Bug 340694

Summary: KNotify crashes sometimes when vlc is playing and the shell rings the bell
Product: [Unmaintained] phonon-backend-gstreamer Reporter: mgolden
Component: generalAssignee: Daniel Vrátil <dvratil>
Status: RESOLVED WORKSFORME    
Severity: crash CC: bernecky, myriam, romain.perier, sitter, tdfischer
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description mgolden 2014-11-06 19:59:29 UTC 
Application: knotify4 (4.13.3)
KDE Platform Version: 4.13.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-39-generic x86_64
Distribution: Ubuntu 14.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

If I have vlc playing audio and I am in Konsole using bash, when I hit a tab-complete to complete a file name and the bell rings, KNotify will sometimes crash.  This has happened several times.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KNotify (knotify4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbb6569a7c0 (LWP 2741))]

Thread 9 (Thread 0x7fbb51cec700 (LWP 2743)):
#0  qt_gettime () at tools/qelapsedtimer_unix.cpp:142
#1  0x00007fbb62fcbf05 in updateCurrentTime (this=0x7fbb4c003130) at kernel/qeventdispatcher_unix.cpp:354
#2  QTimerInfoList::timerWait (this=0x7fbb4c003130, tm=...) at kernel/qeventdispatcher_unix.cpp:460
#3  0x00007fbb62fca67c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fbb51cebc24) at kernel/qeventdispatcher_glib.cpp:143
#4  0x00007fbb62fca725 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:176
#5  0x00007fbb5fc5d68d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbb5fc5df03 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fbb5fc5e0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fbb62fca7be in QEventDispatcherGlib::processEvents (this=0x7fbb4c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#9  0x00007fbb62f9c0af in QEventLoop::processEvents (this=this@entry=0x7fbb51cebde0, flags=...) at kernel/qeventloop.cpp:149
#10 0x00007fbb62f9c3a5 in QEventLoop::exec (this=this@entry=0x7fbb51cebde0, flags=...) at kernel/qeventloop.cpp:204
#11 0x00007fbb62e98c5f in QThread::exec (this=this@entry=0x20f3700) at thread/qthread.cpp:537
#12 0x00007fbb62f7d823 in QInotifyFileSystemWatcherEngine::run (this=0x20f3700) at io/qfilesystemwatcher_inotify.cpp:265
#13 0x00007fbb62e9b32f in QThreadPrivate::start (arg=0x20f3700) at thread/qthread_unix.cpp:349
#14 0x00007fbb6013d182 in start_thread (arg=0x7fbb51cec700) at pthread_create.c:312
#15 0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fbb39930700 (LWP 15032)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbb5fc9fbf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb50b2070c in gst_task_func (task=0x7fbb2c24ba70) at gsttask.c:301
#3  0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb6013d182 in start_thread (arg=0x7fbb39930700) at pthread_create.c:312
#6  0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fbb23fff700 (LWP 15041)):
#0  0x00007fbb62843c6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fbb609d5031 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fbb609c683c in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fbb609c6ece in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fbb609c6f80 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fbb609d4fe3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fbb5d7d1f08 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
#7  0x00007fbb6013d182 in start_thread (arg=0x7fbb23fff700) at pthread_create.c:312
#8  0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fbb3892e700 (LWP 15042)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbb5fc9fbf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb4b97cfba in gst_data_queue_push (queue=0x7fbb2c011690, item=item@entry=0x7fbb18283190) at gstdataqueue.c:518
#3  0x00007fbb440bf54e in gst_multi_queue_chain (pad=<optimized out>, parent=<optimized out>, buffer=<optimized out>) at gstmultiqueue.c:1459
#4  0x00007fbb50af2d08 in gst_pad_chain_data_unchecked (data=0x7fbb2c02a8e0, type=4112, pad=0x7fbb282b6b10) at gstpad.c:3760
#5  gst_pad_push_data (pad=pad@entry=0x7fbb24286420, type=type@entry=4112, data=<optimized out>) at gstpad.c:3990
