Bug 361104

Application: plasmashell (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-15-generic x86_64
Distribution: Ubuntu Xenial Xerus (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I have Thunderbird shortcut in my task manager.
I started it on virtual desktop 2.
While I was on virtual desktop 1 I clicked on that shortcut and desktop switched to 2-nd to Thunderbird.
Then I immediately clicked on 1-st desktop in task manager.
Desktop had swithed but task manager freezes for about 1 second and crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f223f1798c0 (LWP 31722))]

Thread 12 (Thread 0x7f222a38d700 (LWP 31725)):
#0  0x00007f22398835ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f223d94ac62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f223d94c8d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f222c4d74a9 in QXcbEventReader::run (this=0xca96a0) at qxcbconnection.cpp:1253
#4  0x00007f2239f797fe in QThreadPrivate::start (arg=0xca96a0) at thread/qthread_unix.cpp:331
#5  0x00007f22390656fa in start_thread (arg=0x7f222a38d700) at pthread_create.c:333
#6  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 11 (Thread 0x7f22239d9700 (LWP 31727)):
#0  0x00007f2236615385 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2236617c7a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22366182c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f223a1b0a6b in QEventDispatcherGlib::processEvents (this=0x7f221c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7f22239d8ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2239f74854 in QThread::exec (this=this@entry=0xd755a0) at thread/qthread.cpp:503
#7  0x00007f223c81dba5 in QQmlThreadPrivate::run (this=0xd755a0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f2239f797fe in QThreadPrivate::start (arg=0xd755a0) at thread/qthread_unix.cpp:331
#9  0x00007f22390656fa in start_thread (arg=0x7f22239d9700) at pthread_create.c:333
#10 0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 10 (Thread 0x7f2218fb6700 (LWP 31728)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f22210a82f3 in cnd_wait (mtx=0xf382b0, cond=0xf382d8) at ../../../../../../include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0xf382b0) at ../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0xf38208) at ../../../../../../src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f22210a8237 in impl_thrd_routine (p=<optimized out>) at ../../../../../../include/c11/threads_posix.h:87
#5  0x00007f22390656fa in start_thread (arg=0x7f2218fb6700) at pthread_create.c:333
#6  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f22187b5700 (LWP 31729)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f22210a82f3 in cnd_wait (mtx=0xf38418, cond=0xf38440) at ../../../../../../include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0xf38418) at ../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0xf38370) at ../../../../../../src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f22210a8237 in impl_thrd_routine (p=<optimized out>) at ../../../../../../include/c11/threads_posix.h:87
#5  0x00007f22390656fa in start_thread (arg=0x7f22187b5700) at pthread_create.c:333
#6  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f2217fb4700 (LWP 31730)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f22210a82f3 in cnd_wait (mtx=0xf38580, cond=0xf385a8) at ../../../../../../include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0xf38580) at ../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0xf384d8) at ../../../../../../src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f22210a8237 in impl_thrd_routine (p=<optimized out>) at ../../../../../../include/c11/threads_posix.h:87
#5  0x00007f22390656fa in start_thread (arg=0x7f2217fb4700) at pthread_create.c:333
#6  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f22177b3700 (LWP 31731)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f22210a82f3 in cnd_wait (mtx=0xf386e8, cond=0xf38710) at ../../../../../../include/c11/threads_posix.h:159
#2  pipe_semaphore_wait (sema=0xf386e8) at ../../../../../../src/gallium/auxiliary/os/os_thread.h:259
#3  thread_function (init_data=init_data@entry=0xf38640) at ../../../../../../src/gallium/drivers/llvmpipe/lp_rast.c:805
#4  0x00007f22210a8237 in impl_thrd_routine (p=<optimized out>) at ../../../../../../include/c11/threads_posix.h:87
#5  0x00007f22390656fa in start_thread (arg=0x7f22177b3700) at pthread_create.c:333
#6  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f2212f7f700 (LWP 31736)):
#0  0x00007f22398835ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f223661831c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f223a1b0a6b in QEventDispatcherGlib::processEvents (this=0x7f220c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7f2212f7ece0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2239f74854 in QThread::exec (this=this@entry=0x102a840) at thread/qthread.cpp:503
#6  0x00007f223c81dba5 in QQmlThreadPrivate::run (this=0x102a840) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f2239f797fe in QThreadPrivate::start (arg=0x102a840) at thread/qthread_unix.cpp:331
#8  0x00007f22390656fa in start_thread (arg=0x7f2212f7f700) at pthread_create.c:333
#9  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f2211193700 (LWP 31737)):
