Application: plasmashell (5.4.2)

Qt Version: 5.4.2
Operating System: Linux 4.2.0-16-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:
This crash happens frequently during a number of activities that involve changing KDE settings, manipulating windows and widgets, and sometimes by (apparently) moving the mouse or something that should be inconsequential.
- Unusual behavior I noticed:
Plasma restarts after the crash but freezes midway between creating panels and finishing them so the user can use them. This results in several minutes of distorted, unusable panels that remain in this state until it recovers.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7efc197fd800 (LWP 32167))]

Thread 26 (Thread 0x7efc03382700 (LWP 32169)):
#0  0x00007efc13fa68dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efc17fedbd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007efc17fef74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007efc05f17a39 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efc03382700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 25 (Thread 0x7efc00b8a700 (LWP 32174)):
#0  0x00007efc10d530bc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc10d532fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc148d029b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efc146943d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc16ebcf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efc137886aa in start_thread (arg=0x7efc00b8a700) at pthread_create.c:333
#8  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 24 (Thread 0x7efbf1f88700 (LWP 32176)):
#0  0x00007efc10d97869 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc10d532e8 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc148d029b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efc146943d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc16ebcf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efc137886aa in start_thread (arg=0x7efbf1f88700) at pthread_create.c:333
#8  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 23 (Thread 0x7efbeb5c8700 (LWP 32180)):
#0  0x00007efc13fa249d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007efc0cdadf75 in ?? () from /usr/lib/nvidia-352/tls/libnvidia-tls.so.352.63
#2  0x00007efc10d964e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc10d52cd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efc10d53190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efc10d532fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007efc148d029b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007efc146943d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007efc16ebcf85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007efc137886aa in start_thread (arg=0x7efbeb5c8700) at pthread_create.c:333
#12 0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 22 (Thread 0x7efbe9d84700 (LWP 32181)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc19248114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007efc19248159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007efc137886aa in start_thread (arg=0x7efbe9d84700) at pthread_create.c:333
#4  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 21 (Thread 0x7efbe3443700 (LWP 32182)):
#0  0x00007efc10d97884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc10d52a59 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc10d53167 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc10d532fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efc148d029b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efc146943d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efc17838ef6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007efc137886aa in start_thread (arg=0x7efbe3443700) at pthread_create.c:333
#10 0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 20 (Thread 0x7efb57fff700 (LWP 32185)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb57fff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 19 (Thread 0x7efb4fbff700 (LWP 32186)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb4fbff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 18 (Thread 0x7efb4dbfd700 (LWP 32187)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb4dbfd700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 17 (Thread 0x7efb38ede700 (LWP 32193)):
#0  0x00007efc10d97884 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efc10d52770 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efc10d5311b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efc10d532fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efc148d029b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efc146943d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efb3b1758f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007efc137886aa in start_thread (arg=0x7efb38ede700) at pthread_create.c:333
#10 0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 16 (Thread 0x7efb33aff700 (LWP 32210)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb33aff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7efb32fcb700 (LWP 32211)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb32fcb700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7efb31f57700 (LWP 32212)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb31f57700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7efb3f9ff700 (LWP 32306)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb3f9ff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7efb3efb3700 (LWP 32307)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb3efb3700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7efb3e34b700 (LWP 32308)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb3e34b700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7efb3d7ff700 (LWP 32309)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb3d7ff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7efb3ccb3700 (LWP 32310)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb3ccb3700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7efb16188700 (LWP 32311)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb16188700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7efb15987700 (LWP 32550)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efb15987700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7efaf24c6700 (LWP 32551)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efaf24c6700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7efaf17c1700 (LWP 32552)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efaf17c1700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7efaf0bbc700 (LWP 32700)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efaf0bbc700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7efae3fff700 (LWP 32741)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efae3fff700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7efae293d700 (LWP 483)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007efc1469a55b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007efc178abb3e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#3  0x00007efc178ac3c3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007efc146992be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efc137886aa in start_thread (arg=0x7efae293d700) at pthread_create.c:333
#6  0x00007efc13fb1eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7efc197fd800 (LWP 32167)):
[KCrash Handler]
#6  0x00007efc16ca2e38 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007efc16f01c2a in QQmlDelegateModel::_q_itemsChanged(int, int, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007efc16f2822c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007efc16f28605 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007efc148a9940 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007efc1492064c in QAbstractItemModel::dataChanged(QModelIndex const&, QModelIndex const&, QVector<int> const&) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007efbe1413fd4 in TaskManager::TasksModelPrivate::itemChanged (this=0x2adaf10, changes=...) at ../../libtaskmanager/tasksmodel.cpp:521
#13 0x00007efbe1415247 in TaskManager::TasksModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=0x7ffcc67fc1e0) at ./moc_tasksmodel.cpp:213
#14 0x00007efc148a978a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007efbe141d1a8 in TaskManager::AbstractGroupableItem::changed (this=<optimized out>, _t1=...) at moc_abstractgroupableitem.cpp:222
#16 0x00007efbe140a620 in TaskManager::TaskItemPrivate::filterChange (change=..., this=<optimized out>) at ../../libtaskmanager/taskitem.cpp:73
#17 TaskManager::TaskItem::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskitem.cpp:146
#18 0x00007efc148a978a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007efbe141d398 in TaskManager::Task::changed (this=this@entry=0x59076d0, _t1=...) at moc_task.cpp:354
#20 0x00007efbe13fca6b in TaskManager::Task::setActive (this=0x59076d0, a=<optimized out>) at ../../libtaskmanager/task.cpp:178
#21 0x00007efbe141042c in TaskManager::TaskManager::activeWindowChanged (this=0x7efbe163af80 <TaskManager::(anonymous namespace)::Q_QGS_privateTaskManagerSelf::innerFunction()::holder>, w=<optimized out>) at ../../libtaskmanager/taskmanager.cpp:412
#22 0x00007efbe14126e7 in TaskManager::TaskManager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskmanager.cpp:175
#23 0x00007efc148a978a in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007efc169e8ec2 in KWindowSystem::activeWindowChanged (this=this@entry=0x7efc16bf7c00 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=96469125) at moc_kwindowsystem.cpp:302
#25 0x00007efc00d9e1e1 in NETEventFilter::nativeEventFilter (this=0x2ab7e80, ev=0x7efbfc003c80) at ../../../../src/platforms/xcb/kwindowsystem.cpp:208
#26 0x00007efc148758ef in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007efc05f1935e in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#28 0x00007efc05f1a3b3 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#29 0x00007efc148aa651 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007efc15356b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007efc1535c230 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007efc14878f1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007efc1487b057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007efc148cfe73 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007efc10d52ff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007efc10d53250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007efc10d532fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007efc148d027f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007efc1487675a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007efc1487e2cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#41 0x00000000004322c3 in main (argc=3, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 357563, bug 357512, bug 357494, bug 357482, bug 357309.

Reported using DrKonqi