Bug 319805

Summary: Amarok crashed on attemps to play a file
Product: [Applications] amarok Reporter: loic.grobol
Component: generalAssignee: Amarok Bugs <amarok-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash    
Priority: NOR    
Version First Reported In: 2.7.0   
Target Milestone: 2.8   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description loic.grobol 2013-05-13 21:54:25 UTC 
Application: amarok (2.7.0)
KDE Platform Version: 4.10.2
Qt Version: 4.8.4
Operating System: Linux 3.8.0-20-generic x86_64
Distribution: Ubuntu 13.04

-- Information about the crash:
- What I was doing when the application crashed: Trying to play a file after updating the library and activating the nepomuk plugin. Happens every time.

The crash can be reproduced every time.

-- Backtrace:
Application: Amarok (amarok), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f54a345d7c0 (LWP 2154))]

Thread 13 (Thread 0x7f5481496700 (LWP 2270)):
#0  0x00007f549a841359 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f549a8415b9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f549a801abb in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f549a80214c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f549a802304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f54a06f2036 in QEventDispatcherGlib::processEvents (this=0x7f547c000900, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f54a06c238f in QEventLoop::processEvents (this=this@entry=0x7f5481495d90, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f54a06c2618 in QEventLoop::exec (this=this@entry=0x7f5481495d90, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f54a05c4410 in QThread::exec (this=this@entry=0x1e31430) at thread/qthread.cpp:542
#9  0x00007f54a06a3edf in QInotifyFileSystemWatcherEngine::run (this=0x1e31430) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007f54a05c6bec in QThreadPrivate::start (arg=0x1e31430) at thread/qthread_unix.cpp:338
#11 0x00007f549c2f6f8e in start_thread (arg=0x7f5481496700) at pthread_create.c:311
#12 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 12 (Thread 0x7f5479f83700 (LWP 2271)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54a05c714b in wait (time=18446744073709551615, this=0x19e0db0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x206f3b8, mutex=0x19db120, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f549d85f041 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206f390, th=0x1a5bd30) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f549d86194b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x1a5bd30) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f549d86063f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7f5479f82dc0, parent=0x206f390, th=th@entry=0x1a5bd30) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f549d8606cb in ThreadWeaver::Thread::run (this=0x1a5bd30) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x1a5bd30) at thread/qthread_unix.cpp:338
#8  0x00007f549c2f6f8e in start_thread (arg=0x7f5479f83700) at pthread_create.c:311
#9  0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 11 (Thread 0x7f5479782700 (LWP 2272)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54a05c714b in wait (time=18446744073709551615, this=0x19e0db0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x206f3b8, mutex=0x19db120, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f549d85f041 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206f390, th=0x2084960) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f549d86194b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2084960) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2084960) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f549d86063f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7f5479781dc0, parent=0x206f390, th=th@entry=0x2084960) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f549d8606cb in ThreadWeaver::Thread::run (this=0x2084960) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x2084960) at thread/qthread_unix.cpp:338
#9  0x00007f549c2f6f8e in start_thread (arg=0x7f5479782700) at pthread_create.c:311
#10 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 10 (Thread 0x7f5478f81700 (LWP 2273)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54a05c714b in wait (time=18446744073709551615, this=0x19e0db0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x206f3b8, mutex=0x19db120, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f549d85f041 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206f390, th=0x2091360) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f549d86194b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2091360) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2091360) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2091360) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f549d86063f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7f5478f80dc0, parent=0x206f390, th=th@entry=0x2091360) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007f549d8606cb in ThreadWeaver::Thread::run (this=0x2091360) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x2091360) at thread/qthread_unix.cpp:338
