Application: plasmashell (5.4.2)
 (Compiled from sources)
Qt Version: 5.4.2
Operating System: Linux 4.2.0-30-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
I was just trying to change settings and as soon as I clicked on the option the messenger crashed, happens every time I attempt same process.

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 0x7fb4de938800 (LWP 7360))]

Thread 9 (Thread 0x7fb4c9f94700 (LWP 7362)):
#0  0x00007fb4d90e188d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb4dd128bd2 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb4dd12a74f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb4cc2dea39 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#4  0x00007fb4d97d42be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb4d88c36aa in start_thread (arg=0x7fb4c9f94700) at pthread_create.c:333
#6  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fb4c35ef700 (LWP 7366)):
#0  0x00007fb4d5e8d791 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb4d5e8e11b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb4d9a0b29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb4d99b175a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb4d97cf3d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb4dbff7f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb4d97d42be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4d88c36aa in start_thread (arg=0x7fb4c35ef700) at pthread_create.c:333
#9  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb4b8411700 (LWP 7367)):
#0  0x00007fb4d5e8d888 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb4d5e8e11b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb4d9a0b29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb4d99b175a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb4d97cf3d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb4dbff7f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb4d97d42be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4d88c36aa in start_thread (arg=0x7fb4b8411700) at pthread_create.c:333
#9  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb4b5c5f700 (LWP 7371)):
#0  0x00007fb4d97cc4d0 in QMutex::lock() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fb4d9a0a81f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fb4d5e8d77d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb4d5e8e11b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb4d9a0b29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb4d99b175a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb4d97cf3d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4dbff7f85 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fb4d97d42be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb4d88c36aa in start_thread (arg=0x7fb4b5c5f700) at pthread_create.c:333
#11 0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb4a7fff700 (LWP 7372)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb4de383114 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb4de383159 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb4d88c36aa in start_thread (arg=0x7fb4a7fff700) at pthread_create.c:333
#4  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb418c44700 (LWP 7373)):
#0  0x00007fb4d5e8dc78 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb4d5e8e190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb4d9a0b29b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb4d99b175a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb4d97cf3d4 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb41aedb8f7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb4d97d42be in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb4d88c36aa in start_thread (arg=0x7fb418c44700) at pthread_create.c:333
#9  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb40f85d700 (LWP 7439)):
#0  0x00007fb4d90dd44d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb4d5ed14e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb4d5e8dcd4 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb4d5e8e190 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb4d5e8e339 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fb4d5eb4965 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fb4d88c36aa in start_thread (arg=0x7fb40f85d700) at pthread_create.c:333
#8  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb40d5f9700 (LWP 7440)):
#0  0x00007fb4d5e8da69 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb4d5e8e167 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb4d5e8e572 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb40e1874c6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fb4d5eb4965 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb4d88c36aa in start_thread (arg=0x7fb40d5f9700) at pthread_create.c:333
#6  0x00007fb4d90ece9d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb4de938800 (LWP 7360)):
[KCrash Handler]
#6  0x00007fb3ffdf59f8 in KAccountsUiProvider::showNewAccountDialog (this=<optimized out>) at ../../../plugins/kaccounts/kaccounts-ui-provider.cpp:247
#7  0x00007fb4d99e4617 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb3ffdf59b8 in KAccountsUiProvider::init (this=0x4c2cb90, type=<optimized out>) at ../../../plugins/kaccounts/kaccounts-ui-provider.cpp:109
#9  0x00007fb4d99e4617 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fb4da822fe2 in QAbstractButton::clicked(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007fb4da589914 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007fb4da58adf9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007fb4da58af74 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fb4da4d4188 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fb4da491b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fb4da497c7a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fb4d99b3f1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fb4da4966f2 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fb4da4eb440 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fb4da4ed78b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fb4da491b8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fb4da497230 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fb4d99b3f1b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fb4d9cd63c8 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#25 0x00007fb4d9cd8005 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#26 0x00007fb4d9cbd5b8 in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#27 0x00007fb4cc30b250 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so
#28 0x00007fb4d5e8dff7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fb4d5e8e250 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fb4d5e8e2fc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fb4d9a0b27f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007fb4d99b175a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007fb4d99b92cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00000000004322c3 in main (argc=4, argv=<optimized out>) at ../../shell/main.cpp:176

Possible duplicates by query: bug 359769, bug 359676, bug 359037, bug 359022, bug 358902.

Reported using DrKonqi