Bug 379340

Summary: Plasma crashing during startup after upgrade to KDE Neon 5.9.5
Product: [Plasma] plasmashell Reporter: Nick <nickeforos>
Component: Task Manager and Icons-Only Task Manager widgetsAssignee: Eike Hein <hein>
Status: RESOLVED DUPLICATE    
Severity: crash CC: bshah, plasma-bugs-null
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.9.5   
Target Milestone: 1.0   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Nick 2017-04-29 09:11:21 UTC 
Application: plasmashell (5.9.5)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.4.0-75-generic x86_64
Distribution: KDE neon User Edition 5.9

-- Information about the crash:
- What I was doing when the application crashed:

I have started some of my apps from the top panel.

- Unusual behavior I noticed:

Sometimes I got error messages that ksystraycmd and recollindex crashed too. I had Recoll long time ago but I have uninstalled it. After the latest crash I have found out that there was a recollindex.desktop in the autostart folder in my home folder which I have now removed.

The crash can be reproduced every time.

-- 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 0x7f5d9d7f58c0 (LWP 2229))]

Thread 16 (Thread 0x7f5ca77fd700 (LWP 5398)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x3c32b60) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x3c329a0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x3c32920) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5ca77fd700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 15 (Thread 0x7f5ca7ffe700 (LWP 5397)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x2b7f550) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1bf0370, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x1bf02f0) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5ca7ffe700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 14 (Thread 0x7f5cb90a8700 (LWP 2832)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x375efb0) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x31a2ab0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x31a2a30) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5cb90a8700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 13 (Thread 0x7f5cbb667700 (LWP 2825)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x34d8820) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x34e5ca0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x34e5c20) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5cbb667700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 12 (Thread 0x7f5cbbfff700 (LWP 2821)):
#0  0x00007f5d98133b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d9c1abc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5d9c1ac31d in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5d9c1ac3a5 in xcb_writev () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f5d9c4014ae in _XSend () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007f5d9c4017f5 in _XFlush () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#6  0x00007f5d9c3e2e4a in XFlush () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#7  0x00007f5d9d9cc4e2 in QGLXContext::swapBuffers (this=0x2f11460, surface=0x1225490) at qglxintegration.cpp:541
#8  0x00007f5d98d7e50d in QOpenGLContext::swapBuffers (this=0x2e53ed0, surface=<optimized out>) at kernel/qopenglcontext.cpp:1063
#9  0x00007f5d9b851420 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f5d9b855c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f5d98832b48 in QThreadPrivate::start (arg=0x3352770) at thread/qthread_unix.cpp:368
#12 0x00007f5d976d86ba in start_thread (arg=0x7f5cbbfff700) at pthread_create.c:333
#13 0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f5cc2d9e700 (LWP 2814)):
#0  0x00007f5d98133b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d938ae38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x7f5cbc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7f5cc2d9dcc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f5d9882df64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f5cc527c587 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x30d5950) at thread/qthread_unix.cpp:368
#8  0x00007f5d976d86ba in start_thread (arg=0x7f5cc2d9e700) at pthread_create.c:333
#9  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f5cdabfe700 (LWP 2800)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1ee9f90) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ee9b00, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x1ee9a80) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5cdabfe700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f5ce0c13700 (LWP 2794)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1b50050) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x125a210, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x125a190) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5ce0c13700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f5ce3fff700 (LWP 2783)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d988339fb in QWaitConditionPrivate::wait (time=18446744073709551615, this=0x1343030) at thread/qwaitcondition_unix.cpp:143
