Bug 396912 - Infinite notifications 'An application needs additional multimedia codecs'
Summary: Infinite notifications 'An application needs additional multimedia codecs'
Status: REPORTED
Alias: None
Product: Phonon
Classification: Frameworks and Libraries
Component: general (show other bugs)
Version: unspecified
Platform: openSUSE Linux
: NOR normal
Target Milestone: ---
Assignee: Unassigned bugs mailing-list
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-07-27 17:15 UTC by Antonio Larrosa
Modified: 2022-12-08 13:37 UTC (History)
8 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

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2018-08-02 18:31 UTC, Fabian Vogt 		Details
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Description Antonio Larrosa 2018-07-27 17:15:34 UTC 
I'm getting infinite notifications in plasma saying "An application needs additional multimedia codecs" and a button to install ogg vorbis decoders (which I had installed). If I open the notification applet in plasma and clear the whole notifications history, it's filled again with the same messages instantaneously (at least 10 notifications/second, but it happens so fast it's difficult to count).

This notification is the same that is shown when running 


After some debugging, I found that this notification is run by phonon executing:

/usr/lib/gst-install-plugins-helper "gstreamer|1.0|plasmashell|decodificador Vorbis|decoder-audio/x-vorbis"

(this can be run manually to reproduce the message)

That command is run by PluginInstaller::addPlugin in phonon-gstreamer, when calling gst_install_plugins_async . 
It seems gstreamer has an internal loop that at some point calls the Phonon::Gstreamer::Pipeline::cb_error callback. This calls PluginInstaller::checkInstalledPlugins [see backtrace 1 below] and at this poing, PluginInstaller's m_state is Idle, m_pluginList is empty and m_descList is a list containing one string: "gstreamer|1.0|plasmashell|decodificador Vorbis|decoder-audio/x-vorbis", so the condition (!allFound || m_descList.size() > 0) is true and so it tries to install the codec by running the above command.

I set a breakpoint in Phonon::Gstreamer::PluginInstaller::pluginInstallationResult and noticed that the result is always GST_INSTALL_PLUGINS_SUCCESS. This makes sense, since I checked gst-install-plugins-helper is trying to using packagekit to install something that provides "gstreamer1(decoder-audio/x-vorbis)()(64bit)" and I have the gstreamer-plugins-base package installed, which provides that capability.

I tried replacing the binary /usr/lib/gst-install-plugins-helper with a symlink to /bin/true to check if maybe each notification was somehow generating the next one (for example, because plasma tried to play a sound and this would fail, generate a new notification, which would try to play another sound...), but no. Replacing the command with 'true' stopped the notifications, but I could still see in gdb that it's executing it continuously as fast as the cpu allows.

I was tempted to try to fix this by making Phonon:Gstreamer::PluginInstaller have a check that doesn't try to install the same plugin more than once per minute, or something like that, but the above test shows that this is not a valid fix.

Btw, while trying to understand phonon's code I noticed that PluginInstaller's m_pluginList is always empty as PluginInstaller::addPlugin(GstMessage *gstMessage) is called in each iteration, but PluginInstaller::addPlugin(const QString &name, PluginType type) is never called (which is the only method that inserts anything into m_pluginList.

I wondered if maybe filing this bug entry for phonon, but I'm not sure and since it's plasmashell the process trying to play sound I thought I'd start here, and maybe later we can move it to phonon.

Any idea of what else to try? I'll leave plasmashell stopped in gdb as long as I can in order to continue testing this, as this problem happened to me other times and it's difficult to reproduce.

This all happens in openSUSE Tumbleweed with plasma 5.13.3, phonon4qt5-4.10.1, phonon4qt5-backend-gstreamer 4.9.0, gstreamer 1.14.1, pulseaudio 12.0, Frameworks 5.47.0 and Qt 5.11.1, but I've seen the problem with older versions too (I can't recall the first time I had this problem, but it was many months ago).

[backtrace 1]

