkit-unassigned] [Bug 83377] New: Setting mode for track element results in tab crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=83377

           Summary: Setting mode for track element results in tab crash
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: annacc at chromium.org
                CC: eric.carlson at apple.com, vcarbune at adobe.com
            Blocks: 43668


If the TextTrack mode is set from JavaScript, the tab crashes.

For example: http://www.annacavender.com/track/demo1/track-setmode.html

Crash log:

ASSERTION FAILED: cue->isActive()
<snip>WebKit/Source/WebCore/WebCore.gyp/../html/shadow/MediaControlElements.cpp(1284) : void WebCore::MediaControlTextTrackContainerElement::updateDisplay()
1   0x1d240aa8 WebCore::MediaControlTextTrackContainerElement::updateDisplay()
2   0x1d25046c WebCore::MediaControlRootElementChromium::updateTextTrackDisplay()
3   0x1d0cf731 WebCore::HTMLMediaElement::updateActiveTextTrackCues(float)
4   0x1d0c9bbf WebCore::HTMLMediaElement::playbackProgressTimerFired(WebCore::Timer<WebCore::HTMLMediaElement>*)
5   0x1d0f2647 WebCore::Timer<WebCore::HTMLMediaElement>::fired()
6   0x1d2cfdee WebCore::ThreadTimers::sharedTimerFiredInternal()
7   0x1d2cfb7f WebCore::ThreadTimers::sharedTimerFired()
8   0x1ec16ba9 webkit_glue::WebKitPlatformSupportImpl::DoTimeout()
9   0x1ec17fd4 base::internal::RunnableAdapter<void (webkit_glue::WebKitPlatformSupportImpl::*)()>::Run(webkit_glue::WebKitPlatformSupportImpl*)
10  0x1ec17ed3 base::internal::InvokeHelper<false, void, base::internal::RunnableAdapter<void (webkit_glue::WebKitPlatformSupportImpl::*)()>, void ()(webkit_glue::WebKitPlatformSupportImpl*)>::MakeItSo(base::internal::RunnableAdapter<void (webkit_glue::WebKitPlatformSupportImpl::*)()>, webkit_glue::WebKitPlatformSupportImpl*)
11  0x1ec17e13 base::internal::Invoker<1, base::internal::BindState<base::internal::RunnableAdapter<void (webkit_glue::WebKitPlatformSupportImpl::*)()>, void ()(webkit_glue::WebKitPlatformSupportImpl*), void ()(base::internal::UnretainedWrapper<webkit_glue::WebKitPlatformSupportImpl>)>, void ()(webkit_glue::WebKitPlatformSupportImpl*)>::Run(base::internal::BindStateBase*)
12  0x1a59e6bb base::Callback<void ()()>::Run() const
13  0x1ad05b5b base::Timer::RunScheduledTask()
14  0x1ad05d69 base::BaseTimerTaskInternal::Run()
15  0x1ad06634 base::internal::RunnableAdapter<void (base::BaseTimerTaskInternal::*)()>::Run(base::BaseTimerTaskInternal*)
16  0x1ad06533 base::internal::InvokeHelper<false, void, base::internal::RunnableAdapter<void (base::BaseTimerTaskInternal::*)()>, void ()(base::BaseTimerTaskInternal*)>::MakeItSo(base::internal::RunnableAdapter<void (base::BaseTimerTaskInternal::*)()>, base::BaseTimerTaskInternal*)
17  0x1ad0646e base::internal::Invoker<1, base::internal::BindState<base::internal::RunnableAdapter<void (base::BaseTimerTaskInternal::*)()>, void ()(base::BaseTimerTaskInternal*), void ()(base::internal::OwnedWrapper<base::BaseTimerTaskInternal>)>, void ()(base::BaseTimerTaskInternal*)>::Run(base::internal::BindStateBase*)
18  0x1a59e6bb base::Callback<void ()()>::Run() const
19  0x1ac4744e MessageLoop::RunTask(base::PendingTask const&)
20  0x1ac477f1 MessageLoop::DeferOrRunPendingTask(base::PendingTask const&)
21  0x1ac47d83 MessageLoop::DoDelayedWork(base::TimeTicks*)
22  0x1abb17c8 base::MessagePumpCFRunLoopBase::RunWork()
23  0x1abb0e92 base::MessagePumpCFRunLoopBase::RunWorkSource(void*)
24  0x9951b42b __CFRunLoopDoSources0
25  0x99518eef __CFRunLoopRun
26  0x995183c4 CFRunLoopRunSpecific
27  0x995181f1 CFRunLoopRunInMode
28  0x961671b3 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
29  0x1abb21f9 base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*)
30  0x1abb148d base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*)
31  0x1ac46db3 MessageLoop::RunInternal()
Program received signal:  “EXC_BAD_ACCESS”.
[Switching to process 44366]
[Switching to process 44366]
sharedlibrary apply-load-rules all
(gdb)

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