Bug 427393

Application: korganizer (5.14.1 (20.04.0))

Qt Version: 5.14.2
Frameworks Version: 5.70.0
Operating System: Linux 5.8.0-2-amd64 x86_64
Distribution: Debian GNU/Linux bullseye/sid

-- Information about the crash:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

I was making an event from the 'New Event...' dialog with a title and times put in. I made a new template from this and gave it a nameWhen I open the incidence editor, on the command-line I see
org.kde.pim.incidenceeditor: free slot calculation: invalid range. range(  0 ) / mSlotResolutionSeconds( 900 ) =  0

Now whenever I try to delete this template, it crashes. Just to try to see if I could make a workaround, I created a second template with a new name and was *apparently* able to delete the first (after restarting, it's still there). Still when I try to delete this apparent last one it crashes again.

If I try various combinations of applying, deleting, and/or creating I can get messages like these
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 2084, resource id: 46353165, major code: 40 (TranslateCoords), minor code: 0

or
QSocketNotifier: Invalid socket 12 and type 'Read', disabling...
QSocketNotifier: Invalid socket 13 and type 'Read', disabling...
QSocketNotifier: Invalid socket 20 and type 'Read', disabling...
QSocketNotifier: Invalid socket 21 and type 'Read', disabling...
QSocketNotifier: Invalid socket 22 and type 'Read', disabling...
QSocketNotifier: Invalid socket 34 and type 'Read', disabling...
QSocketNotifier: Invalid socket 31 and type 'Read', disabling...
QSocketNotifier: Invalid socket 32 and type 'Read', disabling...
QSocketNotifier: Invalid socket 38 and type 'Read', disabling...
QSocketNotifier: Invalid socket 16 and type 'Read', disabling...
QSocketNotifier: Invalid socket 18 and type 'Read', disabling...
QSocketNotifier: Invalid socket 8 and type 'Read', disabling...
QSocketNotifier: Invalid socket 10 and type 'Read', disabling...
QSocketNotifier: Invalid socket 19 and type 'Read', disabling...

