Bug 105580 – REGRESSION: media/track/track-prefer-captions.html crashes intermittently on Mac

• Component: Media
• Status: RESOLVED FIXED

[Ryosuke Niwa]

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20webkit.org&tests=media%2Ftrack%2Ftrack-prefer-captions.html

Stack trace:
http://build.webkit.org/results/Apple%20MountainLion%20Release%20WK1%20(Tests)/r138293%20(5052)/media/track/track-prefer-captions-crash-log.txt
0   com.apple.WebCore             	0x0000000106c50933 WebCore::HTMLMediaElement::removeTrack(WebCore::TextTrack*) + 67 (HTMLMediaElement.cpp:2805)
1   com.apple.WebCore             	0x0000000106c50e7d WebCore::HTMLMediaElement::didRemoveTrack(WebCore::HTMLTrackElement*) + 93 (HTMLMediaElement.cpp:4267)
2   com.apple.WebCore             	0x0000000106c9a6a5 WebCore::HTMLTrackElement::removedFrom(WebCore::ContainerNode*) + 85 (HTMLTrackElement.cpp:92)
3   com.apple.WebCore             	0x00000001068ff346 WebCore::Private::NodeRemovalDispatcher<WebCore::Node, WebCore::ContainerNode, true>::dispatch(WebCore::Node*, WebCore::ContainerNode*) + 70 (Node.h:724)
4   com.apple.WebCore             	0x00000001068fecca void WebCore::removeAllChildrenInContainer<WebCore::Node, WebCore::ContainerNode>(WebCore::ContainerNode*) + 378 (TreeShared.h:77)
5   com.apple.WebCore             	0x00000001069e854b WebCore::Document::removedLastRef() + 539 (OwnPtr.h:72)
6   com.apple.WebCore             	0x0000000106f458cb WebCore::JSNodeOwner::finalize(JSC::Handle<JSC::Unknown>, void*) + 59 (JSNode.h:69)
7   com.apple.JavaScriptCore      	0x0000000106255f4c JSC::WeakBlock::sweep() + 108 (WeakImpl.h:84)
8   com.apple.JavaScriptCore      	0x00000001062562b8 JSC::WeakSet::sweep() + 40 (DoublyLinkedList.h:118)
9   com.apple.JavaScriptCore      	0x000000010618d2d8 JSC::MarkedBlock::sweep(JSC::MarkedBlock::SweepMode) + 24 (MarkedBlock.cpp:112)
10  com.apple.JavaScriptCore      	0x0000000106254fa3 JSC::MarkedAllocator::allocateSlowCase(unsigned long) + 99 (MarkedAllocator.cpp:34)
11  com.apple.JavaScriptCore      	0x000000010614a52d JSC::FunctionPrototype::create(JSC::ExecState*, JSC::JSGlobalObject*, JSC::Structure*) + 77 (MarkedAllocator.h:78)
12  com.apple.JavaScriptCore      	0x0000000106145c21 JSC::JSGlobalObject::reset(JSC::JSValue) + 209 (JSGlobalObject.cpp:202)
13  com.apple.WebCore             	0x0000000106e55ae3 WebCore::JSDOMWindowBase::finishCreation(JSC::JSGlobalData&, WebCore::JSDOMWindowShell*) + 35 (JSDOMWindowBase.cpp:69)
14  com.apple.WebCore             	0x0000000106e5a53f WebCore::JSDOMWindow::create(JSC::JSGlobalData&, JSC::Structure*, WTF::PassRefPtr<WebCore::DOMWindow>, WebCore::JSDOMWindowShell*) + 175 (JSDOMWindow.h:42)
15  com.apple.WebCore             	0x0000000106e5a23c WebCore::JSDOMWindowShell::setWindow(WTF::PassRefPtr<WebCore::DOMWindow>) + 380 (JSDOMWindowShell.cpp:75)
16  com.apple.WebCore             	0x0000000107328124 WebCore::ScriptController::clearWindowShell(WebCore::DOMWindow*, bool) + 276 (PassRefPtr.h:68)
17  com.apple.WebCore             	0x0000000106b8dfaf WebCore::FrameLoader::clear(WebCore::Document*, bool, bool, bool) + 271 (FrameLoader.cpp:568)
18  com.apple.WebCore             	0x0000000106a14f71 WebCore::DocumentWriter::begin(WebCore::KURL const&, bool, WebCore::Document*) + 369 (DocumentWriter.cpp:135)
19  com.apple.WebCore             	0x0000000106a04beb WebCore::DocumentLoader::commitData(char const*, unsigned long) + 91 (RefPtr.h:56)
20  com.apple.WebKit              	0x000000010656c7b4 -[WebHTMLRepresentation receivedData:withDataSource:] + 100 (WebHTMLRepresentation.mm:186)
