Bug 344993

Summary: Desktop crashes after using the alternate menu
Product: [Plasma] plasmashell Reporter: Lord Sunday <ahaholder7>
Component: Application Menu (Kicker) widgetAssignee: Eike Hein <hein>
Status: RESOLVED BACKTRACE    
Severity: crash CC: bhush94, mklapetek, notmart
Priority: NOR Keywords: drkonqi
Version: 5.2.1   
Target Milestone: 1.0   
Platform: unspecified   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Lord Sunday 2015-03-10 02:06:44 UTC 
Application: plasmashell ()

Qt Version: 5.4.1
Operating System: Linux 3.18.6-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed: 
I was switching from the Windows7-esque menu to the one that looks more like it came from Windows 2000,. I had to switch back and forth between the two several times so that I could see what favorite applications I needed to migrate to the menu. After this, I was simply hovering between a few of the different category menus to seewhat all was there. This is when the crashes began occuring.

- Unusual behavior I noticed:
As I switched (rather rapidly) between categories, I noticed that the Education tab appeared in the correct spot, once above it, and immediately crashed the desktop. Further investigation shows me that hovering on, then going into the programs under Education, then back out and hovering over a different category repeatedly crashed the desktop. Although possibly unrelated, I also noticed that the Windows 2000-esque menu forgot my customized favorite applications once and I had to redo them from scratch.

- Custom settings of the application:
Customized favorite applications. I noticed that this was forgotten once, so I thought it might be important.

The crash can be reproduced every time.

-- Backtrace:
Application: plasmashell (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4dbc2747c0 (LWP 2893))]