#0  0x00007f9f2e956f95 in Phonon::Gstreamer::PluginInstaller::checkInstalledPlugins() (this=0x555ad29b5060) at /usr/src/debug/phonon4qt5-backend-gstreamer-4.9.0-1.8.x86_64/gstreamer/plugininstaller.cpp:253
#1  0x00007f9f2e94deee in Phonon::Gstreamer::Pipeline::cb_error(_GstBus*, _GstMessage*, void*) (bus=<optimized out>, gstMessage=0x555b21f44310, data=0x555ad2731800)
    at /usr/src/debug/phonon4qt5-backend-gstreamer-4.9.0-1.8.x86_64/gstreamer/pipeline.cpp:500
#2  0x00007fa0114826c5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
#3  0x00007fa011481bd7 in ffi_call_int (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:662
#4  0x00007f9f61f78565 in g_cclosure_marshal_generic () at /usr/lib64/libgobject-2.0.so.0
#5  0x00007f9f61f77aed in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#6  0x00007f9f61f8ab13 in  () at /usr/lib64/libgobject-2.0.so.0
#7  0x00007f9f61f93b4a in g_signal_emit_valist () at /usr/lib64/libgobject-2.0.so.0
#8  0x00007f9f61f9419f in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#9  0x00007f9f3a3853f4 in gst_bus_sync_signal_handler (bus=bus@entry=0x555ad27c3470, message=message@entry=0x555b21f44310, data=data@entry=0x0) at gstbus.c:1280
#10 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad27c3470, message=message@entry=0x555b21f44310) at gstbus.c:336
#11 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x555ad2b2c040, message=0x555b21f44310) at gstelement.c:1990
#12 0x00007f9f3a376ecd in gst_bin_post_message (element=0x555ad2b2c040, msg=0x555b21f44310) at ../gst/gstmessage.h:366
#13 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x555ad2b2c040, message=message@entry=0x555b21f44310) at gstelement.c:2033
#14 0x00007f9f3a3771ce in gst_bin_handle_message_func (bin=0x555ad2b2c040, message=0x555b21f44310) at gstbin.c:4053
#15 0x00007f9f3a3c4c59 in gst_pipeline_handle_message (bin=0x555ad2b2c040, message=0x555b21f44310) at gstpipeline.c:616
#16 0x00007f9f2c6a80e5 in gst_play_bin_handle_message (bin=0x555ad2b2c040, msg=0x555b21f44310) at gstplaybin2.c:3012
#17 0x00007f9f3a3749e8 in bin_bus_handler (bus=bus@entry=0x555ad27c33a0, message=message@entry=0x555b21f44310, bin=bin@entry=0x555ad2b2c040) at gstbin.c:3273
#18 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad27c33a0, message=message@entry=0x555b21f44310) at gstbus.c:336
#19 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x7f9f0002d890, message=0x555b21f44310) at gstelement.c:1990
#20 0x00007f9f3a376ecd in gst_bin_post_message (element=0x7f9f0002d890, msg=0x555b21f44310) at ../gst/gstmessage.h:366
#21 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x7f9f0002d890, message=0x555b21f44310) at gstelement.c:2033
#22 0x00007f9f3a39e63e in gst_element_message_full_with_details (element=0x7f9f0002d890, type=GST_MESSAGE_ERROR, domain=2751, code=12, text=<optimized out>, debug=<optimized out>, file=0x7f9f2c6d5e5d "gsturidecodebin.c", function=0x7f9f2c6d6f70 <__PRETTY_FUNCTION__.21440> "no_more_pads_full", line=988, structure=0x0) at gstelement.c:2169
#23 0x00007f9f3a39e7a8 in gst_element_message_full (element=element@entry=0x7f9f0002d890, type=type@entry=GST_MESSAGE_ERROR, domain=<optimized out>, code=code@entry=12, text=text@entry=0x0, debug=debug@entry=0x7f9e484591e0 "\200=DH\236\177", file=0x7f9f2c6d5e5d "gsturidecodebin.c", function=0x7f9f2c6d6f70 <__PRETTY_FUNCTION__.21440> "no_more_pads_full", line=988) at gstelement.c:2208