21  com.apple.WebKit              	0x000000010653f49d -[WebDataSource(WebInternal) _receivedData:] + 77 (WebDataSource.mm:216)
22  com.apple.WebKit              	0x00000001065574f7 WebFrameLoaderClient::committedLoad(WebCore::DocumentLoader*, char const*, int) + 103 (WebFrameLoaderClient.mm:841)
23  com.apple.WebCore             	0x0000000106a04e30 WebCore::DocumentLoader::commitLoad(char const*, int) + 144 (RefCounted.h:148)
24  com.apple.WebCore             	0x00000001070ef173 WebCore::MainResourceLoader::dataReceived(WebCore::CachedResource*, char const*, int) + 787 (MainResourceLoader.cpp:497)
25  com.apple.WebCore             	0x00000001068bb5c5 WebCore::CachedRawResource::data(WTF::PassRefPtr<WebCore::ResourceBuffer>, bool) + 309 (CachedRawResource.cpp:70)
26  com.apple.WebCore             	0x00000001073ff1fa WebCore::SubresourceLoader::sendDataToResource(char const*, int) + 122 (PassRefPtr.h:68)
27  com.apple.WebCore             	0x00000001073ff2dc WebCore::SubresourceLoader::didReceiveData(char const*, int, long long, bool) + 76 (ResourceLoader.h:142)
28  com.apple.WebCore             	0x0000000107308c38 WebCore::ResourceLoader::didReceiveData(WebCore::ResourceHandle*, char const*, int, int) + 136 (InspectorInstrumentation.h:260)
29  com.apple.Foundation          	0x00007fff87ee6f58 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke_0 + 28
30  com.apple.Foundation          	0x00007fff87ee6e9c -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 227
31  com.apple.Foundation          	0x00007fff87ee6d98 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 63
32  com.apple.Foundation          	0x00007fff87ee992b _NSURLConnectionDidReceiveData_LengthReceived + 86
33  com.apple.CFNetwork           	0x00007fff8971d7b1 ___delegate_didReceiveDataArray_block_invoke_0 + 132
34  com.apple.CFNetwork           	0x00007fff89710753 ___withDelegateAsync_block_invoke_0 + 90
35  com.apple.CFNetwork           	0x00007fff8979f2ca __block_global_1 + 28
36  com.apple.CoreFoundation      	0x00007fff92f8c724 CFArrayApplyFunction + 68
37  com.apple.CFNetwork           	0x00007fff89701a6c RunloopBlockContext::perform() + 126
38  com.apple.CFNetwork           	0x00007fff8970194b MultiplexerSource::perform() + 221
39  com.apple.CoreFoundation      	0x00007fff92f6e101 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
40  com.apple.CoreFoundation      	0x00007fff92f6da25 __CFRunLoopDoSources0 + 245
41  com.apple.CoreFoundation      	0x00007fff92f90dc5 __CFRunLoopRun + 789
42  com.apple.CoreFoundation      	0x00007fff92f906b2 CFRunLoopRunSpecific + 290
43  com.apple.Foundation          	0x00007fff87f6489e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 268
44  DumpRenderTree                	0x0000000105e714c9 runTest(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) + 1624 (DumpRenderTree.mm:1378)
45  DumpRenderTree                	0x0000000105e70c54 dumpRenderTree(int, char const**) + 1855 (DumpRenderTree.mm:842)
46  DumpRenderTree                	0x0000000105e71832 main + 86 (DumpRenderTree.mm:927)
47  libdyld.dylib                 	0x00007fff89a677e1 start + 1

[Ryosuke Niwa]

Added a test expectation in http://trac.webkit.org/changeset/138304.

[Zan Dobersek]

This stopped crashing on all ports after r138381.
http://trac.webkit.org/changeset/138381

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20webkit.org&showAllRuns=true&tests=media%2Ftrack%2Ftrack-prefer-captions.html

[Ryosuke Niwa]

Removed in http://trac.webkit.org/changeset/139176.