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1256650, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:215
#3  0x00007f5d9b85547d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#4  0x00007f5d9b855d55 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x12565d0) at thread/qthread_unix.cpp:368
#6  0x00007f5d976d86ba in start_thread (arg=0x7f5ce3fff700) at pthread_create.c:333
#7  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f5ce8c3c700 (LWP 2773)):
#0  0x00007f5d938ad457 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5d938ae346 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x7f5ce40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7f5ce8c3bc90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f5d9882df64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f5d9b7e5fc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x1b5bc60) at thread/qthread_unix.cpp:368
#8  0x00007f5d976d86ba in start_thread (arg=0x7f5ce8c3c700) at pthread_create.c:333
#9  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f5d7a5a9700 (LWP 2627)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f5d9d24a6f4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f5d9d24a739 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f5d976d86ba in start_thread (arg=0x7f5d7a5a9700) at pthread_create.c:333
#4  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f5d7bfff700 (LWP 2389)):
#0  0x00007f5d938f2a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5d938ad929 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5d938ae2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x7f5d700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7f5d7bffece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f5d9882df64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007f5d9ae5ebf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x13498d0) at thread/qthread_unix.cpp:368
#9  0x00007f5d976d86ba in start_thread (arg=0x7f5d7bfff700) at pthread_create.c:333
#10 0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f5d823b0700 (LWP 2346)):
#0  0x00007f5d9812f69d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d938f16f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5d938ade74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d938ae330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x7f5d740008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7f5d823afce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f5d9882df64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007f5d9ae5ebf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x13211b0) at thread/qthread_unix.cpp:368
#10 0x00007f5d976d86ba in start_thread (arg=0x7f5d823b0700) at pthread_create.c:333
#11 0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f5d83df5700 (LWP 2286)):
#0  0x00007f5d98133b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d938ae38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x7f5d7c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7f5d83df4cd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f5d9882df64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007f5d9d92d735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x7f5d9d9a1d60) at thread/qthread_unix.cpp:368
#8  0x00007f5d976d86ba in start_thread (arg=0x7f5d83df5700) at pthread_create.c:333
#9  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f5d89b9a700 (LWP 2241)):
#0  0x00007f5d98133b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f5d9c1abc62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5d9c1ad8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5d8c312d79 in QXcbEventReader::run (this=0x12477d0) at qxcbconnection.cpp:1343
#4  0x00007f5d98832b48 in QThreadPrivate::start (arg=0x12477d0) at thread/qthread_unix.cpp:368
#5  0x00007f5d976d86ba in start_thread (arg=0x7f5d89b9a700) at pthread_create.c:333
#6  0x00007f5d9813f82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f5d9d7f58c0 (LWP 2229)):
[KCrash Handler]
#6  QSortFilterProxyModelPrivate::updateChildrenMapping (this=this@entry=0x2364300, source_parent=..., parent_mapping=parent_mapping@entry=0x3f28c00, start=start@entry=0, end=end@entry=0, delta_item_count=delta_item_count@entry=1, remove=true, orient=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:975
#7  0x00007f5d989c69e9 in QSortFilterProxyModelPrivate::source_items_removed (orient=Qt::Vertical, end=<optimized out>, start=0, source_parent=..., this=0x2364300) at itemmodels/qsortfilterproxymodel.cpp:917
#8  QSortFilterProxyModelPrivate::_q_sourceRowsRemoved (this=0x2364300, source_parent=..., start=0, end=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1424