#6  0x00007fbb50af99b6 in gst_pad_push (pad=pad@entry=0x7fbb24286420, buffer=<optimized out>) at gstpad.c:4093
#7  0x00007fbb3ad59570 in gst_ogg_demux_chain_peer (pad=pad@entry=0x7fbb24286420, packet=packet@entry=0x7fbb3892d900, push_headers=0) at gstoggdemux.c:693
#8  0x00007fbb3ad5a8ba in gst_ogg_pad_submit_packet (packet=0x7fbb3892d900, pad=0x7fbb24286420) at gstoggdemux.c:1114
#9  gst_ogg_pad_stream_out (pad=pad@entry=0x7fbb24286420, npackets=npackets@entry=0) at gstoggdemux.c:1153
#10 0x00007fbb3ad5dd65 in gst_ogg_pad_submit_page (pad=0x7fbb24286420, page=page@entry=0x7fbb3892dcb0) at gstoggdemux.c:1789
#11 0x00007fbb3ad61189 in gst_ogg_demux_handle_page (ogg=ogg@entry=0x7fbb28288670, page=page@entry=0x7fbb3892dcb0) at gstoggdemux.c:4213
#12 0x00007fbb3ad61a2b in gst_ogg_demux_chain (pad=<optimized out>, parent=parent@entry=0x7fbb28288670, buffer=<optimized out>) at gstoggdemux.c:4281
#13 0x00007fbb3ad62cae in gst_ogg_demux_loop_forward (ogg=0x7fbb28288670) at gstoggdemux.c:4407
#14 gst_ogg_demux_loop (pad=<optimized out>) at gstoggdemux.c:4549
#15 0x00007fbb50b20549 in gst_task_func (task=0x7fbb282be290) at gsttask.c:316
#16 0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fbb6013d182 in start_thread (arg=0x7fbb3892e700) at pthread_create.c:312
#19 0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fbb3ab3e700 (LWP 15043)):
[KCrash Handler]
#6  0x00007fbb5fc79297 in g_slice_alloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fbb50ace02f in gst_caps_new_empty () at gstcaps.c:236
#8  0x00007fbb3bdf1ddd in gst_audio_resample_transform_caps (base=<optimized out>, direction=<optimized out>, caps=0x7fbb4020f0a0, filter=0x0) at gstaudioresample.c:300
#9  0x00007fbb4b96dacd in gst_base_transform_transform_caps (trans=trans@entry=0x2551ad0, direction=GST_PAD_SRC, caps=caps@entry=0x7fbb4020f0a0, filter=filter@entry=0x0) at gstbasetransform.c:523
#10 0x00007fbb4b96f076 in gst_base_transform_query_caps (filter=0x0, pad=0x256b030, trans=0x2551ad0) at gstbasetransform.c:732
#11 gst_base_transform_default_query (trans=0x2551ad0, direction=<optimized out>, query=0x7fbb1c12a2d0) at gstbasetransform.c:1512
#12 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x256b030, query=query@entry=0x7fbb1c12a2d0) at gstpad.c:3511
#13 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x256a770, query=query@entry=0x7fbb1c12a2d0) at gstpad.c:3642
#14 0x00007fbb50b29d54 in gst_pad_peer_query_caps (pad=pad@entry=0x256a770, filter=filter@entry=0x0) at gstutils.c:2810
#15 0x00007fbb4b96f36c in gst_base_transform_query_caps (filter=0x0, pad=0x256a540, trans=0x20acd50) at gstbasetransform.c:715
#16 gst_base_transform_default_query (trans=0x20acd50, direction=GST_PAD_SINK, query=0x7fbb242860a0) at gstbasetransform.c:1512
#17 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x256a540, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#18 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x256ae00, query=0x7fbb242860a0) at gstpad.c:3642
#19 0x00007fbb50b25038 in query_caps_func (pad=pad@entry=0x256ae00, data=data@entry=0x7fbb3ab3ab90) at gstutils.c:2481
#20 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x256abd0, forward=forward@entry=0x7fbb50b25020 <query_caps_func>, user_data=user_data@entry=0x7fbb3ab3ab90) at gstpad.c:2729
#21 0x00007fbb50b2721a in gst_pad_proxy_query_caps (pad=pad@entry=0x256abd0, query=query@entry=0x7fbb242860a0) at gstutils.c:2531
#22 0x00007fbb50af7dfb in gst_pad_query_caps_default (query=0x7fbb242860a0, pad=0x256abd0) at gstpad.c:2893
#23 gst_pad_query_default (pad=0x256abd0, parent=<optimized out>, query=0x7fbb242860a0) at gstpad.c:3004
#24 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x256abd0, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#25 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x25ec040, query=0x7fbb242860a0) at gstpad.c:3642
#26 0x00007fbb50b25038 in query_caps_func (pad=pad@entry=0x25ec040, data=data@entry=0x7fbb3ab3aec0) at gstutils.c:2481
#27 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x25ea090, forward=forward@entry=0x7fbb50b25020 <query_caps_func>, user_data=user_data@entry=0x7fbb3ab3aec0) at gstpad.c:2729
#28 0x00007fbb50b2721a in gst_pad_proxy_query_caps (pad=pad@entry=0x25ea090, query=query@entry=0x7fbb242860a0) at gstutils.c:2531
