http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=media%2Ftrack%2Ftrack-delete-during-setup.html e.g.: crash log for DumpRenderTree (pid 59250): STDOUT: <empty> STDERR: SHOULD NEVER BE REACHED STDERR: third_party/WebKit/Source/WebCore/html/track/LoadableTextTrack.cpp(147) : size_t WebCore::LoadableTextTrack::trackElementIndex() STDERR: 1 0x1055971 STDERR: 2 0x105ad60 STDERR: 3 0xf9093a STDERR: 4 0xfc0f1e STDERR: 5 0x6b5475 STDERR: 6 0x6b38fe STDERR: 7 0x73efcc STDERR: 8 0x132b229 STDERR: 9 0xb2bcdd STDERR: 10 0xb26774 STDERR: 11 0xb26745 STDERR: 12 0x2394a280618e STDERR: [59250:59250:18391688772239:ERROR:process_util_posix.cc(142)] Received signal 11 STDERR: base::debug::StackTrace::StackTrace() [0x857dea] STDERR: base::(anonymous namespace)::StackDumpSignalHandler() [0x8119cd] STDERR: 0x7f1c92354af0 STDERR: WebCore::LoadableTextTrack::trackElementIndex() [0x105597b] STDERR: WebCore::TextTrackList::append() [0x105ad60] STDERR: WebCore::HTMLMediaElement::didAddTrack() [0xf9093a] STDERR: WebCore::HTMLTrackElement::insertedIntoTree() [0xfc0f1e] STDERR: WebCore::notifyChildInserted() [0x6b5475] STDERR: WebCore::ContainerNode::appendChild() [0x6b38fe] STDERR: WebCore::Node::appendChild() [0x73efcc] STDERR: WebCore::V8Node::appendChildCallback() [0x132b229] STDERR: v8::internal::HandleApiCallHelper<>() [0xb2bcdd] STDERR: v8::internal::Builtin_Impl_HandleApiCall() [0xb26774] STDERR: v8::internal::Builtin_HandleApiCall() [0xb26745] STDERR: 0x2394a280618e Eric, Emil tells me you might've been working in this area and seen this crash before? he mentioned you had track-related changes in r111581 and 111941 ?
Adam wrote this up yesterday as https://bugs.webkit.org/show_bug.cgi?id=82269, I just haven't had a spare minute to look into it yet. *** This bug has been marked as a duplicate of bug 82269 ***