Bug 397230

Summary: Plasma crashes at start in Phonon gstreamer
Product: [Plasma] plasmashell Reporter: Francisco F. <suse>
Component: generalAssignee: David Edmundson <kde>
Status: RESOLVED FIXED    
Severity: crash CC: kde, notmart, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.12.5   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Francisco F. 2018-08-07 05:29:46 UTC 
Application: plasmashell (5.12.5)

Qt Version: 5.9.4
Frameworks Version: 5.45.0
Operating System: Linux 4.12.14-lp150.12.7-default x86_64
Distribution: "openSUSE Leap 15.0"

-- Information about the crash:
- Unusual behavior I noticed:
Occurs when entering the desk, plasma begins to restart every 2 or 3 seconds.
I do not perform any other action

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f86c9e4c100 (LWP 6277))]

Thread 19 (Thread 0x7f85829fd700 (LWP 6762)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 18 (Thread 0x7f85837fe700 (LWP 6759)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 17 (Thread 0x7f859226e700 (LWP 6681)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 16 (Thread 0x7f8592cdf700 (LWP 6678)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 15 (Thread 0x7f8593be1700 (LWP 6664)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 14 (Thread 0x7f85a2ffd700 (LWP 6653)):
#0  0x00007f86c322b11c in clock_gettime () at /lib64/libc.so.6
#1  0x00007f86c3b41621 in  () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c3b3fef9 in QTimerInfoList::updateCurrentTime() () at /usr/lib64/libQt5Core.so.5
#3  0x00007f86c3b40475 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f86c3b419be in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86bdb02668 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#6  0x00007f86bdb0303b in  () at /usr/lib64/libglib-2.0.so.0
#7  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#8  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#9  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#11 0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#12 0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#13 0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 13 (Thread 0x7f85a37fe700 (LWP 6652)):
#0  0x00007ffc892e3ad5 in clock_gettime ()
#1  0x00007f86c322b116 in clock_gettime () at /lib64/libc.so.6
#2  0x00007f86c3b41621 in  () at /usr/lib64/libQt5Core.so.5
#3  0x00007f86c3b3fef9 in QTimerInfoList::updateCurrentTime() () at /usr/lib64/libQt5Core.so.5
#4  0x00007f86c3b40475 in QTimerInfoList::timerWait(timespec&) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c3b419be in  () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86bdb02668 in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#7  0x00007f86bdb0303b in  () at /usr/lib64/libglib-2.0.so.0
#8  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#9  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#10 0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#11 0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#12 0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#13 0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#14 0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f85a3fff700 (LWP 6631)):
#0  0x00007f86c3b41fd7 in  () at /usr/lib64/libQt5Core.so.5
#1  0x00007f86bdb02b29 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb030b0 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f85b0ffd700 (LWP 6630)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c359b70c in std::condition_variable::wait(std::unique_lock<std::mutex>&) () at /usr/lib64/libstdc++.so.6
#2  0x00007f85f63e1e09 in WTF::ParkingLot::parkConditionally(void const*, std::function<bool ()>, std::function<void ()>, std::chrono::time_point<std::chrono::_V2::steady_clock, std::chrono::duration<long, std::ratio<1l, 1000000000l> > >) () at /usr/lib64/libQt5WebKit.so.5
#3  0x00007f85f6ba7eee in  () at /usr/lib64/libQt5WebKit.so.5
#4  0x00007f85f6ba9a09 in  () at /usr/lib64/libQt5WebKit.so.5
#5  0x00007f85f63e4de8 in  () at /usr/lib64/libQt5WebKit.so.5
#6  0x00007f85f64174aa in  () at /usr/lib64/libQt5WebKit.so.5
#7  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f85b17fe700 (LWP 6629)):
#0  0x00007f86bdb48759 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f86bdb02c96 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb03190 in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f85b1fff700 (LWP 6628)):
#0  0x00007f86c320eb78 in read () at /lib64/libc.so.6
#1  0x00007f86bdb47420 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb02bf7 in g_main_context_check () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86bdb030b0 in  () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#5  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f85f320f700 (LWP 6617)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c359b70c in std::condition_variable::wait(std::unique_lock<std::mutex>&) () at /usr/lib64/libstdc++.so.6
#2  0x00007f85f79d9657 in  () at /usr/lib64/libQt5WebKit.so.5
#3  0x00007f85f79d9799 in  () at /usr/lib64/libQt5WebKit.so.5
#4  0x00007f86c35a140f in  () at /usr/lib64/libstdc++.so.6
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f860dc6b700 (LWP 6498)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c391f3eb in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f86c7691398 in  () at /usr/lib64/libQt5Quick.so.5
#3  0x00007f86c76917ca in  () at /usr/lib64/libQt5Quick.so.5
#4  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f860f440700 (LWP 6468)):
#0  0x00007f86c321308b in poll () at /lib64/libc.so.6
#1  0x00007f86bdb03109 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c7615cf2 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f869f7c9700 (LWP 6342)):
#0  0x00007f86c2ad289d in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f86c95235e4 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f86c9523629 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f86a9d86700 (LWP 6330)):
#0  0x00007f86bdb48759 in g_mutex_lock () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f86bdb03010 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c71c6cb5 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f86ab7cb700 (LWP 6329)):
#0  0x00007f86bdb00007 in  () at /usr/lib64/libglib-2.0.so.0
#1  0x00007f86bdb0259b in g_main_context_prepare () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb0303b in  () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#4  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#7  0x00007f86c71c6cb5 in  () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#9  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f86b1357700 (LWP 6304)):
#0  0x00007f86c321308b in poll () at /lib64/libc.so.6
#1  0x00007f86bdb03109 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f86c3b41c0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f86c39194da in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f86c53b5985 in  () at /usr/lib64/libQt5DBus.so.5
#7  0x00007f86c391e0ce in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f86c2acc559 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f86c321d82f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f86c9e4c100 (LWP 6277)):
[KCrash Handler]
#6  0x00007f8581b4e125 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#7  0x00007f8581b4e2d2 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#8  0x00007f8581b505f6 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#9  0x00007f8581b50fc0 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#10 0x00007f8581b53731 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#11 0x00007f86c3b1904a in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/libQt5Core.so.5
#12 0x00007f8581b5e1f3 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#13 0x00007f86bd0646bd in  () at /usr/lib64/libffi.so.7
#14 0x00007f86bd063bcf in  () at /usr/lib64/libffi.so.7
#15 0x00007f86047371c4 in g_cclosure_marshal_generic () at /usr/lib64/libgobject-2.0.so.0
#16 0x00007f860473693d in g_closure_invoke () at /usr/lib64/libgobject-2.0.so.0
#17 0x00007f86047499fe in  () at /usr/lib64/libgobject-2.0.so.0
#18 0x00007f860475222c in g_signal_emit_valist () at /usr/lib64/libgobject-2.0.so.0
#19 0x00007f8604752c4f in g_signal_emit () at /usr/lib64/libgobject-2.0.so.0
#20 0x00007f85f42780a4 in gst_bus_sync_signal_handler () at /usr/lib64/libgstreamer-1.0.so.0
#21 0x00007f85f4278353 in gst_bus_post () at /usr/lib64/libgstreamer-1.0.so.0
#22 0x00007f85f428da96 in  () at /usr/lib64/libgstreamer-1.0.so.0
#23 0x00007f85f426a1ed in  () at /usr/lib64/libgstreamer-1.0.so.0
#24 0x00007f85f42907ee in gst_element_post_message () at /usr/lib64/libgstreamer-1.0.so.0
#25 0x00007f85f42921c5 in gst_element_continue_state () at /usr/lib64/libgstreamer-1.0.so.0
#26 0x00007f85f4291b05 in gst_element_change_state () at /usr/lib64/libgstreamer-1.0.so.0
#27 0x00007f85f4291f59 in  () at /usr/lib64/libgstreamer-1.0.so.0
#28 0x00007f8581b5d65c in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#29 0x00007f8581b511e9 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#30 0x00007f8581b512d8 in  () at /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#31 0x00007f86c147e139 in  () at /usr/lib64/libKF5Notifications.so.5
#32 0x00007f86c1458bb1 in  () at /usr/lib64/libKF5Notifications.so.5
#33 0x00007f86c14557c4 in KNotification::sendEvent() () at /usr/lib64/libKF5Notifications.so.5
#34 0x00007f86c3b19a32 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#35 0x00007f86c4ccee8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#36 0x00007f86c4cd6244 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#37 0x00007f86c3aeba88 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#38 0x00007f86c3aee075 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#39 0x00007f86c3b42573 in  () at /usr/lib64/libQt5Core.so.5
#40 0x00007f86bdb02f57 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#41 0x00007f86bdb03190 in  () at /usr/lib64/libglib-2.0.so.0
#42 0x00007f86bdb0321c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#43 0x00007f86c3b41bef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#44 0x00007f86c3aea09a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#45 0x00007f86c3af29e4 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#46 0x00005574e5f6fe20 in  ()
#47 0x00007f86c3145f4a in __libc_start_main () at /lib64/libc.so.6
#48 0x00005574e5f701ca in _start ()