#10 0x00007f549c2f6f8e in start_thread (arg=0x7f5478f81700) at pthread_create.c:311
#11 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 9 (Thread 0x7f5473fff700 (LWP 2274)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54a05c714b in wait (time=18446744073709551615, this=0x19e0db0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x206f3b8, mutex=0x19db120, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f549d85f041 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206f390, th=0x2081af0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f549d86194b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2081af0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2081af0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2081af0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2081af0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#8  0x00007f549d861964 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1a57890, th=0x2081af0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#9  0x00007f549d86063f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7f5473ffedc0, parent=0x206f390, th=th@entry=0x2081af0) at ../../../threadweaver/Weaver/Thread.cpp:87
#10 0x00007f549d8606cb in ThreadWeaver::Thread::run (this=0x2081af0) at ../../../threadweaver/Weaver/Thread.cpp:142
#11 0x00007f54a05c6bec in QThreadPrivate::start (arg=0x2081af0) at thread/qthread_unix.cpp:338
#12 0x00007f549c2f6f8e in start_thread (arg=0x7f5473fff700) at pthread_create.c:311
#13 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 8 (Thread 0x7f54731bd700 (LWP 2278)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54977d6585 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f54977d65d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f549c2f6f8e in start_thread (arg=0x7f54731bd700) at pthread_create.c:311
#4  0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 7 (Thread 0x7f5471ea7700 (LWP 2281)):
#0  0x00007f549a8415b0 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f549a801abb in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f549a80214c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f549a802304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f54a06f2036 in QEventDispatcherGlib::processEvents (this=0x7f54140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f54a06c238f in QEventLoop::processEvents (this=this@entry=0x7f5471ea6dc0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f54a06c2618 in QEventLoop::exec (this=this@entry=0x7f5471ea6dc0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f54a05c4410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#8  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x23bf3b0) at thread/qthread_unix.cpp:338
#9  0x00007f549c2f6f8e in start_thread (arg=0x7f5471ea7700) at pthread_create.c:311
#10 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7f5470bd4700 (LWP 2368)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f549c8cfe77 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f549c8cfea9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f549c2f6f8e in start_thread (arg=0x7f5470bd4700) at pthread_create.c:311
#4  0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f541b597700 (LWP 3237)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f54a05c714b in wait (time=18446744073709551615, this=0x2f92f80) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2f92ce8, mutex=mutex@entry=0x2f92ce0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f54a159d636 in QFileInfoGatherer::run (this=0x2f92cd0) at dialogs/qfileinfogatherer.cpp:214
#4  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x2f92cd0) at thread/qthread_unix.cpp:338
#5  0x00007f549c2f6f8e in start_thread (arg=0x7f541b597700) at pthread_create.c:311
#6  0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f541ad96700 (LWP 3238)):
#0  0x00007f549fd573cb in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f549a8021dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f549a802304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f54a06f2036 in QEventDispatcherGlib::processEvents (this=0x7f54000008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f54a06c238f in QEventLoop::processEvents (this=this@entry=0x7f541ad95d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f54a06c2618 in QEventLoop::exec (this=this@entry=0x7f541ad95d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f54a05c4410 in QThread::exec (this=this@entry=0x2f927a0) at thread/qthread.cpp:542
#7  0x00007f54a06a3edf in QInotifyFileSystemWatcherEngine::run (this=0x2f927a0) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f54a05c6bec in QThreadPrivate::start (arg=0x2f927a0) at thread/qthread_unix.cpp:338
#9  0x00007f549c2f6f8e in start_thread (arg=0x7f541ad96700) at pthread_create.c:311
#10 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f5470f31700 (LWP 6746)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5488351358 in input_DecoderWaitBuffering (p_dec=<optimized out>) at input/decoder.c:599