#29 0x00007fbb50af7dfb in gst_pad_query_caps_default (query=0x7fbb242860a0, pad=0x25ea090) at gstpad.c:2893
#30 gst_pad_query_default (pad=0x25ea090, parent=<optimized out>, query=0x7fbb242860a0) at gstpad.c:3004
#31 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25ea090, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#32 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x25ec6f0, query=0x7fbb242860a0) at gstpad.c:3642
#33 0x00007fbb50b25038 in query_caps_func (pad=pad@entry=0x25ec6f0, data=data@entry=0x7fbb3ab3b1f0) at gstutils.c:2481
#34 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x256b490, forward=forward@entry=0x7fbb50b25020 <query_caps_func>, user_data=user_data@entry=0x7fbb3ab3b1f0) at gstpad.c:2729
#35 0x00007fbb50b2721a in gst_pad_proxy_query_caps (pad=pad@entry=0x256b490, query=query@entry=0x7fbb242860a0) at gstutils.c:2531
#36 0x00007fbb50af7dfb in gst_pad_query_caps_default (query=0x7fbb242860a0, pad=0x256b490) at gstpad.c:2893
#37 gst_pad_query_default (pad=0x256b490, parent=<optimized out>, query=0x7fbb242860a0) at gstpad.c:3004
#38 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x256b490, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#39 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x256bb20, query=0x7fbb242860a0) at gstpad.c:3642
#40 0x00007fbb50b25038 in query_caps_func (pad=pad@entry=0x256bb20, data=data@entry=0x7fbb3ab3b520) at gstutils.c:2481
#41 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x256b8f0, forward=forward@entry=0x7fbb50b25020 <query_caps_func>, user_data=user_data@entry=0x7fbb3ab3b520) at gstpad.c:2729
#42 0x00007fbb50b2721a in gst_pad_proxy_query_caps (pad=pad@entry=0x256b8f0, query=query@entry=0x7fbb242860a0) at gstutils.c:2531
#43 0x00007fbb50af7dfb in gst_pad_query_caps_default (query=0x7fbb242860a0, pad=0x256b8f0) at gstpad.c:2893
#44 gst_pad_query_default (pad=0x256b8f0, parent=<optimized out>, query=0x7fbb242860a0) at gstpad.c:3004
#45 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x256b8f0, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#46 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x25ec280, query=0x7fbb242860a0) at gstpad.c:3642
#47 0x00007fbb50b25038 in query_caps_func (pad=pad@entry=0x25ec280, data=data@entry=0x7fbb3ab3b850) at gstutils.c:2481
#48 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x25ea2f0, forward=forward@entry=0x7fbb50b25020 <query_caps_func>, user_data=user_data@entry=0x7fbb3ab3b850) at gstpad.c:2729
#49 0x00007fbb50b2721a in gst_pad_proxy_query_caps (pad=pad@entry=0x25ea2f0, query=query@entry=0x7fbb242860a0) at gstutils.c:2531
#50 0x00007fbb50af7dfb in gst_pad_query_caps_default (query=0x7fbb242860a0, pad=0x25ea2f0) at gstpad.c:2893
#51 gst_pad_query_default (pad=0x25ea2f0, parent=<optimized out>, query=0x7fbb242860a0) at gstpad.c:3004
#52 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25ea2f0, query=query@entry=0x7fbb242860a0) at gstpad.c:3511
#53 0x00007fbb50b27914 in gst_pad_query_caps (pad=pad@entry=0x25ea2f0, filter=filter@entry=0x0) at gstutils.c:2764
#54 0x00007fbb3b9cf40c in gst_play_sink_convert_bin_getcaps (filter=0x0, pad=0x25eb850) at gstplaysinkconvertbin.c:376
#55 gst_play_sink_convert_bin_query (pad=0x25eb850, parent=<optimized out>, query=0x7fbb40268f70) at gstplaysinkconvertbin.c:442
#56 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25eb850, query=query@entry=0x7fbb40268f70) at gstpad.c:3511
#57 0x00007fbb50b27914 in gst_pad_query_caps (pad=pad@entry=0x25eb850, filter=filter@entry=0x0) at gstutils.c:2764
#58 0x00007fbb3b9cf1f4 in gst_play_sink_convert_bin_acceptcaps (caps=0x7fbb24286190, pad=0x25eb850) at gstplaysinkconvertbin.c:413
#59 gst_play_sink_convert_bin_query (pad=0x25eb850, parent=<optimized out>, query=0x7fbb24286000) at gstplaysinkconvertbin.c:432
#60 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25eb850, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#61 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb3002a7a0, query=0x7fbb24286000) at gstpad.c:3642
#62 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb3002a7a0, data=data@entry=0x7fbb3ab3be60) at gstutils.c:2425