What follows is a backtrace that seems more relevant than the Dr. Konqi one to the incidence editor:
#0  IncidenceEditorNG::TemplateManagementDialog::slotRemoveTemplate (this=0x7fffe80090e0) at ./src/templatemanagementdialog.cpp:186
#1  0x00007ffff69188c6 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffc310, r=0x7fffe80090e0, this=0x5555568ae0c0)
    at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#2  doActivate<false> (sender=0x5555568a9b20, signal_index=9, argv=argv@entry=0x7fffffffc310) at kernel/qobject.cpp:3870
#3  0x00007ffff6912830 in QMetaObject::activate (sender=sender@entry=0x5555568a9b20,
    m=m@entry=0x7ffff78792a0 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2,
    argv=argv@entry=0x7fffffffc310) at kernel/qobject.cpp:3930
#4  0x00007ffff746c762 in QAbstractButton::clicked (this=this@entry=0x5555568a9b20, _t1=<optimized out>) at .moc/moc_qabstractbutton.cpp:313
#5  0x00007ffff746d0ca in QAbstractButtonPrivate::emitClicked (this=this@entry=0x5555568a9b60) at widgets/qabstractbutton.cpp:415
#6  0x00007ffff746e91f in QAbstractButtonPrivate::click (this=this@entry=0x5555568a9b60) at widgets/qabstractbutton.cpp:408
#7  0x00007ffff746eaf1 in QAbstractButton::mouseReleaseEvent (this=0x5555568a9b20, e=0x7fffffffc8d0) at widgets/qabstractbutton.cpp:1012
#8  0x00007ffff73c052e in QWidget::event (this=0x5555568a9b20, event=0x7fffffffc8d0) at kernel/qwidget.cpp:9033
#9  0x00007ffff738003f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5555568a9b20, e=0x7fffffffc8d0)
    at kernel/qapplication.cpp:3685
#10 0x00007ffff7385781 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3129
#11 0x00007ffff68e3b62 in QCoreApplication::notifyInternal2 (receiver=0x5555568a9b20, event=0x7fffffffc8d0)
    at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#12 0x00007ffff7384696 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x5555568a9b20, event=event@entry=0x7fffffffc8d0,
    alienWidget=alienWidget@entry=0x5555568a9b20, nativeWidget=0x7fffe80090e0, buttonDown=<optimized out>, lastMouseReceiver=...,
    spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2615
#13 0x00007ffff73d895e in QWidgetWindow::handleMouseEvent (this=0x5555568ae840, event=0x7fffffffcb90)
    at /usr/include/c++/10/bits/atomic_base.h:420
#14 0x00007ffff73db7ae in QWidgetWindow::event (this=0x5555568ae840, event=0x7fffffffcb90) at kernel/qwidgetwindow.cpp:295
#15 0x00007ffff738003f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5555568ae840, e=0x7fffffffcb90)
    at kernel/qapplication.cpp:3685
#16 0x00007ffff68e3b62 in QCoreApplication::notifyInternal2 (receiver=0x5555568ae840, event=0x7fffffffcb90)
    at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#17 0x00007ffff6cad45b in QGuiApplicationPrivate::processMouseEvent (e=0x7fffdc090db0) at kernel/qguiapplication.cpp:2203
#18 0x00007ffff6c83c0b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1170
#19 0x00007fffeef05b6a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#20 0x00007ffff3ca2b8b in g_main_dispatch (context=0x7fffe8005000) at ../../../glib/gmain.c:3325
#21 g_main_context_dispatch (context=0x7fffe8005000) at ../../../glib/gmain.c:4016
#22 0x00007ffff3ca2e38 in g_main_context_iterate (context=context@entry=0x7fffe8005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4092
#23 0x00007ffff3ca2eef in g_main_context_iteration (context=0x7fffe8005000, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#24 0x00007ffff69392ff in QEventDispatcherGlib::processEvents (this=0x55555561a0d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#25 0x00007ffff68e24db in QEventLoop::exec (this=this@entry=0x7fffffffced0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#26 0x00007ffff7577017 in QDialog::exec (this=0x7fffe80090e0) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#27 0x00007ffff5fca7df in IncidenceEditorNG::IncidenceDialogPrivate::manageTemplates (this=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:413
#28 0x00007ffff5fca946 in IncidenceEditorNG::IncidenceDialog::slotButtonClicked (this=0x555555fbd360, button=<optimized out>) at ./src/incidencedialog.cpp:827