#2  0x00007f5488353152 in EsOutDecodersStopBuffering (b_forced=b_forced@entry=false, out=0x3db7860) at input/es_out.c:649
#3  0x00007f548835970b in EsOutControlLocked (args=<optimized out>, i_query=<optimized out>, out=0x3db7860) at input/es_out.c:2301
#4  EsOutControl (out=0x3db7860, i_query=<optimized out>, args=<optimized out>) at input/es_out.c:2682
#5  0x00007f5488359c8c in es_out_vaControl (args=0x7f5470f30a88, i_query=<optimized out>, out=<optimized out>) at ../include/vlc_es_out.h:126
#6  es_out_Control (out=<optimized out>, i_query=<optimized out>) at ../include/vlc_es_out.h:135
#7  0x00007f548835bb8e in ControlLocked (args=<optimized out>, i_query=<optimized out>, p_out=<optimized out>) at input/es_out_timeshift.c:620
#8  Control (p_out=<optimized out>, i_query=<optimized out>, args=<optimized out>) at input/es_out_timeshift.c:718
#9  0x00007f540df025c1 in es_out_vaControl (args=0x7f5470f30c08, i_query=6, out=<optimized out>) at ../../include/vlc_es_out.h:126
#10 es_out_Control (out=<optimized out>, i_query=6, i_query=6) at ../../include/vlc_es_out.h:135
#11 0x00007f540df0357e in Demux (p_demux=0x7f5404004ce8) at mpeg/es.c:294
#12 0x00007f5488362f9f in demux_Demux (p_demux=0x7f5404004ce8) at input/demux.h:44
#13 MainLoopDemux (i_start_mdate=4634074350, pb_demux_polled=<synthetic pointer>, pb_changed=<synthetic pointer>, p_input=0x2c2ad88) at input/input.c:561
#14 MainLoop (p_input=p_input@entry=0x2c2ad88, b_interactive=b_interactive@entry=true) at input/input.c:737
#15 0x00007f54883637c5 in Run (obj=0x2c2ad88) at input/input.c:523
#16 0x00007f549c2f6f8e in start_thread (arg=0x7f5470f31700) at pthread_create.c:311
#17 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f541ba7f700 (LWP 6747)):
[KCrash Handler]
#6  __strcpy_chk () at ../sysdeps/x86_64/strcpy_chk.S:70
#7  0x00007f5488bd25f0 in strcpy (__src=0x0, __dest=0x7f53f8001030 "pcm.(null)") at /usr/include/x86_64-linux-gnu/bits/string3.h:104
#8  try_config (list=list@entry=0x7f541ba7e770, base=0x7f54851267f1 "pcm", name=0x0) at namehint.c:241
#9  0x00007f5488bd351d in add_software_devices (list=0x7f541ba7e770) at namehint.c:512
#10 snd_device_name_hint (card=card@entry=-1, iface=<optimized out>, iface@entry=0x7f54851267f1 "pcm", hints=hints@entry=0x7f541ba7e858) at namehint.c:587
#11 0x00007f5485125c1d in EnumDevices (obj=obj@entry=0x7f53f8000958, varname=varname@entry=0x0, idp=idp@entry=0x7f541ba7e8e0, namep=namep@entry=0x7f541ba7e8e8) at alsa.c:709
#12 0x00007f5485125eb7 in Open (obj=0x7f53f8000958) at alsa.c:778
#13 0x00007f5488394523 in module_load (obj=obj@entry=0x7f53f8000958, m=m@entry=0x1d382f0, init=init@entry=0x7f5488394470 <generic_start>, args=args@entry=0x7f541ba7e9c8) at modules/modules.c:185
#14 0x00007f5488394b4e in vlc_module_load (obj=obj@entry=0x7f53f8000958, capability=capability@entry=0x7f54883cde5f "audio output", name=0x7f53f8000e25 "none", name@entry=0x7f54883cf930 "$aout", strict=strict@entry=false, probe=probe@entry=0x7f5488394470 <generic_start>) at modules/modules.c:277
#15 0x00007f5488395044 in module_need (obj=obj@entry=0x7f53f8000958, cap=cap@entry=0x7f54883cde5f "audio output", name=name@entry=0x7f54883cf930 "$aout", strict=strict@entry=false) at modules/modules.c:366
#16 0x00007f5488385317 in aout_New (parent=0x1bdbea8) at audio_output/output.c:201
#17 0x00007f5488365923 in input_resource_GetAout (p_resource=0x1b418e0) at input/resource.c:344
#18 0x00007f548835013d in aout_new_buffer (p_dec=0x7f5404014508, i_samples=1152) at input/decoder.c:2233
#19 0x00007f53ff3e4305 in GetAoutBuffer (p_dec=0x7f5404014508) at mpeg_audio.c:531
#20 GetOutBuffer (pp_out_buffer=<synthetic pointer>, p_dec=0x7f5404014508) at mpeg_audio.c:515
#21 DecodeBlock (p_dec=0x7f5404014508, pp_block=0x7f541ba7ece8) at mpeg_audio.c:437
#22 0x00007f548834e8be in DecoderDecodeAudio (p_dec=p_dec@entry=0x7f5404014508, p_block=0x0, p_block@entry=0x7f5404014230) at input/decoder.c:1262
#23 0x00007f548834fda0 in DecoderProcessAudio (b_flush=false, p_block=0x7f5404014230, p_dec=0x7f5404014508) at input/decoder.c:1893
#24 DecoderProcess (p_dec=p_dec@entry=0x7f5404014508, p_block=p_block@entry=0x7f5404014230) at input/decoder.c:2014
#25 0x00007f548834ff54 in DecoderThread (p_data=0x7f5404014508) at input/decoder.c:939
#26 0x00007f549c2f6f8e in start_thread (arg=0x7f541ba7f700) at pthread_create.c:311
#27 0x00007f549fd63e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f54a345d7c0 (LWP 2154)):
#0  0x00007f549c2f8218 in pthread_join (threadid=140000648959744, thread_return=thread_return@entry=0x0) at pthread_join.c:92
#1  0x00007f54883ad595 in vlc_join (handle=<optimized out>, result=result@entry=0x0) at posix/thread.c:749
#2  0x00007f548835e82e in input_Join (p_input=p_input@entry=0x2c2ad88) at input/input.c:255
#3  0x00007f548835e849 in input_Close (p_input=0x2c2ad88) at input/input.c:270
#4  0x00007f548810daaf in release_input_thread (p_mi=p_mi@entry=0x1bdbea8, b_input_abort=b_input_abort@entry=true) at media_player.c:124