#63 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x7fbb3002a570, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3be60) at gstpad.c:2729
#64 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x7fbb3002a570, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#65 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x7fbb3002a570) at gstpad.c:2855
#66 gst_pad_query_default (pad=0x7fbb3002a570, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#67 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x7fbb3002a570, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#68 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb300264f0, query=0x7fbb24286000) at gstpad.c:3642
#69 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb300264f0, data=data@entry=0x7fbb3ab3c150) at gstutils.c:2425
#70 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x25ebd10, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3c150) at gstpad.c:2729
#71 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x25ebd10, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#72 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x25ebd10) at gstpad.c:2855
#73 gst_pad_query_default (pad=0x25ebd10, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#74 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25ebd10, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#75 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb282c82a0, query=0x7fbb24286000) at gstpad.c:3642
#76 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb282c82a0, data=data@entry=0x7fbb3ab3c440) at gstutils.c:2425
#77 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x7fbb282c8070, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3c440) at gstpad.c:2729
#78 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x7fbb282c8070, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#79 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x7fbb282c8070) at gstpad.c:2855
#80 gst_pad_query_default (pad=0x7fbb282c8070, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#81 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x7fbb282c8070, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#82 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb30026720, query=0x7fbb24286000) at gstpad.c:3642
#83 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb30026720, data=data@entry=0x7fbb3ab3c730) at gstutils.c:2425
#84 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x7fbb3002a340, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3c730) at gstpad.c:2729
#85 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x7fbb3002a340, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#86 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x7fbb3002a340) at gstpad.c:2855
#87 gst_pad_query_default (pad=0x7fbb3002a340, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#88 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x7fbb3002a340, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#89 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x25edd80, query=0x7fbb24286000) at gstpad.c:3642
#90 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x25edd80, data=data@entry=0x7fbb3ab3ca20) at gstutils.c:2425
#91 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x25eb5f0, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3ca20) at gstpad.c:2729
#92 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x25eb5f0, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#93 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x25eb5f0) at gstpad.c:2855
#94 gst_pad_query_default (pad=0x25eb5f0, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#95 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25eb5f0, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#96 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb4029bd10, query=0x7fbb24286000) at gstpad.c:3642
#97 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb4029bd10, data=data@entry=0x7fbb3ab3cd10) at gstutils.c:2425
#98 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x7fbb30049050, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3cd10) at gstpad.c:2729