#29 0x00007ffff69188c6 in QtPrivate::QSlotObjectBase::call (a=0x7fffffffd130, r=0x555555fbd360, this=0x5555566b06b0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#30 doActivate<false> (sender=0x555556170a20, signal_index=7, argv=argv@entry=0x7fffffffd130) at kernel/qobject.cpp:3870
#31 0x00007ffff6912830 in QMetaObject::activate (sender=sender@entry=0x555556170a20, m=m@entry=0x7ffff78823c0 <QDialogButtonBox::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffd130) at kernel/qobject.cpp:3930
#32 0x00007ffff750e02f in QDialogButtonBox::clicked (this=this@entry=0x555556170a20, _t1=<optimized out>, _t1@entry=0x5555561729b0) at .moc/moc_qdialogbuttonbox.cpp:281
#33 0x00007ffff750e6ef in QDialogButtonBoxPrivate::_q_handleButtonClicked (this=<optimized out>) at widgets/qdialogbuttonbox.cpp:870
#34 0x00007ffff6918900 in doActivate<false> (sender=0x5555561729b0, signal_index=9, argv=argv@entry=0x7fffffffd290) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395
#35 0x00007ffff6912830 in QMetaObject::activate (sender=sender@entry=0x5555561729b0, m=m@entry=0x7ffff78792a0 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fffffffd290) at kernel/qobject.cpp:3930
#36 0x00007ffff746c762 in QAbstractButton::clicked (this=this@entry=0x5555561729b0, _t1=<optimized out>) at .moc/moc_qabstractbutton.cpp:313
#37 0x00007ffff746d0ca in QAbstractButtonPrivate::emitClicked (this=this@entry=0x5555561730b0) at widgets/qabstractbutton.cpp:415
#38 0x00007ffff746e91f in QAbstractButtonPrivate::click (this=this@entry=0x5555561730b0) at widgets/qabstractbutton.cpp:408
#39 0x00007ffff746eaf1 in QAbstractButton::mouseReleaseEvent (this=0x5555561729b0, e=0x7fffffffd850) at widgets/qabstractbutton.cpp:1012
#40 0x00007ffff73c052e in QWidget::event (this=0x5555561729b0, event=0x7fffffffd850) at kernel/qwidget.cpp:9033
#41 0x00007ffff738003f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5555561729b0, e=0x7fffffffd850) at kernel/qapplication.cpp:3685
#42 0x00007ffff7385781 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3129
#43 0x00007ffff68e3b62 in QCoreApplication::notifyInternal2 (receiver=0x5555561729b0, event=0x7fffffffd850) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#44 0x00007ffff7384696 in QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x5555561729b0, event=event@entry=0x7fffffffd850, alienWidget=alienWidget@entry=0x5555561729b0, nativeWidget=0x555555fbd360, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2615
#45 0x00007ffff73d895e in QWidgetWindow::handleMouseEvent (this=0x5555566a19d0, event=0x7fffffffdb10) at /usr/include/c++/10/bits/atomic_base.h:420
#46 0x00007ffff73db7ae in QWidgetWindow::event (this=0x5555566a19d0, event=0x7fffffffdb10) at kernel/qwidgetwindow.cpp:295
#47 0x00007ffff738003f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5555566a19d0, e=0x7fffffffdb10) at kernel/qapplication.cpp:3685
#48 0x00007ffff68e3b62 in QCoreApplication::notifyInternal2 (receiver=0x5555566a19d0, event=0x7fffffffdb10) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#49 0x00007ffff6cad45b in QGuiApplicationPrivate::processMouseEvent (e=0x7fffdc0940e0) at kernel/qguiapplication.cpp:2203
#50 0x00007ffff6c83c0b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1170
#51 0x00007fffeef05b6a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#52 0x00007ffff3ca2b8b in g_main_dispatch (context=0x7fffe8005000) at ../../../glib/gmain.c:3325
#53 g_main_context_dispatch (context=0x7fffe8005000) at ../../../glib/gmain.c:4016
#54 0x00007ffff3ca2e38 in g_main_context_iterate (context=context@entry=0x7fffe8005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4092
#55 0x00007ffff3ca2eef in g_main_context_iteration (context=0x7fffe8005000, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#56 0x00007ffff69392ff in QEventDispatcherGlib::processEvents (this=0x55555561a0d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#57 0x00007ffff68e24db in QEventLoop::exec (this=this@entry=0x7fffffffde40, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#58 0x00007ffff68ea782 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#59 0x000055555555e182 in main (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:64
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=54ZJ
-----END PGP SIGNATURE-----