#5  0x00007f548810e77e in libvlc_media_player_destroy (p_mi=0x1bdbea8) at media_player.c:552
#6  libvlc_media_player_release (p_mi=0x1bdbea8) at media_player.c:581
#7  0x00007f548862791b in ?? () from /usr/lib/qt4/plugins/phonon_backend/phonon_vlc.so
#8  0x00007f5488627939 in ?? () from /usr/lib/qt4/plugins/phonon_backend/phonon_vlc.so
#9  0x00007f54a06d6232 in QObjectPrivate::deleteChildren (this=this@entry=0x1a7b870) at kernel/qobject.cpp:1907
#10 0x00007f54a06dcf66 in QObject::~QObject (this=0x1bde320, __in_chrg=<optimized out>) at kernel/qobject.cpp:926
#11 0x00007f54886224a9 in ?? () from /usr/lib/qt4/plugins/phonon_backend/phonon_vlc.so
#12 0x00007f549d118db4 in Phonon::MediaNodePrivate::deleteBackendObject() () from /usr/lib/x86_64-linux-gnu/libphonon.so.4
#13 0x00007f549d1062fe in ?? () from /usr/lib/x86_64-linux-gnu/libphonon.so.4
#14 0x00007f549d1065c9 in ?? () from /usr/lib/x86_64-linux-gnu/libphonon.so.4
#15 0x00007f549fca6121 in __run_exit_handlers (status=1, listp=0x7f54a002b6a8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:77
#16 0x00007f549fca61a5 in __GI_exit (status=<optimized out>) at exit.c:99
#17 0x00007f54a1116348 in qt_xio_errhandler () at kernel/qapplication_x11.cpp:782
#18 0x00007f54a2e84888 in KApplication::xioErrhandler (this=0x7fff8268ffb0, dpy=0x1845ed0) at ../../kdeui/kernel/kapplication.cpp:419
#19 0x00007f54a1bd36de in _XIOError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#20 0x00007f54a1bd116d in _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#21 0x00007f54a1bb26ea in XFlush () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#22 0x00007f54a10f580e in QWidget::setCursor (this=0x20f7640, cursor=...) at kernel/qwidget.cpp:5122
#23 0x00007f54a2584301 in MainToolbar::trackChanged (this=0x20f1680, track=...) at ../../src/toolbar/MainToolbar.cpp:605
#24 0x00007f54a2584ac5 in MainToolbar::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./MainToolbar.moc:76
#25 0x00007f54a06d80ef in QMetaObject::activate (sender=sender@entry=0x1a92ee0, m=m@entry=0x7f54a298d960 <EngineController::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7fff8268cf60) at kernel/qobject.cpp:3539
#26 0x00007f54a206f915 in EngineController::trackChanged (this=this@entry=0x1a92ee0, _t1=...) at moc_EngineController.cpp:289
#27 0x00007f54a2477dc7 in EngineController::slotNewTrackPlaying (this=0x1a92ee0, source=...) at ../../src/EngineController.cpp:1102
#28 0x00007f54a20715de in EngineController::qt_static_metacall (_o=0x1a92ee0, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at moc_EngineController.cpp:199
#29 0x00007f54a06d80ef in QMetaObject::activate (sender=0x1a937b0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff8268d260) at kernel/qobject.cpp:3539
#30 0x00007f549d1171f5 in Phonon::MediaObject::currentSourceChanged(Phonon::MediaSource const&) () from /usr/lib/x86_64-linux-gnu/libphonon.so.4
#31 0x00007f549d11748f in ?? () from /usr/lib/x86_64-linux-gnu/libphonon.so.4
#32 0x00007f54a06dd5be in QObject::event (this=0x1a937b0, e=<optimized out>) at kernel/qobject.cpp:1194
#33 0x00007f54a10ac8ec in QApplicationPrivate::notify_helper (this=this@entry=0x18329c0, receiver=receiver@entry=0x1a937b0, e=e@entry=0x2d0bf10) at kernel/qapplication.cpp:4567
#34 0x00007f54a10af25b in QApplication::notify (this=this@entry=0x7fff8268ffb0, receiver=receiver@entry=0x1a937b0, e=e@entry=0x2d0bf10) at kernel/qapplication.cpp:4428
#35 0x00007f54a2e88af6 in KApplication::notify (this=0x7fff8268ffb0, receiver=0x1a937b0, event=0x2d0bf10) at ../../kdeui/kernel/kapplication.cpp:311
#36 0x00007f54a06c363e in QCoreApplication::notifyInternal (this=0x7fff8268ffb0, receiver=receiver@entry=0x1a937b0, event=event@entry=0x2d0bf10) at kernel/qcoreapplication.cpp:946
#37 0x00007f54a06c7171 in sendEvent (event=0x2d0bf10, receiver=0x1a937b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#38 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x16b91f0) at kernel/qcoreapplication.cpp:1570
#39 0x00007f54a06c74a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#40 0x00007f54a06f1e83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#41 postEventSourceDispatch (s=0x1833180) at kernel/qeventdispatcher_glib.cpp:279
#42 0x00007f549a801f05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007f549a802248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007f549a802304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f54a06f2016 in QEventDispatcherGlib::processEvents (this=0x16baad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#46 0x00007f54a11521ae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#47 0x00007f54a06c238f in QEventLoop::processEvents (this=this@entry=0x7fff8268dbd0, flags=...) at kernel/qeventloop.cpp:149
#48 0x00007f54a06c2618 in QEventLoop::exec (this=this@entry=0x7fff8268dbd0, flags=...) at kernel/qeventloop.cpp:204
#49 0x00007f54a06c7cf6 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#50 0x00007f54a10aaffc in QApplication::exec () at kernel/qapplication.cpp:3828
#51 0x00000000004090ca in main (argc=1, argv=0x7fff82690118) at ../../src/main.cpp:329