#9  0x00007f5d989cee39 in QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:211
#10 0x00007f5d98a2ae89 in QMetaObject::activate (sender=sender@entry=0x237d780, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7fff8e602550) at kernel/qobject.cpp:3740
#11 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x237d780, m=m@entry=0x7f5d98c44d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7fff8e602550) at kernel/qobject.cpp:3602
#12 0x00007f5d98aa0d84 in QAbstractItemModel::rowsRemoved (this=this@entry=0x237d780, _t1=..., _t2=0, _t3=0) at .moc/moc_qabstractitemmodel.cpp:615
#13 0x00007f5d989a7dbb in QAbstractItemModel::endRemoveRows (this=0x237d780) at itemmodels/qabstractitemmodel.cpp:2715
#14 0x00007f5cce9ed4cd in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved (this=0x2365410, first=<optimized out>, last=3, parent=...) at /workspace/build/libtaskmanager/taskgroupingproxymodel.cpp:197
#15 0x00007f5cce9f0519 in TaskManager::TaskGroupingProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/libtaskmanager/moc_taskgroupingproxymodel.cpp:152
#16 0x00007f5d98a2ae89 in QMetaObject::activate (sender=sender@entry=0x237d7b0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602850) at kernel/qobject.cpp:3740
#17 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x237d7b0, m=m@entry=0x7f5d98c44d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602850) at kernel/qobject.cpp:3602
#18 0x00007f5d98aa0d14 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x237d7b0, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#19 0x00007f5d989a7663 in QAbstractItemModel::beginRemoveRows (this=0x237d7b0, parent=..., first=3, last=3) at itemmodels/qabstractitemmodel.cpp:2698
#20 0x00007f5d989cc63d in QSortFilterProxyModelPrivate::remove_proxy_interval (emit_signal=true, orient=Qt::Vertical, proxy_parent=..., proxy_end=3, proxy_start=3, proxy_to_source=..., source_to_proxy=..., this=0x23679b0) at itemmodels/qsortfilterproxymodel.cpp:583
#21 QSortFilterProxyModelPrivate::remove_source_items (this=this@entry=0x23679b0, source_to_proxy=..., proxy_to_source=..., source_items=..., source_parent=..., orient=orient@entry=Qt::Vertical, emit_signal=true) at itemmodels/qsortfilterproxymodel.cpp:565
#22 0x00007f5d989cc833 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed (this=0x23679b0, source_parent=..., start=3, end=3, orient=orient@entry=Qt::Vertical) at itemmodels/qsortfilterproxymodel.cpp:866
#23 0x00007f5d989cee18 in QSortFilterProxyModelPrivate::_q_sourceRowsAboutToBeRemoved (end=<optimized out>, start=<optimized out>, source_parent=..., this=<optimized out>) at itemmodels/qsortfilterproxymodel.cpp:1417
#24 QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:210
#25 0x00007f5d98a2ae89 in QMetaObject::activate (sender=sender@entry=0x2364ad0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602ba0) at kernel/qobject.cpp:3740
#26 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x2364ad0, m=m@entry=0x7f5d98c44d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602ba0) at kernel/qobject.cpp:3602
#27 0x00007f5d98aa0d14 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x2364ad0, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#28 0x00007f5d989a7663 in QAbstractItemModel::beginRemoveRows (this=0x2364ad0, parent=..., first=3, last=3) at itemmodels/qabstractitemmodel.cpp:2698
#29 0x00007f5cd9919de5 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved (this=0x2375dd0, start=3, end=3) at /workspace/build/src/kconcatenaterowsproxymodel.cpp:241
#30 0x00007f5cd991b3c1 in KConcatenateRowsProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /workspace/build/obj-x86_64-linux-gnu/src/moc_kconcatenaterowsproxymodel.cpp:144
#31 0x00007f5d98a2ae89 in QMetaObject::activate (sender=sender@entry=0x2363a40, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602e00) at kernel/qobject.cpp:3740
#32 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x2363a40, m=m@entry=0x7f5d98c44d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e602e00) at kernel/qobject.cpp:3602
#33 0x00007f5d98aa0d14 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x2363a40, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#34 0x00007f5d989a7663 in QAbstractItemModel::beginRemoveRows (this=this@entry=0x2363a40, parent=..., first=first@entry=3, last=last@entry=3) at itemmodels/qabstractitemmodel.cpp:2698
#35 0x00007f5d989c1c20 in QIdentityProxyModelPrivate::_q_sourceRowsAboutToBeRemoved (end=3, start=3, parent=..., this=<optimized out>) at itemmodels/qidentityproxymodel.cpp:580
#36 QIdentityProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qidentityproxymodel.cpp:150
#37 0x00007f5d98a2ae89 in QMetaObject::activate (sender=sender@entry=0x22c8510, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e603020) at kernel/qobject.cpp:3740
#38 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x22c8510, m=m@entry=0x7f5d98c44d80 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=11, argv=argv@entry=0x7fff8e603020) at kernel/qobject.cpp:3602