#24 0x00007f9f2c68f20d in no_more_pads_full (element=<optimized out>, decoder=decoder@entry=0x7f9f0002d890, subs=0) at gsturidecodebin.c:987
#25 0x00007f9f2c68f68a in handle_message (bin=0x7f9f0002d890, msg=0x7f9e4844a200) at gsturidecodebin.c:2493
#26 0x00007f9f3a3749e8 in bin_bus_handler (bus=bus@entry=0x555ad2b36300, message=message@entry=0x7f9e4844a200, bin=bin@entry=0x7f9f0002d890) at gstbin.c:3273
#27 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad2b36300, message=message@entry=0x7f9e4844a200) at gstbus.c:336
#28 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x555ad2b3e320, message=0x7f9e4844a200) at gstelement.c:1990
#29 0x00007f9f3a376ecd in gst_bin_post_message (element=0x555ad2b3e320, msg=0x7f9e4844a200) at ../gst/gstmessage.h:366
#30 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x555ad2b3e320, message=0x7f9e4844a200) at gstelement.c:2033
#31 0x00007f9f3a39e63e in gst_element_message_full_with_details (element=0x555ad2b3e320, type=GST_MESSAGE_ERROR, domain=2751, code=12, text=<optimized out>, debug=<optimized out>, file=0x7f9f2c6d14c9 "gstdecodebin2.c", function=0x7f9f2c6d3d10 <__PRETTY_FUNCTION__.28041> "gst_decode_bin_expose", line=4640, structure=0x0) at gstelement.c:2169
#32 0x00007f9f3a39e7a8 in gst_element_message_full (element=element@entry=0x555ad2b3e320, type=type@entry=GST_MESSAGE_ERROR, domain=<optimized out>, code=code@entry=12, text=text@entry=0x0, debug=debug@entry=0x7f9e48443d90 "\020\a", file=0x7f9f2c6d14c9 "gstdecodebin2.c", function=0x7f9f2c6d3d10 <__PRETTY_FUNCTION__.28041> "gst_decode_bin_expose", line=4640) at gstelement.c:2208
#33 0x00007f9f2c67ce23 in gst_decode_bin_expose (dbin=0x555ad2b3e320) at gstdecodebin2.c:4639
#34 0x00007f9f2c67e161 in no_more_pads_cb (element=<optimized out>, chain=0x7f9e5aa400a0) at gstdecodebin2.c:3100
#35 0x00007fa0114826c5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
#36 0x00007fa011481bd7 in ffi_call_int (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:662
#37 0x00007f9f61f78565 in g_cclosure_marshal_generic () at /usr/lib64/libgobject-2.0.so.0
#38 0x00007f9f61f77aed in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#39 0x00007f9f61f8ab13 in  () at /usr/lib64/libgobject-2.0.so.0
#40 0x00007f9f61f93b4a in g_signal_emit_valist () at /usr/lib64/libgobject-2.0.so.0
#41 0x00007f9f61f9419f in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#42 0x00007f9f3a39c6dd in gst_element_no_more_pads (element=<optimized out>) at gstelement.c:870
#43 0x00007f9f2c2262e3 in gst_ogg_demux_activate_chain (ogg=ogg@entry=0x7f9e4d996400, chain=chain@entry=0x7f9e4511e770, event=event@entry=0x7f9f00038980) at gstoggdemux.c:3018
#44 0x00007f9f2c22b2aa in gst_ogg_demux_perform_seek_pull (ogg=ogg@entry=0x7f9e4d996400, event=event@entry=0x0) at gstoggdemux.c:3672
#45 0x00007f9f2c22fa45 in gst_ogg_demux_loop (pad=<optimized out>) at gstoggdemux.c:4861
#46 0x00007f9f3a3ed021 in gst_task_func (task=0x7f9e511c1ef0) at gsttask.c:332
#47 0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#48 0x00007fa011904c45 in g_thread_proxy (data=0x7f9e502eae80) at gthread.c:784
#49 0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#50 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6