#99 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x7fbb30049050, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#100 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x7fbb30049050) at gstpad.c:2855
#101 gst_pad_query_default (pad=0x7fbb30049050, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#102 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x7fbb30049050, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#103 0x00007fbb50af8ad0 in gst_pad_peer_query (pad=pad@entry=0x7fbb3003e800, query=0x7fbb24286000) at gstpad.c:3642
#104 0x00007fbb50b25000 in query_accept_caps_func (pad=pad@entry=0x7fbb3003e800, data=data@entry=0x7fbb3ab3d000) at gstutils.c:2425
#105 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x25edb40, forward=forward@entry=0x7fbb50b24ff0 <query_accept_caps_func>, user_data=user_data@entry=0x7fbb3ab3d000) at gstpad.c:2729
#106 0x00007fbb50b27061 in gst_pad_proxy_query_accept_caps (pad=pad@entry=0x25edb40, query=query@entry=0x7fbb24286000) at gstutils.c:2464
#107 0x00007fbb50af7e1b in gst_pad_query_accept_caps_default (query=0x7fbb24286000, pad=0x25edb40) at gstpad.c:2855
#108 gst_pad_query_default (pad=0x25edb40, parent=<optimized out>, query=0x7fbb24286000) at gstpad.c:3000
#109 0x00007fbb50af84ea in gst_pad_query (pad=pad@entry=0x25edb40, query=query@entry=0x7fbb24286000) at gstpad.c:3511
#110 0x00007fbb50b29f36 in gst_pad_query_accept_caps (pad=pad@entry=0x25edb40, caps=<optimized out>) at gstutils.c:2847
#111 0x00007fbb50af17fa in pre_eventfunc_check (event=0x7fbb1c090060, pad=0x25edb40) at gstpad.c:4914
#112 gst_pad_send_event_unchecked (pad=pad@entry=0x25edb40, event=event@entry=0x7fbb1c090060, type=type@entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at gstpad.c:5029
#113 0x00007fbb50af1ec4 in gst_pad_push_event_unchecked (pad=pad@entry=0x7fbb34022180, event=0x7fbb1c090060, type=type@entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at gstpad.c:4731
#114 0x00007fbb50af2348 in push_sticky (pad=0x7fbb34022180, ev=0x7fbb3ab3d380, user_data=0x7fbb3ab3d3e0) at gstpad.c:3370
#115 0x00007fbb50af0632 in events_foreach (pad=pad@entry=0x7fbb34022180, func=func@entry=0x7fbb50af21f0 <push_sticky>, user_data=user_data@entry=0x7fbb3ab3d3e0) at gstpad.c:530
#116 0x00007fbb50afa618 in check_sticky (event=0x7fbb1c090060, pad=0x7fbb34022180) at gstpad.c:3426
#117 gst_pad_push_event (pad=pad@entry=0x7fbb34022180, event=0x7fbb1c090060) at gstpad.c:4849
#118 0x00007fbb50afa79f in event_forward_func (pad=pad@entry=0x7fbb34022180, data=data@entry=0x7fbb3ab3d530) at gstpad.c:2775
#119 0x00007fbb50af7857 in gst_pad_forward (pad=pad@entry=0x7fbb30026df0, forward=forward@entry=0x7fbb50afa6d0 <event_forward_func>, user_data=user_data@entry=0x7fbb3ab3d530) at gstpad.c:2729
#120 0x00007fbb50af798e in gst_pad_event_default (pad=pad@entry=0x7fbb30026df0, parent=parent@entry=0x7fbb34022180, event=event@entry=0x7fbb1c090060) at gstpad.c:2826
#121 0x00007fbb50af16db in gst_pad_send_event_unchecked (pad=pad@entry=0x7fbb30026df0, event=event@entry=0x7fbb1c090060, type=type@entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at gstpad.c:5036
#122 0x00007fbb50af1ec4 in gst_pad_push_event_unchecked (pad=pad@entry=0x7fbb4029bae0, event=0x7fbb1c090060, type=type@entry=GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) at gstpad.c:4731
#123 0x00007fbb50af2348 in push_sticky (pad=0x7fbb4029bae0, ev=0x7fbb3ab3d730, user_data=0x7fbb3ab3d790) at gstpad.c:3370
#124 0x00007fbb50af0632 in events_foreach (pad=pad@entry=0x7fbb4029bae0, func=func@entry=0x7fbb50af21f0 <push_sticky>, user_data=user_data@entry=0x7fbb3ab3d790) at gstpad.c:530
#125 0x00007fbb50afa618 in check_sticky (event=0x7fbb1c090060, pad=0x7fbb4029bae0) at gstpad.c:3426
#126 gst_pad_push_event (pad=pad@entry=0x7fbb4029bae0, event=0x7fbb1c090060) at gstpad.c:4849
#127 0x00007fbb4b48f0c6 in gst_pad_set_caps (caps=0x7fbb24286190, pad=0x7fbb4029bae0) at /usr/include/gstreamer-1.0/gst/gstcompat.h:55
#128 gst_audio_decoder_negotiate_default (dec=0x7fbb242912a0) at gstaudiodecoder.c:666
#129 0x00007fbb4b491fb4 in gst_audio_decoder_negotiate_unlocked (dec=0x7fbb242912a0) at gstaudiodecoder.c:725
#130 gst_audio_decoder_allocate_output_buffer (dec=dec@entry=0x7fbb242912a0, size=size@entry=1024) at gstaudiodecoder.c:3249
