Application: plasmashell (5.4.3)

Qt Version: 5.5.1
Operating System: Linux 4.5.0-towo.1-siduction-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

-- Information about the crash:
- What I was doing when the application crashed:
changing screen resolution and disabled external monitor

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 0x7fb2e5d7b940 (LWP 3571))]

Thread 8 (Thread 0x7fb2d09d4700 (LWP 3575)):
#0  0x00007fb2e04b3e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2e4566382 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb2e4567ff7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb2d1ccb789 in QXcbEventReader::run (this=0x2057d70) at qxcbconnection.cpp:1230
#4  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x2057d70) at thread/qthread_unix.cpp:331
#5  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2d09d4700) at pthread_create.c:334
#6  0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb2c9fed700 (LWP 3603)):
#0  0x00007fb2e04b3e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2dd26132c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2e0dcfa5b in QEventDispatcherGlib::processEvents (this=0x7fb2c40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7fb2c9fecc60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb2e0b93854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb2e3426105 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x212d7f0) at thread/qthread_unix.cpp:331
#8  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2c9fed700) at pthread_create.c:334
#9  0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb2c27c3700 (LWP 3632)):
#0  0x00007fb2dd2a5a94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2dd260d59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2dd2612d0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2e0dcfa5b in QEventDispatcherGlib::processEvents (this=0x7fb2bc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7fb2c27c2c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb2e0b93854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fb2e3426105 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x232e110) at thread/qthread_unix.cpp:331
#9  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2c27c3700) at pthread_create.c:334
#10 0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb2bb674700 (LWP 4981)):
#0  0x00007fb2e04b3e4d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb2dd26132c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2e0dcfa5b in QEventDispatcherGlib::processEvents (this=0x7fb2b40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7fb2bb673c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb2e0b93854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb2e3426105 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x231b4b0) at thread/qthread_unix.cpp:331
#8  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2bb674700) at pthread_create.c:334
#9  0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb2b9d75700 (LWP 4982)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb2e57d31c4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb2e57d3209 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2b9d75700) at pthread_create.c:334
#4  0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb2328c9700 (LWP 4983)):
#0  0x00007fb2dd2a5a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2dd2608c9 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2dd26125b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2e0dcfa5b in QEventDispatcherGlib::processEvents (this=0x7fb22c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7fb2328c8c10, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007fb2e0b93854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007fb2e3dae136 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x29f10d0) at thread/qthread_unix.cpp:331
#9  0x00007fb2dfcbc454 in start_thread (arg=0x7fb2328c9700) at pthread_create.c:334
#10 0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb226f46700 (LWP 4989)):
#0  0x00007fb2dd260850 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2dd26125b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2e0dcfa5b in QEventDispatcherGlib::processEvents (this=0x7fb2200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7fb226f45c40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb2e0b93854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb229440637 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb2e0b987fe in QThreadPrivate::start (arg=0x4d35060) at thread/qthread_unix.cpp:331
#8  0x00007fb2dfcbc454 in start_thread (arg=0x7fb226f46700) at pthread_create.c:334
#9  0x00007fb2e04bcedd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb2e5d7b940 (LWP 3571)):
[KCrash Handler]
#6  QXcbScreen::mapToNative (this=this@entry=0x0, rect=...) at qxcbscreen.cpp:267
#7  0x00007fb2d1ce1713 in QXcbWindow::mapToNative (this=<optimized out>, rect=..., screen=0x0) at qxcbwindow.cpp:199
#8  0x00007fb2d1ce2f8b in QXcbWindow::propagateSizeHints (this=0x5460220) at qxcbwindow.cpp:1618
#9  0x00007fb2d1ce814c in QXcbWindow::setGeometry (this=0x5460220, rect=...) at qxcbwindow.cpp:713
#10 0x00007fb2e10c12f4 in QWindow::setPosition (this=this@entry=0x4759c40, pt=...) at kernel/qwindow.cpp:1537
#11 0x00007fb2e5901414 in PlasmaQuick::Dialog::setVisible (this=0x4759c40, visible=<optimized out>) at ../../../src/plasmaquick/dialog.cpp:1233
#12 0x00007fb2e0da7e0f in QtPrivate::QSlotObjectBase::call (a=0x7ffd02886010, r=0x475bc90, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#13 QMetaObject::activate (sender=sender@entry=0x475bc90, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3698
#14 0x00007fb2e0da8797 in QMetaObject::activate (sender=sender@entry=0x475bc90, m=m@entry=0x7fb2e0fc2840 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3578
#15 0x00007fb2e0e27660 in QTimer::timeout (this=this@entry=0x475bc90) at .moc/moc_qtimer.cpp:197
#16 0x00007fb2e0db4838 in QTimer::timerEvent (this=0x475bc90, e=<optimized out>) at kernel/qtimer.cpp:247
#17 0x00007fb2e0da8e13 in QObject::event (this=0x475bc90, e=<optimized out>) at kernel/qobject.cpp:1261
#18 0x00007fb2e187bffc in QApplicationPrivate::notify_helper (this=this@entry=0x204d190, receiver=receiver@entry=0x475bc90, e=e@entry=0x7ffd02886340) at kernel/qapplication.cpp:3716
#19 0x00007fb2e18814b6 in QApplication::notify (this=0x7ffd02886700, receiver=0x475bc90, e=0x7ffd02886340) at kernel/qapplication.cpp:3499
#20 0x00007fb2e0d795ab in QCoreApplication::notifyInternal (this=0x7ffd02886700, receiver=0x475bc90, event=event@entry=0x7ffd02886340) at kernel/qcoreapplication.cpp:965
#21 0x00007fb2e0dce85d in QCoreApplication::sendEvent (event=0x7ffd02886340, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#22 QTimerInfoList::activateTimers (this=0x2081bd0) at kernel/qtimerinfo_unix.cpp:637
#23 0x00007fb2e0dced61 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:177
#24 0x00007fb2dd261137 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fb2dd261390 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fb2dd26143c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fb2e0dcfa3f in QEventDispatcherGlib::processEvents (this=0x20813d0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#28 0x00007fb2e0d76d6a in QEventLoop::exec (this=this@entry=0x7ffd02886580, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#29 0x00007fb2e0d7ee0c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#30 0x00007fb2e10b284c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1527
#31 0x00007fb2e1878435 in QApplication::exec () at kernel/qapplication.cpp:2976
#32 0x0000000000431b03 in main (argc=2, argv=<optimized out>) at /build/plasma-workspace-KFkJSD/plasma-workspace-5.4.3/shell/main.cpp:176

Possible duplicates by query: bug 360635, bug 360165, bug 358020, bug 351359, bug 350940.

Reported using DrKonqi