The crash can be reproduced every time.

-- Backtrace:
Application: KOrganizer (korganizer), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7c0db94f40 (LWP 728864))]

Thread 10 (Thread 0x7f7bee909700 (LWP 728892)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f7c14fb8be1 in QtLinuxFutex::_q_futex (val3=0, addr2=0x0, val2=0, val=<optimized out>, op=0, addr=<optimized out>) at thread/qfutex_p.h:133
#2  QtLinuxFutex::futexWait<QBasicAtomicInteger<unsigned int> > (expectedValue=<optimized out>, futex=...) at thread/qfutex_p.h:135
#3  futexSemaphoreTryAcquire_loop<false> (timeout=-1, nn=8589934593, curValue=<optimized out>, u=...) at thread/qsemaphore.cpp:219
#4  futexSemaphoreTryAcquire<false> (timeout=-1, n=<optimized out>, u=...) at thread/qsemaphore.cpp:262
#5  QSemaphore::acquire (this=0x5556c9040048, n=<optimized out>) at thread/qsemaphore.cpp:326
#6  0x00007f7c04089f6c in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/texttospeech/libqttexttospeech_flite.so
#7  0x00007f7c14fb6a01 in QThreadPrivate::start (arg=0x5556c9040010) at thread/qthread_unix.cpp:342
#8  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f7bef8e6700 (LWP 728890)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x5556c8b05a08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5556c8b059b8, cond=0x5556c8b059e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5556c8b059e0, mutex=0x5556c8b059b8) at pthread_cond_wait.c:638
#3  0x00007f7bf6e44c9b in cnd_wait (mtx=0x5556c8b059b8, cond=0x5556c8b059e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5556c8b02d10) at ../src/util/u_queue.c:275
#5  0x00007f7bf6e44777 in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f7be7fff700 (LWP 728889)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x5556c8b05a08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5556c8b059b8, cond=0x5556c8b059e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5556c8b059e0, mutex=0x5556c8b059b8) at pthread_cond_wait.c:638
#3  0x00007f7bf6e44c9b in cnd_wait (mtx=0x5556c8b059b8, cond=0x5556c8b059e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5556c8af65f0) at ../src/util/u_queue.c:275
#5  0x00007f7bf6e44777 in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f7bf00e7700 (LWP 728888)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x5556c8b05a08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5556c8b059b8, cond=0x5556c8b059e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5556c8b059e0, mutex=0x5556c8b059b8) at pthread_cond_wait.c:638
#3  0x00007f7bf6e44c9b in cnd_wait (mtx=0x5556c8b059b8, cond=0x5556c8b059e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5556c8a46b00) at ../src/util/u_queue.c:275
#5  0x00007f7bf6e44777 in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f7bf08e8700 (LWP 728887)):
#0  futex_wait_cancelable (private=0, expected=0, futex_word=0x5556c8b05a08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5556c8b059b8, cond=0x5556c8b059e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5556c8b059e0, mutex=0x5556c8b059b8) at pthread_cond_wait.c:638
#3  0x00007f7bf6e44c9b in cnd_wait (mtx=0x5556c8b059b8, cond=0x5556c8b059e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5556c8a7a6b0) at ../src/util/u_queue.c:275
#5  0x00007f7bf6e44777 in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f7c06568700 (LWP 728879)):
#0  0x00007f7c1254ef02 in g_main_context_iteration (context=<optimized out>, may_block=may_block@entry=1) at ../../../glib/gmain.c:4160
#1  0x00007f7c151e531b in QEventDispatcherGlib::processEvents (this=0x7f7bfc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#2  0x00007f7c1518e4db in QEventLoop::exec (this=this@entry=0x7f7c06567b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#3  0x00007f7c14fb58de in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#4  0x00007f7c14fb6a01 in QThreadPrivate::start (arg=0x5556c8628a40) at thread/qthread_unix.cpp:342