#131 0x00007fbb39935ff0 in vorbis_handle_data_packet (timestamp=<optimized out>, duration=<optimized out>, packet=0x7fbb3ab3d910, vd=0x7fbb242912a0) at gstvorbisdec.c:479
#132 vorbis_dec_handle_frame (dec=0x7fbb242912a0, buffer=0x7fbb3401ec10) at gstvorbisdec.c:596
#133 0x00007fbb4b48cc73 in gst_audio_decoder_push_buffers (dec=dec@entry=0x7fbb242912a0, force=force@entry=0) at gstaudiodecoder.c:1406
#134 0x00007fbb4b48d04b in gst_audio_decoder_chain_forward (dec=dec@entry=0x7fbb242912a0, buffer=0x0, buffer@entry=0x7fbb3401ec10) at gstaudiodecoder.c:1509
#135 0x00007fbb4b48e036 in gst_audio_decoder_chain (pad=<optimized out>, parent=0x7fbb242912a0, buffer=0x7fbb3401ec10) at gstaudiodecoder.c:1786
#136 0x00007fbb50af2d08 in gst_pad_chain_data_unchecked (data=0x7fbb3401ec10, type=4112, pad=0x7fbb4029a960) at gstpad.c:3760
#137 gst_pad_push_data (pad=0x7fbb282b68e0, type=type@entry=4112, data=<optimized out>, data@entry=0x7fbb3401ec10) at gstpad.c:3990
#138 0x00007fbb50af99b6 in gst_pad_push (pad=<optimized out>, buffer=buffer@entry=0x7fbb3401ec10) at gstpad.c:4093
#139 0x00007fbb440c0a23 in gst_single_queue_push_one (object=0x7fbb3401ec10, sq=0x7fbb24270880, mq=0x7fbb24262320) at gstmultiqueue.c:1089
#140 gst_multi_queue_loop (pad=<optimized out>) at gstmultiqueue.c:1338
#141 0x00007fbb50b20549 in gst_task_func (task=0x7fbb2c24b170) at gsttask.c:316
#142 0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#143 0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#144 0x00007fbb6013d182 in start_thread (arg=0x7fbb3ab3e700) at pthread_create.c:312
#145 0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fbb3b996700 (LWP 15044)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbb5fc9fbf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb440c378d in gst_queue_loop (pad=<optimized out>) at gstqueue.c:1232
#3  0x00007fbb50b20549 in gst_task_func (task=0x7fbb282bedd0) at gsttask.c:316
#4  0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbb6013d182 in start_thread (arg=0x7fbb3b996700) at pthread_create.c:312
#7  0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fbb459b7700 (LWP 15045)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbb5fc9fbf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb440c378d in gst_queue_loop (pad=<optimized out>) at gstqueue.c:1232
#3  0x00007fbb50b20549 in gst_task_func (task=0x7fbb282beef0) at gsttask.c:316
#4  0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbb6013d182 in start_thread (arg=0x7fbb459b7700) at pthread_create.c:312
#7  0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fbb3a33d700 (LWP 15046)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fbb5fc9fbf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb440c378d in gst_queue_loop (pad=<optimized out>) at gstqueue.c:1232
#3  0x00007fbb50b20549 in gst_task_func (task=0x7fbb2829d050) at gsttask.c:316
#4  0x00007fbb5fc8388c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb5fc82f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbb6013d182 in start_thread (arg=0x7fbb3a33d700) at pthread_create.c:312
#7  0x00007fbb62850fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fbb6569a7c0 (LWP 2741)):
#0  0x00007fbb6284236d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fbb5fc9ec10 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbb5fc5db14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbb5fc5df7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbb5fc5e0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbb62fca7a1 in QEventDispatcherGlib::processEvents (this=0x1f2d630, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#6  0x00007fbb63cacbb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#7  0x00007fbb62f9c0af in QEventLoop::processEvents (this=this@entry=0x7fff4da77ae0, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fbb62f9c3a5 in QEventLoop::exec (this=this@entry=0x7fff4da77ae0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fbb62fa1b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#10 0x00007fbb63c0937c in QApplication::exec () at kernel/qapplication.cpp:3828
#11 0x0000000000409a09 in main (argc=1, argv=0x7fff4da77d38) at ../../knotify/main.cpp:74