Thread 34 (Thread 0x7f4db9a9e700 (LWP 2895)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dcef969f2 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f4dcef9856f in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f4dbc05c399 in ?? () from /usr/lib/qt/plugins/platforms/libqxcb.so
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 33 (Thread 0x7f4db35ef700 (LWP 2897)):
#0  0x00007f4dc7c80004 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b84d in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 32 (Thread 0x7f4da9d43700 (LWP 2898)):
#0  0x00007f4dc7c3b42c in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 31 (Thread 0x7f4da37fe700 (LWP 2902)):
#0  0x00007f4dc7c389e7 in ?? () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3aecb in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 30 (Thread 0x7f4da27fd700 (LWP 2903)):
#0  0x00007f4dc7c80004 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b1e9 in g_main_context_query () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b91a in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 29 (Thread 0x7f4da17fc700 (LWP 2904)):
#0  0x00007f4dcb0fb50d in read () from /usr/lib/libc.so.6
#1  0x00007f4dc3176f45 in ?? () from /usr/lib/libnvidia-tls.so.346.47
#2  0x00007f4dc7c7eb50 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b42c in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#6  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#10 0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#11 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#12 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 28 (Thread 0x7f4d93fff700 (LWP 2905)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 27 (Thread 0x7f4d92ffe700 (LWP 2906)):
#0  0x00007f4dc7c3af41 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 26 (Thread 0x7f4d91ffd700 (LWP 2907)):
#0  0x00007f4dcb0fb50d in read () from /usr/lib/libc.so.6
#1  0x00007f4dc3176f45 in ?? () from /usr/lib/libnvidia-tls.so.346.47
#2  0x00007f4dc7c7eb50 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b42c in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#6  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#10 0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#11 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#12 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 25 (Thread 0x7f4d90ffc700 (LWP 2908)):
#0  0x00007f4dcb76d45a in QMutex::lock() () from /usr/lib/libQt5Core.so.5
#1  0x00007f4dcb9b89e9 in ?? () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dc7c3b381 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#9  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#10 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 24 (Thread 0x7f4d7f7ff700 (LWP 2909)):
#0  0x00007f4dc7c80004 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b84d in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 23 (Thread 0x7f4d7e7fe700 (LWP 2910)):
#0  0x00007f4dcb82a8a4 in QElapsedTimer::isMonotonic() () from /usr/lib/libQt5Core.so.5
#1  0x00007f4dcb9b700e in QTimerInfoList::repairTimersIfNeeded() () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dcb9b7083 in QTimerInfoList::timerWait(timespec&) () from /usr/lib/libQt5Core.so.5
#3  0x00007f4dcb9b848e in ?? () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dc7c3af2d in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#6  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#7  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#10 0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#11 0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#12 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#13 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 22 (Thread 0x7f4d7d7fd700 (LWP 2911)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3af39 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 21 (Thread 0x7f4d6bfff700 (LWP 2912)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcfdbf634 in ?? () from /usr/lib/libQt5Script.so.5
#2  0x00007f4dcfdbf679 in ?? () from /usr/lib/libQt5Script.so.5
#3  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#4  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 20 (Thread 0x7f4ceb7fe700 (LWP 2913)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b98a in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 19 (Thread 0x7f4ce9bea700 (LWP 2914)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 18 (Thread 0x7f4ce3fff700 (LWP 2915)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3adf7 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce291ba6 in ?? () from /usr/lib/libQt5Quick.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 17 (Thread 0x7f4ce30ca700 (LWP 2917)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcb7766bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dce3037f2 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0x00007f4dce303c30 in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 16 (Thread 0x7f4ce14c8700 (LWP 2918)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 15 (Thread 0x7f4cce73f700 (LWP 2920)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3af39 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 14 (Thread 0x7f4ccd63c700 (LWP 2921)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3af39 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 13 (Thread 0x7f4cc7fff700 (LWP 2922)):
#0  0x00007f4dcb0fb50d in read () from /usr/lib/libc.so.6
#1  0x00007f4dc3176f45 in ?? () from /usr/lib/libnvidia-tls.so.346.47
#2  0x00007f4dc7c7eb50 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b42c in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#6  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#10 0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#11 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#12 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 12 (Thread 0x7f4cc6ffe700 (LWP 2923)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 11 (Thread 0x7f4cc5ffd700 (LWP 2924)):
#0  0x00007f4dcb114a2f in __libc_enable_asynccancel () from /usr/lib/libc.so.6
#1  0x00007f4dcb0ff4e2 in poll () from /usr/lib/libc.so.6
#2  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 10 (Thread 0x7f4cc4ffc700 (LWP 2925)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 9 (Thread 0x7f4cb37ff700 (LWP 2926)):
#0  0x00007f4dcb76d45a in QMutex::lock() () from /usr/lib/libQt5Core.so.5
#1  0x00007f4dcb9b862b in ?? () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dc7c3af2d in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b8cb in ?? () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#9  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#10 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 8 (Thread 0x7f4cb27fe700 (LWP 2927)):
#0  0x00007f4dc7c7ffe9 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f4dc7c3b89d in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7f4ca7fff700 (LWP 2928)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcb7766bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dce3037f2 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0x00007f4dce303c30 in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7f4ca73fd700 (LWP 2929)):
#0  0x00007f4dcb0ff4ed in poll () from /usr/lib/libc.so.6
#1  0x00007f4dc7c3b9a4 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#7  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 5 (Thread 0x7f4ca633c700 (LWP 2930)):
#0  0x00007f4dcb0fb50d in read () from /usr/lib/libc.so.6
#1  0x00007f4dc3176f45 in ?? () from /usr/lib/libnvidia-tls.so.346.47
#2  0x00007f4dc7c7eb50 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f4dc7c3b42c in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#4  0x00007f4dc7c3b943 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#6  0x00007f4dcb9b908c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#7  0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#8  0x00007f4dcb7705d4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#9  0x00007f4dce039835 in ?? () from /usr/lib/libQt5Qml.so.5
#10 0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#11 0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#12 0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f4c9354f700 (LWP 2931)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcb7766bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dce3037f2 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0x00007f4dce303c30 in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f4c92bc3700 (LWP 2932)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcb7766bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dce3037f2 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0x00007f4dce303c30 in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f4c91e62700 (LWP 2933)):
#0  0x00007f4dca7029af in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
#1  0x00007f4dcb7766bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQt5Core.so.5
#2  0x00007f4dce3037f2 in ?? () from /usr/lib/libQt5Quick.so.5
#3  0x00007f4dce303c30 in ?? () from /usr/lib/libQt5Quick.so.5
#4  0x00007f4dcb77555e in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f4dca6fd374 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f4dcb10827d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f4dbc2747c0 (LWP 2893)):
[KCrash Handler]
#5  0x00007f4dcb76d455 in QMutex::lock() () from /usr/lib/libQt5Core.so.5
#6  0x00007f4dce305394 in ?? () from /usr/lib/libQt5Quick.so.5
#7  0x00007f4dce30651d in ?? () from /usr/lib/libQt5Quick.so.5
#8  0x00007f4dcc458acc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#9  0x00007f4dcc45df10 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5
#10 0x00007f4dcb960d1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5
#11 0x00007f4dcb9b7f6d in QTimerInfoList::activateTimers() () from /usr/lib/libQt5Core.so.5
#12 0x00007f4dcb9b83b1 in ?? () from /usr/lib/libQt5Core.so.5
#13 0x00007f4dc7c3b71d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#14 0x00007f4dc7c3ba08 in ?? () from /usr/lib/libglib-2.0.so.0
#15 0x00007f4dc7c3babc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#16 0x00007f4dcb9b9077 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#17 0x00007f4dcb95e7b2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#18 0x00007f4dcb96618c in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#19 0x000000000042e6ff in main ()

Possible duplicates by query: bug 344732, bug 344544, bug 344471, bug 344224, bug 344069.

Reported using DrKonqi
Comment 1 Marco Martin 2015-03-31 09:01:25 UTC 
needs debug symbols installed for Qt

#6  0x00007f4dce305394 in ?? () from /usr/lib/libQt5Quick.so.5
#7  0x00007f4dce30651d in ?? () from /usr/lib/libQt5Quick.so.5
Comment 2 Martin Klapetek 2015-05-13 16:57:00 UTC 
Please install the debug packages (qtdeclarative5-dbg on kubuntu) and post an updated backtrace, otherwise it's not much helpful.

Thank you.
Comment 3 Martin Klapetek 2016-02-03 20:59:03 UTC 
No response for long time, we cannot do anything without the updated
backtrace.

If you can still reproduce this with Plasma 5.5, please follow comment #2
and post updated backtrace.

Thanks