[backtrace of all threads]

(gdb) thread apply all bt

Thread 5915 (Thread 0x7f9f2f57e700 (LWP 21957)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa00f2729b1 in poll (__timeout=-1, __nfds=3, __fds=0x7f9eec0bfa90) at /usr/include/bits/poll2.h:46
#2  0x00007fa00f2729b1 in poll_func (ufds=0x7f9eec0bfa90, nfds=3, timeout=-1, userdata=0x555aec14cef0) at pulse/thread-mainloop.c:69
#3  0x00007fa00f2641e0 in pa_mainloop_poll (m=m@entry=0x555ae5e8df20) at pulse/mainloop.c:824
#4  0x00007fa00f26482e in pa_mainloop_iterate (m=0x555ae5e8df20, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007fa00f2648e0 in pa_mainloop_run (m=0x555ae5e8df20, retval=retval@entry=0x0) at pulse/mainloop.c:945
#6  0x00007fa00f2728f9 in thread (userdata=0x555b200ad510) at pulse/thread-mainloop.c:100
#7  0x00007fa00d474668 in internal_thread_func (userdata=0x555ae8e99f50) at pulsecore/thread-posix.c:81
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 19 (Thread 0x7f9f0affd700 (LWP 30141)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa011922c5f in g_cond_wait (cond=cond@entry=0x7f9ec003cd78, mutex=mutex@entry=0x7f9ec003cd68) at gthread-posix.c:1402
#2  0x00007f9f3a6cf0db in _gst_data_queue_wait_non_empty (queue=queue@entry=0x7f9ec003cdc0) at gstdataqueue.c:554
#3  0x00007f9f3a6d0430 in gst_data_queue_pop (queue=0x7f9ec003cdc0, item=item@entry=0x7f9f0affccb0) at gstdataqueue.c:596
#4  0x00007f9f2cb28bd1 in gst_multi_queue_loop (pad=<optimized out>) at gstmultiqueue.c:1809
#5  0x00007f9f3a3ed021 in gst_task_func (task=0x7f9e46c07ef0) at gsttask.c:332
#6  0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#7  0x00007fa011904c45 in g_thread_proxy (data=0x7f9e59ed5a80) at gthread.c:784
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7f9f09ded700 (LWP 23915)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa011922c5f in g_cond_wait (cond=cond@entry=0x7f9e49f16530, mutex=mutex@entry=0x7f9e49f164e8) at gthread-posix.c:1402
#2  0x00007f9f3a3ed21b in gst_task_func (task=0x7f9e49f164d0) at gsttask.c:317
#3  0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#4  0x00007fa011904c45 in g_thread_proxy (data=0x7f9e503bd140) at gthread.c:784
#5  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f9f08deb700 (LWP 23415)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa011922c5f in g_cond_wait (cond=cond@entry=0x7f9efc0124d8, mutex=mutex@entry=0x7f9efc0124c8) at gthread-posix.c:1402
#2  0x00007f9f3a6cf0db in _gst_data_queue_wait_non_empty (queue=queue@entry=0x7f9efc012520) at gstdataqueue.c:554
#3  0x00007f9f3a6d0430 in gst_data_queue_pop (queue=0x7f9efc012520, item=item@entry=0x7f9f08deacb0) at gstdataqueue.c:596
#4  0x00007f9f2cb28bd1 in gst_multi_queue_loop (pad=<optimized out>) at gstmultiqueue.c:1809
#5  0x00007f9f3a3ed021 in gst_task_func (task=0x555b2406a830) at gsttask.c:332
#6  0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#7  0x00007fa011904c45 in g_thread_proxy (data=0x7f9e502eae80) at gthread.c:784
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f9f19c72700 (LWP 23414)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa011922c5f in g_cond_wait (cond=cond@entry=0x7f9e49f16650, mutex=mutex@entry=0x7f9e49f16608) at gthread-posix.c:1402
#2  0x00007f9f3a3ed21b in gst_task_func (task=0x7f9e49f165f0) at gsttask.c:317
#3  0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#4  0x00007fa011904c45 in g_thread_proxy (data=0x7f9e441d2ed0) at gthread.c:784
#5  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f9f095ec700 (LWP 23340)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa011922c5f in g_cond_wait (cond=cond@entry=0x555b2406abf0, mutex=mutex@entry=0x555b2406aba8) at gthread-posix.c:1402
---Type <return> to continue, or q <return> to quit---
#2  0x00007f9f3a3ed21b in gst_task_func (task=0x555b2406ab90) at gsttask.c:317
#3  0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#4  0x00007fa011904c45 in g_thread_proxy (data=0x7f9f00003c50) at gthread.c:784
#5  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f9f18c70700 (LWP 23244)):
#0  0x00007fa01778eaf3 in fork () at /lib64/libc.so.6
#1  0x00007fa011924128 in fork_exec_with_pipes (intermediate_child=0, working_directory=0x0, argv=0x7f9e4f3e9ed0, envp=0x0, close_descriptors=1, search_path=search_path@entry=0, search_path_from_envp=0, stdout_to_null=0, stderr_to_null=0, child_inherits_stdin=0, file_and_argv_zero=0, cloexec_pipes=0, child_setup=0x0, user_data=0x0, child_pid=0x7f9f18c6e344, standard_input=0x0, standard_output=0x0, standard_error=0x0, error=0x7f9f18c6e2f0)
    at gspawn.c:1385