Reported using DrKonqi
Comment 1 Kai Uwe Broulik 2018-08-07 09:22:11 UTC 
It seems to show a notification and crash in Phonon/GStreamer.
Comment 2 Francisco F. 2018-08-09 12:33:27 UTC 
I uninstalled GStreamer, Phonon and practically all KDE.
Deleting cache and congfigurations.
I reinstall everything and it remains the same.
Then I update with Packman and it's still the same.
With LXQt it works correctly.
Restarting the computer or the KDE session sometimes stops restarting
Comment 3 Francisco F. 2018-12-13 12:58:28 UTC 
(In reply to Francisco F. from comment #2)
> I uninstalled GStreamer, Phonon and practically all KDE.
> Deleting cache and congfigurations.
> I reinstall everything and it remains the same.
> Then I update with Packman and it's still the same.
> With LXQt it works correctly.
> Restarting the computer or the KDE session sometimes stops restarting

Solved when deleting directory .KDE4.
Anyway, a bad configuration of the sound should not restart the whole system. The normal thing would be to block the sound and warn that it is malfunctioning.
Comment 4 Kai Uwe Broulik 2018-12-13 13:00:26 UTC 
I ported KNotifications to support libcanberra to avoid the rat's tail of issues that comes with using Phonon. Not strictly fixed, but close enough.