#5  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f7c06d69700 (LWP 728872)):
#0  0x00007f7c14c354bf in __GI___poll (fds=0x7f7bf8066580, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7c1254edce in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f7bf8066580, timeout=<optimized out>, context=0x7f7bf8000c20) at ../../../glib/gmain.c:4395
#2  g_main_context_iterate (context=context@entry=0x7f7bf8000c20, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4087
#3  0x00007f7c1254eeef in g_main_context_iteration (context=0x7f7bf8000c20, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#4  0x00007f7c151e531b in QEventDispatcherGlib::processEvents (this=0x7f7bf8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7c1518e4db in QEventLoop::exec (this=this@entry=0x7f7c06d68b20, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#6  0x00007f7c14fb58de in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#7  0x00007f7c14fb6a01 in QThreadPrivate::start (arg=0x5556c86103b0) at thread/qthread_unix.cpp:342
#8  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7c07fff700 (LWP 728866)):
#0  0x00007f7c14c354bf in __GI___poll (fds=0x7f7c0001a240, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7c1254edce in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f7c0001a240, timeout=<optimized out>, context=0x7f7c00000c20) at ../../../glib/gmain.c:4395
#2  g_main_context_iterate (context=context@entry=0x7f7c00000c20, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4087
#3  0x00007f7c1254eeef in g_main_context_iteration (context=0x7f7c00000c20, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#4  0x00007f7c151e531b in QEventDispatcherGlib::processEvents (this=0x7f7c00000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f7c1518e4db in QEventLoop::exec (this=this@entry=0x7f7c07ffead0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#6  0x00007f7c14fb58de in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#7  0x00007f7c148e8a27 in QDBusConnectionManager::run (this=0x7f7c14955da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#8  0x00007f7c14fb6a01 in QThreadPrivate::start (arg=0x7f7c14955da0 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:342
#9  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f7c0cfed700 (LWP 728865)):
#0  0x00007f7c14c354bf in __GI___poll (fds=fds@entry=0x7f7c0cfeca28, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7c124dfd02 in poll (__timeout=-1, __nfds=1, __fds=0x7f7c0cfeca28) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  _xcb_conn_wait (c=c@entry=0x5556c8563c50, cond=cond@entry=0x5556c8563c90, vector=vector@entry=0x0, count=count@entry=0x0) at ../../src/xcb_conn.c:480
#3  0x00007f7c124e198a in xcb_wait_for_event (c=c@entry=0x5556c8563c50) at ../../src/xcb_in.c:697
#4  0x00007f7c0d7b0b80 in QXcbEventQueue::run (this=0x5556c8558b90) at qxcbeventqueue.cpp:228
#5  0x00007f7c14fb6a01 in QThreadPrivate::start (arg=0x5556c8558b90) at thread/qthread_unix.cpp:342
#6  0x00007f7c12fcdea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f7c14c3feaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f7c0db94f40 (LWP 728864)):
[KCrash Handler]
#6  0x00007f7c14872e70 in QListWidgetItem::setSelected (aselect=<optimized out>, this=<optimized out>) at ./src/templatemanagementdialog.cpp:186
#7  IncidenceEditorNG::TemplateManagementDialog::slotRemoveTemplate (this=0x7f7c0800a070) at ./src/templatemanagementdialog.cpp:186
#8  0x00007f7c151c48c6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe4df12ca0, r=0x7f7c0800a070, this=0x5556c98685b0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#9  doActivate<false> (sender=0x5556c9864080, signal_index=9, argv=argv@entry=0x7ffe4df12ca0) at kernel/qobject.cpp:3870