#2  0x00007fa011924fbe in g_spawn_async_with_pipes (working_directory=<optimized out>, argv=<optimized out>, envp=<optimized out>, flags=<optimized out>, child_setup=<optimized out>, user_data=<optimized out>, child_pid=0x7f9f18c6e344, standard_input=0x0, standard_output=0x0, standard_error=0x0, error=0x7f9f18c6e2f0) at gspawn.c:709
#3  0x00007fa0119250b0 in g_spawn_async (working_directory=<optimized out>, argv=<optimized out>, envp=<optimized out>, flags=<optimized out>, child_setup=<optimized out>, user_data=<optimized out>, child_pid=0x7f9f18c6e344, error=0x7f9f18c6e2f0) at gspawn.c:190
#4  0x00007f9f3a11f91c in  () at /usr/lib64/libgstpbutils-1.0.so.0
#5  0x00007f9f3a11fd38 in gst_install_plugins_async () at /usr/lib64/libgstpbutils-1.0.so.0
#6  0x00007f9f2e956c1f in Phonon::Gstreamer::PluginInstaller::run() (this=this@entry=0x555ad29b5060) at /usr/include/qt5/QtCore/qsharedpointer_impl.h:685
#7  0x00007f9f2e956f82 in Phonon::Gstreamer::PluginInstaller::checkInstalledPlugins() (this=0x555ad29b5060) at /usr/src/debug/phonon4qt5-backend-gstreamer-4.9.0-1.8.x86_64/gstreamer/plugininstaller.cpp:261
#8  0x00007f9f2e94deee in Phonon::Gstreamer::Pipeline::cb_error(_GstBus*, _GstMessage*, void*) (bus=<optimized out>, gstMessage=0x7f9e4f404080, data=0x555ad2731800)
    at /usr/src/debug/phonon4qt5-backend-gstreamer-4.9.0-1.8.x86_64/gstreamer/pipeline.cpp:500
#9  0x00007fa0114826c5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
#10 0x00007fa011481bd7 in ffi_call_int (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:662
#11 0x00007f9f61f78565 in g_cclosure_marshal_generic () at /usr/lib64/libgobject-2.0.so.0
#12 0x00007f9f61f77aed in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#13 0x00007f9f61f8ab13 in  () at /usr/lib64/libgobject-2.0.so.0
#14 0x00007f9f61f93b4a in g_signal_emit_valist () at /usr/lib64/libgobject-2.0.so.0
#15 0x00007f9f61f9419f in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#16 0x00007f9f3a3853f4 in gst_bus_sync_signal_handler (bus=bus@entry=0x555ad27c3470, message=message@entry=0x7f9e4f404080, data=data@entry=0x0) at gstbus.c:1280
#17 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad27c3470, message=message@entry=0x7f9e4f404080) at gstbus.c:336
#18 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x555ad2b2c040, message=0x7f9e4f404080) at gstelement.c:1990
#19 0x00007f9f3a376ecd in gst_bin_post_message (element=0x555ad2b2c040, msg=0x7f9e4f404080) at ../gst/gstmessage.h:366
#20 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x555ad2b2c040, message=message@entry=0x7f9e4f404080) at gstelement.c:2033
#21 0x00007f9f3a3771ce in gst_bin_handle_message_func (bin=0x555ad2b2c040, message=0x7f9e4f404080) at gstbin.c:4053
#22 0x00007f9f3a3c4c59 in gst_pipeline_handle_message (bin=0x555ad2b2c040, message=0x7f9e4f404080) at gstpipeline.c:616
#23 0x00007f9f2c6a80e5 in gst_play_bin_handle_message (bin=0x555ad2b2c040, msg=0x7f9e4f404080) at gstplaybin2.c:3012
#24 0x00007f9f3a3749e8 in bin_bus_handler (bus=bus@entry=0x555ad27c33a0, message=message@entry=0x7f9e4f404080, bin=bin@entry=0x555ad2b2c040) at gstbin.c:3273
#25 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad27c33a0, message=message@entry=0x7f9e4f404080) at gstbus.c:336
#26 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x7f9f0002d890, message=0x7f9e4f404080) at gstelement.c:1990
#27 0x00007f9f3a376ecd in gst_bin_post_message (element=0x7f9f0002d890, msg=0x7f9e4f404080) at ../gst/gstmessage.h:366
#28 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x7f9f0002d890, message=0x7f9e4f404080) at gstelement.c:2033
#29 0x00007f9f3a39e63e in gst_element_message_full_with_details (element=0x7f9f0002d890, type=GST_MESSAGE_ERROR, domain=2751, code=12, text=<optimized out>, debug=<optimized out>, file=0x7f9f2c6d5e5d "gsturidecodebin.c", function=0x7f9f2c6d6f70 <__PRETTY_FUNCTION__.21440> "no_more_pads_full", line=988, structure=0x0) at gstelement.c:2169
#30 0x00007f9f3a39e7a8 in gst_element_message_full (element=element@entry=0x7f9f0002d890, type=type@entry=GST_MESSAGE_ERROR, domain=<optimized out>, code=code@entry=12, text=text@entry=0x0, debug=debug@entry=0x7f9e4f40f1d0 "\020\263@O\236\177", file=0x7f9f2c6d5e5d "gsturidecodebin.c", function=0x7f9f2c6d6f70 <__PRETTY_FUNCTION__.21440> "no_more_pads_full", line=988) at gstelement.c:2208
#31 0x00007f9f2c68f20d in no_more_pads_full (element=<optimized out>, decoder=decoder@entry=0x7f9f0002d890, subs=0) at gsturidecodebin.c:987
#32 0x00007f9f2c68f68a in handle_message (bin=0x7f9f0002d890, msg=0x7f9e4f404000) at gsturidecodebin.c:2493
#33 0x00007f9f3a3749e8 in bin_bus_handler (bus=bus@entry=0x555ad2b36300, message=message@entry=0x7f9e4f404000, bin=bin@entry=0x7f9f0002d890) at gstbin.c:3273
