202079 2019-09-21 14:24:03 -0700 REGRESSION(r249205?): [GStreamer] Crash in WebCore::VideoTrackPrivate::setSelected on youtube.com 2019-10-24 01:53:04 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build PC Linux RESOLVED FIXED P2 Normal --- 1 mcatanzaro webkit-unassigned aboya pnormand oldest_to_newest 1573090 0 379321 mcatanzaro 2019-09-21 14:24:03 -0700 Created attachment 379321 Backtrace Crash when trying to play youtube videos: Program terminated with signal SIGSEGV, Segmentation fault. #0 WebCore::VideoTrackPrivate::setSelected (selected=true, this=0x0) at ../Source/WebCore/platform/graphics/VideoTrackPrivate.h:46 46 if (m_selected == selected) [Current thread is 1 (Thread 0x7fc9f9b9a9c0 (LWP 23127))] (gdb) bt #0 0x00007fca022bee74 in WebCore::VideoTrackPrivate::setSelected(bool) (selected=true, this=0x0) at ../Source/WebCore/platform/graphics/VideoTrackPrivate.h:46 #1 0x00007fca022bee74 in WebCore::VideoTrackPrivateGStreamer::markAsActive() (this=0x0) at ../Source/WebCore/platform/graphics/gstreamer/VideoTrackPrivateGStreamer.cpp:80 #2 0x00007fca022b45cd in WebCore::MediaPlayerPrivateGStreamer::handleMessage(_GstMessage*) (this= 0x7fc8920693c0, message=0x55c3c20b3a00 [GstMessage]) at ../Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:1445 #3 0x00007fc9fbd10b78 in ffi_call_unix64 () at ../src/x86/unix64.S:76 #4 0x00007fc9fbd10374 in ffi_call (cif=cif@entry=0x7ffcce12f8e0, fn=fn@entry=0x7fca022b4f10 <WebCore::busMessageCallback(GstBus*, GstMessage*, WebCore::MediaPlayerPrivateGStreamer*)>, rvalue=<optimized out>, avalue=avalue@entry=0x7ffcce12f830) at ../src/x86/ffi64.c:525 #9 0x00007fc9feea69e3 in <emit signal message:streams-selected on instance 0x55c3c1bc3390 [GstBus]> (instance=instance@entry=0x55c3c1bc3390, signal_id=<optimized out>, detail=<optimized out>) at ../gobject/gsignal.c:3457 #5 0x00007fc9fee8a22d in g_cclosure_marshal_generic (closure=closure@entry=0x55c3c12174d0, return_gvalue=return_gvalue@entry=0x0, n_param_values=n_param_values@entry=2, param_values=param_values@entry=0x7ffcce12fb10, invocation_hint=invocation_hint@entry=0x7ffcce12fa90, marshal_data=marshal_data@entry=0x0) at ../gobject/gclosure.c:1500 #6 0x00007fc9fee89722 in g_closure_invoke (closure=0x55c3c12174d0, return_value=0x0, n_param_values=2, param_values=0x7ffcce12fb10, invocation_hint=0x7ffcce12fa90) at ../gobject/gclosure.c:810 #7 0x00007fc9fee9d584 in signal_emit_unlocked_R (node=node@entry=0x55c3c1af95e0, detail=detail@entry=1426, instance=instance@entry=0x55c3c1bc3390, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffcce12fb10) at ../gobject/gsignal.c:3645 #8 0x00007fc9feea6357 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7ffcce12fce0) at ../gobject/gsignal.c:3401 #10 0x00007fc9fcc9b8ec in gst_bus_async_signal_func (bus=0x55c3c1bc3390 [GstBus], message=0x55c3c20b3a00 [GstMessage], data=<optimized out>) at ../gst/gstbus.c:1261 #11 0x00007fc9fcc9c772 in gst_bus_source_dispatch (source=0x55c3c1217410, callback=0x7fc9fcc9b890 <gst_bus_async_signal_func>, user_data=0x0) at ../gst/gstbus.c:839 #12 0x00007fc9fed9e4be in g_main_dispatch (context=0x55c3c0fdbd90) at ../glib/gmain.c:3180 #13 0x00007fc9fed9e4be in g_main_context_dispatch (context=context@entry=0x55c3c0fdbd90) at ../glib/gmain.c:3845 #14 0x00007fc9fed9e870 in g_main_context_iterate (context=0x55c3c0fdbd90, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:3918 #15 0x00007fc9fed9eb63 in g_main_loop_run (loop=0x55c3c1086470) at ../glib/gmain.c:4112 #16 0x00007fc9fe7492b0 in WTF::RunLoop::run() () at ../Source/WTF/wtf/glib/RunLoopGLib.cpp:96 #17 0x00007fca00b8a76a in WebKit::AuxiliaryProcessMain<WebKit::WebProcess, WebKit::WebProcessMain>(int, char**) (argc=3, argv=<optimized out>) at ../Source/WebKit/Shared/unix/AuxiliaryProcessMain.h:47 #18 0x00007fc9ffcea173 in __libc_start_main (main= 0x55c3bfd057e0 <main(int, char**)>, argc=3, argv=0x7ffcce1300b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcce1300a8) at ../csu/libc-start.c:308 #19 0x000055c3bfd0586e in _start () at ../sysdeps/x86_64/start.S:120 Full backtrace attached 1583279 1 aboya 2019-10-24 01:53:04 -0700 The bug should not happen anymore with the revert, and the next version of the patch should avoid it. 379321 2019-09-21 14:24:03 -0700 2019-09-21 14:24:03 -0700 Backtrace gdb.txt text/plain 10585 mcatanzaro IzAgIDB4MDAwMDdmY2EwMjJiZWU3NCBpbiBXZWJDb3JlOjpWaWRlb1RyYWNrUHJpdmF0ZTo6c2V0 U2VsZWN0ZWQoYm9vbCkgKHNlbGVjdGVkPXRydWUsIHRoaXM9MHgwKQogICAgYXQgLi4vU291cmNl L1dlYkNvcmUvcGxhdGZvcm0vZ3JhcGhpY3MvVmlkZW9UcmFja1ByaXZhdGUuaDo0NgojMSAgMHgw MDAwN2ZjYTAyMmJlZTc0IGluIFdlYkNvcmU6OlZpZGVvVHJhY2tQcml2YXRlR1N0cmVhbWVyOjpt 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