Possible duplicates by query: bug 316471, bug 313232, bug 312565, bug 308766, bug 292817.

Reported using DrKonqi
Comment 1 Myriam Schweingruber 2013-05-13 23:33:16 UTC 
Please make sure you use the latest phonon-backend-vlc 0.6.3 version. Also there seem to be a problem in Alsa, please check your installation and make sure you have all packages installed correctly.
Comment 2 loic.grobol 2013-05-14 00:48:35 UTC 
Indeed, phonon-backend-vlc is 0.6.2, I believe it is the version from the ubuntu repos, do you want me to try building and installing v 0.6.3  from the sources? Regarding alsa, I don't remember having any issue with it, what do you suggest I should do to check if everything is installed correctly?

Sorry if I am a bit slow with this, I am still not familiar with the arcanes of audio handling.
Comment 3 Myriam Schweingruber 2013-05-14 08:06:44 UTC 
NVM, that was a typo from me, the latest vlc backend version is 0.6.2.

It is this part of the backtrace that shows there is a problem with Alsa:
#11 0x00007f5485125c1d in EnumDevices (obj=obj@entry=0x7f53f8000958, varname=varname@entry=0x0, idp=idp@entry=0x7f541ba7e8e0, namep=namep@entry=0x7f541ba7e8e8) at alsa.c:709

Which should be already fixed upstream, making this a duplicate of bug 268185

This comment has a workaround:

https://bugs.kde.org/show_bug.cgi?id=268185#c41

*** This bug has been marked as a duplicate of bug 268185 ***