#10 0x00007f7c151be830 in QMetaObject::activate (sender=sender@entry=0x5556c9864080, m=m@entry=0x7f7c161252a0 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffe4df12ca0) at kernel/qobject.cpp:3930
#11 0x00007f7c15d18762 in QAbstractButton::clicked (this=this@entry=0x5556c9864080, _t1=<optimized out>) at .moc/moc_qabstractbutton.cpp:313
#12 0x00007f7c15d190ca in QAbstractButtonPrivate::emitClicked (this=this@entry=0x5556c98640c0) at widgets/qabstractbutton.cpp:415
#13 0x00007f7c15d1a91f in QAbstractButtonPrivate::click (this=this@entry=0x5556c98640c0) at widgets/qabstractbutton.cpp:408
#14 0x00007f7c15d1aaf1 in QAbstractButton::mouseReleaseEvent (this=0x5556c9864080, e=0x7ffe4df13260) at widgets/qabstractbutton.cpp:1012
#15 0x00007f7c15c6c52e in QWidget::event (this=0x5556c9864080, event=0x7ffe4df13260) at kernel/qwidget.cpp:9033
#16 0x00007f7c15c2c03f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5556c9864080, e=0x7ffe4df13260) at kernel/qapplication.cpp:3685
#17 0x00007f7c15c31781 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3129
#18 0x00007f7c1518fb62 in QCoreApplication::notifyInternal2 (receiver=0x5556c9864080, event=0x7ffe4df13260) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#19 0x00007f7c15c30696 in QApplicationPrivate::sendMouseEvent (receiver=0x5556c9864080, event=0x7ffe4df13260, alienWidget=0x5556c9864080, nativeWidget=0x7f7c0800a070, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2615
#20 0x00007f7c15c8495e in QWidgetWindow::handleMouseEvent(QMouseEvent*) () at /usr/include/c++/10/bits/atomic_base.h:420
#21 0x00007f7c15c877ae in QWidgetWindow::event(QEvent*) () at kernel/qwidgetwindow.cpp:295
#22 0x00007f7c15c2c03f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5556c9868d30, e=0x7ffe4df13520) at kernel/qapplication.cpp:3685
#23 0x00007f7c1518fb62 in QCoreApplication::notifyInternal2 (receiver=0x5556c9868d30, event=0x7ffe4df13520) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#24 0x00007f7c1555945b in QGuiApplicationPrivate::processMouseEvent (e=0x5556c986fd60) at kernel/qguiapplication.cpp:2203
#25 0x00007f7c1552fc0b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1170
#26 0x00007f7c0d7b1b6a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#27 0x00007f7c1254eb8b in g_main_dispatch (context=0x7f7c08005000) at ../../../glib/gmain.c:3325
#28 g_main_context_dispatch (context=0x7f7c08005000) at ../../../glib/gmain.c:4016
#29 0x00007f7c1254ee38 in g_main_context_iterate (context=context@entry=0x7f7c08005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4092
#30 0x00007f7c1254eeef in g_main_context_iteration (context=0x7f7c08005000, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#31 0x00007f7c151e52ff in QEventDispatcherGlib::processEvents (this=0x5556c85c8370, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#32 0x00007f7c1518e4db in QEventLoop::exec (this=this@entry=0x7ffe4df13860, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#33 0x00007f7c15e23017 in QDialog::exec (this=0x7f7c0800a070) at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#34 0x00007f7c148767df in IncidenceEditorNG::IncidenceDialogPrivate::manageTemplates (this=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:413
#35 0x00007f7c14876946 in IncidenceEditorNG::IncidenceDialog::slotButtonClicked (this=0x5556c8f67110, button=<optimized out>) at ./src/incidencedialog.cpp:827
#36 0x00007f7c151c48c6 in QtPrivate::QSlotObjectBase::call (a=0x7ffe4df13ac0, r=0x5556c8f67110, this=0x5556c96653c0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#37 doActivate<false> (sender=0x5556c9123b70, signal_index=7, argv=argv@entry=0x7ffe4df13ac0) at kernel/qobject.cpp:3870
#38 0x00007f7c151be830 in QMetaObject::activate (sender=sender@entry=0x5556c9123b70, m=m@entry=0x7f7c1612e3c0 <QDialogButtonBox::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe4df13ac0) at kernel/qobject.cpp:3930