#34 0x00007f9f3a3856ab in gst_bus_post (bus=bus@entry=0x555ad2b36300, message=message@entry=0x7f9e4f404000) at gstbus.c:336
#35 0x00007f9f3a39ae66 in gst_element_post_message_default (element=element@entry=0x555ad2b3e320, message=0x7f9e4f404000) at gstelement.c:1990
#36 0x00007f9f3a376ecd in gst_bin_post_message (element=0x555ad2b3e320, msg=0x7f9e4f404000) at ../gst/gstmessage.h:366
#37 0x00007f9f3a39e04a in gst_element_post_message (element=element@entry=0x555ad2b3e320, message=0x7f9e4f404000) at gstelement.c:2033
#38 0x00007f9f3a39e63e in gst_element_message_full_with_details (element=0x555ad2b3e320, type=GST_MESSAGE_ERROR, domain=2751, code=12, text=<optimized out>, debug=<optimized out>, file=0x7f9f2c6d14c9 "gstdecodebin2.c", function=0x7f9f2c6d3d10 <__PRETTY_FUNCTION__.28041> "gst_decode_bin_expose", line=4640, structure=0x0) at gstelement.c:2169
#39 0x00007f9f3a39e7a8 in gst_element_message_full (element=element@entry=0x555ad2b3e320, type=type@entry=GST_MESSAGE_ERROR, domain=<optimized out>, code=code@entry=12, text=text@entry=0x0, debug=debug@entry=0x7f9e4f3fe010 "\360'>O\236\177", file=0x7f9f2c6d14c9 "gstdecodebin2.c", function=0x7f9f2c6d3d10 <__PRETTY_FUNCTION__.28041> "gst_decode_bin_expose", line=4640) at gstelement.c:2208
#40 0x00007f9f2c67ce23 in gst_decode_bin_expose (dbin=0x555ad2b3e320) at gstdecodebin2.c:4639
#41 0x00007f9f2c67e161 in no_more_pads_cb (element=<optimized out>, chain=0x7f9e4048bbd0) at gstdecodebin2.c:3100
---Type <return> to continue, or q <return> to quit---
#42 0x00007fa0114826c5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
#43 0x00007fa011481bd7 in ffi_call_int (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:662
#44 0x00007f9f61f78565 in g_cclosure_marshal_generic () at /usr/lib64/libgobject-2.0.so.0
#45 0x00007f9f61f77aed in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#46 0x00007f9f61f8ab13 in  () at /usr/lib64/libgobject-2.0.so.0
#47 0x00007f9f61f93b4a in g_signal_emit_valist () at /usr/lib64/libgobject-2.0.so.0
#48 0x00007f9f61f9419f in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#49 0x00007f9f3a39c6dd in gst_element_no_more_pads (element=<optimized out>) at gstelement.c:870
#50 0x00007f9f2c2262e3 in gst_ogg_demux_activate_chain (ogg=ogg@entry=0x7f9e3cab2050, chain=chain@entry=0x7f9e4f3b3050, event=event@entry=0x7f9f000392e0) at gstoggdemux.c:3018
#51 0x00007f9f2c22b2aa in gst_ogg_demux_perform_seek_pull (ogg=ogg@entry=0x7f9e3cab2050, event=event@entry=0x0) at gstoggdemux.c:3672
#52 0x00007f9f2c22fa45 in gst_ogg_demux_loop (pad=<optimized out>) at gstoggdemux.c:4861
#53 0x00007f9f3a3ed021 in gst_task_func (task=0x7f9e404ae950) at gsttask.c:332
#54 0x00007fa0119055e3 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:307
#55 0x00007fa011904c45 in g_thread_proxy (data=0x7f9ee8008c50) at gthread.c:784
#56 0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#57 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f9f1ad7b700 (LWP 23222)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9ee800a3e0, timeout=<optimized out>, context=0x7f9ee800a320) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9ee800a320, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9ee800a320, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0118dd431 in glib_worker_main (data=<optimized out>) at gmain.c:5773
#5  0x00007fa011904c45 in g_thread_proxy (data=0x555ad28a34f0) at gthread.c:784
#6  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#7  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f9f0bfff700 (LWP 18922)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa00f2729b1 in poll (__timeout=-1, __nfds=3, __fds=0x7f9f0404c2c0) at /usr/include/bits/poll2.h:46
#2  0x00007fa00f2729b1 in poll_func (ufds=0x7f9f0404c2c0, nfds=3, timeout=-1, userdata=0x555ad4287b00) at pulse/thread-mainloop.c:69
#3  0x00007fa00f2641e0 in pa_mainloop_poll (m=m@entry=0x555ad444c520) at pulse/mainloop.c:824
#4  0x00007fa00f26482e in pa_mainloop_iterate (m=0x555ad444c520, block=<optimized out>, retval=0x0) at pulse/mainloop.c:926
#5  0x00007fa00f2648e0 in pa_mainloop_run (m=0x555ad444c520, retval=retval@entry=0x0) at pulse/mainloop.c:945
#6  0x00007fa00f2728f9 in thread (userdata=0x555ad2fd5550) at pulse/thread-mainloop.c:100
#7  0x00007fa00d474668 in internal_thread_func (userdata=0x555ad3c223a0) at pulsecore/thread-posix.c:81
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f9f34e86700 (LWP 4192)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9f28004a10, timeout=<optimized out>, context=0x7f9f28000bf0) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9f28000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9f28000bf0, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f28000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f34e85d40, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007fa017ed3326 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x555acff0df40) at thread/qthread_unix.cpp:367