Report to https://bugs.kde.org/

Reproducible: Sometimes
Comment 1 Robert Bernecky 2016-02-03 21:15:04 UTC 
I get the same failure as of 2016-02-03, but I do not think that vlc is required.
I get the failure, sporadically, when hitting a tab-complete in konsole.

Latest version of 14.04LTS is running here:

pplication: knotify4 (4.13.3)
KDE Platform Version: 4.13.3 (Compiled from sources)
Qt Version: 4.8.6
Operating System: Linux 3.13.0-76-generic x86_64
Distribution: Ubuntu 14.04.3 LTS

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

The crash can be reproduced sometimes.

-- Backtrace:
A useful backtrace could not be generated

Report to https://bugs.kde.org/

Attempts to install debug symbols within the crash dialog failed.
Comment 2 Andrew Crouthamel 2018-11-01 13:51:48 UTC 
Dear Bug Submitter,

This bug has been stagnant for a long time. Could you help us out and re-test if the bug is valid in the latest version? I am setting the status to NEEDSINFO pending your response, please change the Status back to REPORTED when you respond.

Thank you for helping us make KDE software even better for everyone!
Comment 3 Bug Janitor Service 2018-11-16 11:33:46 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 4 Bug Janitor Service 2018-12-01 03:48:07 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!