#39 0x00007f7c15dba02f in QDialogButtonBox::clicked (this=this@entry=0x5556c9123b70, _t1=<optimized out>, _t1@entry=0x5556c9125b00) at .moc/moc_qdialogbuttonbox.cpp:281
#40 0x00007f7c15dba6ef in QDialogButtonBoxPrivate::_q_handleButtonClicked (this=<optimized out>) at widgets/qdialogbuttonbox.cpp:870
#41 0x00007f7c151c4900 in doActivate<false> (sender=0x5556c9125b00, signal_index=9, argv=argv@entry=0x7ffe4df13c20) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:395
#42 0x00007f7c151be830 in QMetaObject::activate (sender=sender@entry=0x5556c9125b00, m=m@entry=0x7f7c161252a0 <QAbstractButton::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffe4df13c20) at kernel/qobject.cpp:3930
#43 0x00007f7c15d18762 in QAbstractButton::clicked (this=this@entry=0x5556c9125b00, _t1=<optimized out>) at .moc/moc_qabstractbutton.cpp:313
#44 0x00007f7c15d190ca in QAbstractButtonPrivate::emitClicked (this=this@entry=0x5556c9126200) at widgets/qabstractbutton.cpp:415
#45 0x00007f7c15d1a91f in QAbstractButtonPrivate::click (this=this@entry=0x5556c9126200) at widgets/qabstractbutton.cpp:408
#46 0x00007f7c15d1aaf1 in QAbstractButton::mouseReleaseEvent (this=0x5556c9125b00, e=0x7ffe4df141e0) at widgets/qabstractbutton.cpp:1012
#47 0x00007f7c15c6c52e in QWidget::event (this=0x5556c9125b00, event=0x7ffe4df141e0) at kernel/qwidget.cpp:9033
#48 0x00007f7c15c2c03f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5556c9125b00, e=0x7ffe4df141e0) at kernel/qapplication.cpp:3685
#49 0x00007f7c15c31781 in QApplication::notify(QObject*, QEvent*) () at kernel/qapplication.cpp:3129
#50 0x00007f7c1518fb62 in QCoreApplication::notifyInternal2 (receiver=0x5556c9125b00, event=0x7ffe4df141e0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#51 0x00007f7c15c30696 in QApplicationPrivate::sendMouseEvent (receiver=0x5556c9125b00, event=0x7ffe4df141e0, alienWidget=0x5556c9125b00, nativeWidget=0x5556c8f67110, buttonDown=<optimized out>, lastMouseReceiver=..., spontaneous=true, onlyDispatchEnterLeave=false) at kernel/qapplication.cpp:2615
#52 0x00007f7c15c8495e in QWidgetWindow::handleMouseEvent(QMouseEvent*) () at /usr/include/c++/10/bits/atomic_base.h:420
#53 0x00007f7c15c877ae in QWidgetWindow::event(QEvent*) () at kernel/qwidgetwindow.cpp:295
#54 0x00007f7c15c2c03f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x5556c966fd70, e=0x7ffe4df144a0) at kernel/qapplication.cpp:3685
#55 0x00007f7c1518fb62 in QCoreApplication::notifyInternal2 (receiver=0x5556c966fd70, event=0x7ffe4df144a0) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:153
#56 0x00007f7c1555945b in QGuiApplicationPrivate::processMouseEvent (e=0x5556c8f311c0) at kernel/qguiapplication.cpp:2203
#57 0x00007f7c1552fc0b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1170
#58 0x00007f7c0d7b1b6a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#59 0x00007f7c1254eb8b in g_main_dispatch (context=0x7f7c08005000) at ../../../glib/gmain.c:3325
#60 g_main_context_dispatch (context=0x7f7c08005000) at ../../../glib/gmain.c:4016
#61 0x00007f7c1254ee38 in g_main_context_iterate (context=context@entry=0x7f7c08005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4092
#62 0x00007f7c1254eeef in g_main_context_iteration (context=0x7f7c08005000, may_block=may_block@entry=1) at ../../../glib/gmain.c:4157
#63 0x00007f7c151e52ff in QEventDispatcherGlib::processEvents (this=0x5556c85c8370, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#64 0x00007f7c1518e4db in QEventLoop::exec (this=this@entry=0x7ffe4df147d0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:136
#65 0x00007f7c15196782 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:118
#66 0x00005556c7c69182 in main (argc=<optimized out>, argv=<optimized out>) at ./src/main.cpp:64
[Inferior 1 (process 728864) detached]

Possible duplicates by query: bug 426999, bug 426906, bug 426596, bug 426094, bug 426090.

Reported using DrKonqi