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f9f36d9e700 (LWP 4185)):
#0  0x00007fa0177bc739 in syscall () at /lib64/libc.so.6
#1  0x00007fa017ed2124 in QtLinuxFutex::_q_futex(int*, int, int, unsigned long long, int*, int) (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at thread/qfutex_p.h:105
#2  0x00007fa017ed2124 in QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> >(QBasicAtomicInteger<unsigned int>&, QBasicAtomicInteger<unsigned int>::Type) (expectedValue=<optimized out>, futex=...)
    at thread/qfutex_p.h:107
#3  0x00007fa017ed2124 in futexSemaphoreTryAcquire_loop<false>(QBasicAtomicInteger<unsigned long long>&, unsigned long long, unsigned long long, int) (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...)
    at thread/qsemaphore.cpp:221
---Type <return> to continue, or q <return> to quit---
#4  0x00007fa017ed2124 in futexSemaphoreTryAcquire<false>(QBasicAtomicInteger<unsigned long long>&, int, int) (timeout=-1, n=<optimized out>, u=...) at thread/qsemaphore.cpp:264
#5  0x00007fa017ed2124 in QSemaphore::acquire(int) (this=0x7fa014f9f2c0, n=<optimized out>) at thread/qsemaphore.cpp:328
#6  0x00007fa014ce32c4 in  () at /usr/lib64/libQt5Network.so.5
#7  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x7fa014f9f2a0) at thread/qthread_unix.cpp:367
#8  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f9f39312700 (LWP 4184)):
#0  0x00007fa0170724dc in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fa017b44b4c in __gthread_cond_wait (__mutex=<optimized out>, __cond=<optimized out>)
    at /usr/src/debug/gcc8-8.1.1+r261583-1.9.x86_64/obj-x86_64-suse-linux/x86_64-suse-linux/libstdc++-v3/include/x86_64-suse-linux/bits/gthr-default.h:864
#2  0x00007fa017b44b4c in std::condition_variable::wait(std::unique_lock<std::mutex>&) (this=<optimized out>, __lock=...) at ../../../../../libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00007f9f3d998682 in  () at /usr/lib64/libQt5WebKit.so.5
#4  0x00007f9f3d99879b in  () at /usr/lib64/libQt5WebKit.so.5
#5  0x00007fa017b4a36f in execute_native_thread_routine (__p=0x7f9ff4601330) at ../../../../../libstdc++-v3/src/c++11/thread.cc:80
#6  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#7  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f9f52503700 (LWP 4044)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9f4c006480, timeout=<optimized out>, context=0x7f9f4c000bf0) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9f4c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9f4c000bf0, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f4c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f52502d00, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007fa017ed3326 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007f9f54ea1617 in KCupsConnection::run() () at /usr/lib64/libkcupslib.so
#8  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x555acec27b60) at thread/qthread_unix.cpp:367
#9  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f9f6477a700 (LWP 4031)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9f5c0055d0, timeout=<optimized out>, context=0x7f9f5c000bf0) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9f5c000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9f5c000bf0, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f5c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9f64779d10, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007fa017ed3326 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007fa01be0e232 in QQuickPixmapReader::run() (this=0x555acccf9430) at /usr/src/debug/libqt5-qtdeclarative-5.11.1-1.1.x86_64/src/quick/util/qquickpixmapcache.cpp:934
#8  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x555acccf9430) at thread/qthread_unix.cpp:367
#9  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f9f722af700 (LWP 4009)):
#0  0x00007fa0170724dc in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f9f72f3779b in  () at /usr/lib64/dri/i965_dri.so
#2  0x00007f9f72f374c7 in  () at /usr/lib64/dri/i965_dri.so
#3  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f9ffd51b700 (LWP 4008)):
#0  0x00007fa0170724dc in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fa01dd4676a in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7fa01e02cec0 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fa01dd4678b in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