#39 0x00007f5d98aa0d14 in QAbstractItemModel::rowsAboutToBeRemoved (this=this@entry=0x22c8510, _t1=..., _t2=_t2@entry=3, _t3=_t3@entry=3) at .moc/moc_qabstractitemmodel.cpp:608
#40 0x00007f5d989a7663 in QAbstractItemModel::beginRemoveRows (this=0x22c8510, parent=..., first=first@entry=3, last=last@entry=3) at itemmodels/qabstractitemmodel.cpp:2698
#41 0x00007f5ccea075e8 in TaskManager::XWindowTasksModel::Private::removeWindow (this=0x22c8740, window=109051909) at /workspace/build/libtaskmanager/xwindowtasksmodel.cpp:251
#42 0x00007f5d98a2b1f6 in QtPrivate::QSlotObjectBase::call (a=0x7fff8e603270, r=0x22c8510, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:101
#43 QMetaObject::activate (sender=sender@entry=0x7f5d9ab98c20 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff8e603270) at kernel/qobject.cpp:3723
#44 0x00007f5d98a2b837 in QMetaObject::activate (sender=sender@entry=0x7f5d9ab98c20 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, m=m@entry=0x7f5d9ab97b60 <KWindowSystem::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff8e603270) at kernel/qobject.cpp:3602
#45 0x00007f5d9a989c52 in KWindowSystem::windowRemoved (this=this@entry=0x7f5d9ab98c20 <(anonymous namespace)::Q_QGS_g_kwmInstanceContainer::innerFunction()::holder>, _t1=_t1@entry=109051909) at /workspace/build/obj-x86_64-linux-gnu/src/moc_kwindowsystem.cpp:311
#46 0x00007f5d827d0232 in NETEventFilter::removeClient (this=0x1aa3bd0, w=109051909) at /workspace/build/src/platforms/xcb/kwindowsystem.cpp:382
#47 0x00007f5d9a982170 in NETRootInfo::update (this=0x1aa3bd0, properties=..., properties@entry=..., properties2=..., properties2@entry=...) at /workspace/build/src/platforms/xcb/netwm.cpp:2046
#48 0x00007f5d9a982a44 in NETRootInfo::event (this=this@entry=0x1aa3bd0, event=event@entry=0x7f5d840117c0, properties=properties@entry=0x7fff8e603830, properties2=properties2@entry=0x7fff8e603840) at /workspace/build/src/platforms/xcb/netwm.cpp:1887
#49 0x00007f5d9a982d62 in NETRootInfo::event (this=this@entry=0x1aa3bd0, ev=ev@entry=0x7f5d840117c0, properties=properties@entry=0x7fff8e6038e0, properties_size=properties_size@entry=5) at /workspace/build/src/platforms/xcb/netwm.cpp:1672
#50 0x00007f5d827cf976 in NETEventFilter::nativeEventFilter (this=0x1aa3bd0, ev=0x7f5d840117c0) at /workspace/build/src/platforms/xcb/kwindowsystem.cpp:237
#51 0x00007f5d989fd22f in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7f5d840117c0, result=result@entry=0x7fff8e6039a8) at kernel/qabstracteventdispatcher.cpp:466
#52 0x00007f5d8c3169c4 in QXcbConnection::handleXcbEvent (this=this@entry=0x1220fc0, event=event@entry=0x7f5d840117c0) at qxcbconnection.cpp:1106
#53 0x00007f5d8c317690 in QXcbConnection::processXcbEvents (this=0x1220fc0) at qxcbconnection.cpp:1741
#54 0x00007f5d98a2bd99 in QObject::event (this=0x1220fc0, e=<optimized out>) at kernel/qobject.cpp:1263
#55 0x00007f5d992deecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x1220fc0, e=0x7f5d8400e500) at kernel/qapplication.cpp:3799
#56 0x00007f5d992e68c6 in QApplication::notify (this=0x7fff8e604150, receiver=0x1220fc0, e=0x7f5d8400e500) at kernel/qapplication.cpp:3556
#57 0x00007f5d98a000c8 in QCoreApplication::notifyInternal2 (receiver=0x1220fc0, event=event@entry=0x7f5d8400e500) at kernel/qcoreapplication.cpp:988
#58 0x00007f5d98a0278b in QCoreApplication::sendEvent (event=0x7f5d8400e500, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#59 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1221880) at kernel/qcoreapplication.cpp:1649
#60 0x00007f5d98a02bf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#61 0x00007f5d98a53333 in postEventSourceDispatch (s=0x126fdd0) at kernel/qeventdispatcher_glib.cpp:276
#62 0x00007f5d938ae197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#63 0x00007f5d938ae3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#64 0x00007f5d938ae49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#65 0x00007f5d98a5375b in QEventDispatcherGlib::processEvents (this=0x128b940, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#66 0x00007f5d989fe0ba in QEventLoop::exec (this=this@entry=0x7fff8e603fe0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#67 0x00007f5d98a066cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#68 0x00007f5d98d3b24c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1633
#69 0x00007f5d992dee25 in QApplication::exec () at kernel/qapplication.cpp:2975
#70 0x000000000041cb08 in main (argc=1, argv=<optimized out>) at /workspace/build/shell/main.cpp:166

Possible duplicates by query: bug 378635, bug 378516, bug 378380, bug 378052, bug 375589.

Reported using DrKonqi
Comment 1 Nick 2017-05-05 11:39:20 UTC 
"I have started some of my apps from the top panel."

It crashes when I start VirtualBox.
Comment 2 Christoph Feck 2017-05-07 11:33:11 UTC 

*** This bug has been marked as a duplicate of bug 378635 ***