---Type <return> to continue, or q <return> to quit---
Thread 4 (Thread 0x7f9fffdfa700 (LWP 3939)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f9ff4004a00, timeout=<optimized out>, context=0x7f9ff4000bf0) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9ff4000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9ff4000bf0, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9ff4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9fffdf9d20, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007fa017ed3326 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007fa01b982085 in QQmlThreadPrivate::run() (this=0x555acc152a50) at /usr/src/debug/libqt5-qtdeclarative-5.11.1-1.1.x86_64/src/qml/qml/ftw/qqmlthread.cpp:148
#8  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x555acc152a50) at thread/qthread_unix.cpp:367
#9  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fa005943700 (LWP 3913)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa0118dd2c6 in g_main_context_poll (priority=<optimized out>, n_fds=3, fds=0x7f9ff8004db0, timeout=<optimized out>, context=0x7f9ff8000bf0) at gmain.c:4204
#2  0x00007fa0118dd2c6 in g_main_context_iterate (context=context@entry=0x7f9ff8000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007fa0118dd3ec in g_main_context_iteration (context=0x7f9ff8000bf0, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f9ff8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fa005942d10, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007fa017ed3326 in QThread::exec() (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007fa01a3a3f45 in QDBusConnectionManager::run() (this=0x7fa01a619d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x7fa01a619d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:367
#9  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fa007f3c700 (LWP 3886)):
#0  0x00007fa0177b72c9 in poll () at /lib64/libc.so.6
#1  0x00007fa01ca40377 in poll (__timeout=-1, __nfds=1, __fds=0x7fa007f3bc48) at /usr/include/bits/poll2.h:46
#2  0x00007fa01ca40377 in _xcb_conn_wait (c=0x555acbf8c730, cond=<optimized out>, vector=0x0, count=0x0) at xcb_conn.c:479
#3  0x00007fa01ca41f8a in xcb_wait_for_event (c=0x555acbf8c730) at xcb_in.c:697
#4  0x00007fa00a4d4089 in QXcbEventReader::run() (this=0x555acbf4e1c0) at qxcbconnection.h:409
#5  0x00007fa017edc8ec in QThreadPrivate::start(void*) (arg=0x555acbf4e1c0) at thread/qthread_unix.cpp:367
#6  0x00007fa01706c554 in start_thread () at /lib64/libpthread.so.0
#7  0x00007fa0177c1ccf in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fa01e658880 (LWP 3878)):
#0  0x00007fa007122841 in QXcbGlxIntegration::handleXcbEvent(xcb_generic_event_t*, unsigned int) (this=0x555acc080180, event=0x555ad1cce930, responseType=96) at qxcbglxintegration.cpp:138
#1  0x00007fa00a4d59a1 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (this=this@entry=0x555acbf89f00, event=event@entry=0x555ad1cce930) at qxcbconnection.cpp:1245
#2  0x00007fa00a4d6353 in QXcbConnection::processXcbEvents() (this=0x555acbf89f00) at qxcbconnection.cpp:1787
#3  0x00007fa01809e3f2 in QObject::event(QEvent*) (this=0x555acbf89f00, e=<optimized out>) at kernel/qobject.cpp:1251
#4  0x00007fa0196cbc11 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x555acbf78730, receiver=receiver@entry=0x555acbf89f00, e=e@entry=0x7fa0000ba280) at kernel/qapplication.cpp:3728
#5  0x00007fa0196d2df0 in QApplication::notify(QObject*, QEvent*) (this=0x7fffb9ec5aa0, receiver=0x555acbf89f00, e=0x7fa0000ba280) at kernel/qapplication.cpp:3487
#6  0x00007fa018075d29 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x555acbf89f00, event=0x7fa0000ba280) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:142
#7  0x00007fa018078bdb in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x7fa0000ba280, receiver=<optimized out>) at kernel/qcoreapplication.h:234
#8  0x00007fa018078bdb in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=0, data=0x555acbf53f20) at kernel/qcoreapplication.cpp:1745
#9  0x00007fa018079018 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1599
#10 0x00007fa0180c54a3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x555acc0a2830) at kernel/qeventdispatcher_glib.cpp:276
#11 0x00007fa0118dd0be in g_main_dispatch (context=0x7fa000004ff0) at gmain.c:3177
#12 0x00007fa0118dd0be in g_main_context_dispatch (context=context@entry=0x7fa000004ff0) at gmain.c:3830
#13 0x00007fa0118dd358 in g_main_context_iterate (context=context@entry=0x7fa000004ff0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3903
#14 0x00007fa0118dd3ec in g_main_context_iteration (context=0x7fa000004ff0, may_block=may_block@entry=1) at gmain.c:3964
#15 0x00007fa0180c4b23 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x555acbfe7070, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#16 0x00007fa00a562641 in QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x555acbfe7070, flags=...) at qeventdispatcher_glib.cpp:69
#17 0x00007fa018074b3b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fffb9ec59a0, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#18 0x00007fa01807c8be in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#19 0x0000555acb0aecab in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma5-workspace-5.13.3-1.2.x86_64/shell/main.cpp:212
Comment 1 Fabian Vogt 2018-08-02 18:31:00 UTC 
Created attachment 114272 [details]
Output of another gdb session

Someone had a very similiar issue, but instead of a notification this spammed the logs:

plasmashell[2471]: Warning: "No decoder available for type 'video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001b67640028acd940780227e5c044000003000400000300c83c60c65801000668ebe3cb22c0, width=(int)1920, height=(int)1080, framerate=(fraction)25/1, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true'."

gdb session output attached.
Comment 2 robert marshall 2019-07-04 17:02:15 UTC 
I can replicate this with amarok (and running with the fluxbox WM) by enabling bluetooth headphones listening and then stopping the playback, disconnecting the headphones (in blueman applet) I check that the output bluetooth device has gone, so it all looks good. But if I then try to listen with wired headphones I get the popup loop.