#0  0x00007f2236615420 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2236617cd2 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22366182c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f223a1b0a6b in QEventDispatcherGlib::processEvents (this=0x7f22040008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7f2211192ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2239f74854 in QThread::exec (this=this@entry=0x10cdc70) at thread/qthread.cpp:503
#7  0x00007f223c81dba5 in QQmlThreadPrivate::run (this=0x10cdc70) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f2239f797fe in QThreadPrivate::start (arg=0x10cdc70) at thread/qthread_unix.cpp:331
#9  0x00007f22390656fa in start_thread (arg=0x7f2211193700) at pthread_create.c:333
#10 0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f220b7bc700 (LWP 31738)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f223ebc3bd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007f223ebc3c19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007f22390656fa in start_thread (arg=0x7f220b7bc700) at pthread_create.c:333
#4  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f2208e4a700 (LWP 31739)):
#0  0x00007f22398835ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f223661831c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f223a1b0a6b in QEventDispatcherGlib::processEvents (this=0x7f21800008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7f2208e49c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f2239f74854 in QThread::exec (this=this@entry=0x13196e0) at thread/qthread.cpp:503
#6  0x00007f223d1a4ef6 in QQuickPixmapReader::run (this=0x13196e0) at util/qquickpixmapcache.cpp:817
#7  0x00007f2239f797fe in QThreadPrivate::start (arg=0x13196e0) at thread/qthread_unix.cpp:331
#8  0x00007f22390656fa in start_thread (arg=0x7f2208e4a700) at pthread_create.c:333
#9  0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f2174ffe700 (LWP 31747)):
#0  0x00007f223665ca29 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f2236617bce in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f22366182c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f223a1b0a6b in QEventDispatcherGlib::processEvents (this=0x7f21700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7f2174ffdcc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f2239f74854 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#7  0x00007f21774de7d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f2239f797fe in QThreadPrivate::start (arg=0x2406f20) at thread/qthread_unix.cpp:331
#9  0x00007f22390656fa in start_thread (arg=0x7f2174ffe700) at pthread_create.c:333
#10 0x00007f223988f2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f223f1798c0 (LWP 31722)):
[KCrash Handler]
#6  0x00007f22397bd518 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007f22397bf0ea in __GI_abort () at abort.c:89
#8  0x00007f2239be185d in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#9  0x00007f2239bdf6d6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00007f2239bdf721 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#11 0x00007f2239bdf989 in __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00007f223a1079b9 in QVector<QAbstractItemModelPrivate::Change>::reallocData (this=this@entry=0x1b8f0f0, asize=-1, aalloc=<optimized out>, options=...) at ../../include/QtCore/../../src/corelib/tools/qvector.h:546
#13 0x00007f223a10283a in QVector<QAbstractItemModelPrivate::Change>::resize (asize=<optimized out>, this=0x1b8f0f0) at ../../include/QtCore/../../src/corelib/tools/qvector.h:386
#14 QStack<QAbstractItemModelPrivate::Change>::pop (this=0x1b8f0f0) at ../../include/QtCore/../../src/corelib/tools/qstack.h:58
#15 QAbstractItemModel::endRemoveRows (this=0x19eb250) at itemmodels/qabstractitemmodel.cpp:2671
#16 0x00007f217a824a1c in TaskManager::TasksModelPrivate::itemRemoved (item=<optimized out>, this=<optimized out>) at ../../libtaskmanager/tasksmodel.cpp:484
#17 TaskManager::TasksModel::qt_static_metacall (_o=_o@entry=0x19eb250, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=6, _a=_a@entry=0x7ffd730343c0) at ./moc_tasksmodel.cpp:211
#18 0x00007f223a188f9a in QMetaObject::activate (sender=0x1c04f20, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffd730343c0) at kernel/qobject.cpp:3713
#19 0x00007f223a1897a7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f217aa488e0 <TaskManager::TaskGroup::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffd730343c0) at kernel/qobject.cpp:3578
#20 0x00007f217a814d92 in TaskManager::TaskGroup::itemRemoved (this=<optimized out>, _t1=0x25c6d60) at ./moc_taskgroup.cpp:419
#21 0x00007f217a815cd0 in TaskManager::TaskGroup::Private::signalRemovals (this=0x1a005e0) at ../../libtaskmanager/taskgroup.cpp:271
#22 0x00007f217a817719 in TaskManager::TaskGroup::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./moc_taskgroup.cpp:214
#23 0x00007f223a189e71 in QObject::event (this=0x1c04f20, e=<optimized out>) at kernel/qobject.cpp:1239
#24 0x00007f223ac5d05c in QApplicationPrivate::notify_helper (this=this@entry=0xc8e760, receiver=receiver@entry=0x1c04f20, e=e@entry=0x29207a0) at kernel/qapplication.cpp:3716
#25 0x00007f223ac62516 in QApplication::notify (this=0x7ffd73034b00, receiver=0x1c04f20, e=0x29207a0) at kernel/qapplication.cpp:3499
#26 0x00007f223a15a5bb in QCoreApplication::notifyInternal (this=0x7ffd73034b00, receiver=0x1c04f20, event=event@entry=0x29207a0) at kernel/qcoreapplication.cpp:965
#27 0x00007f223a15c9b6 in QCoreApplication::sendEvent (event=0x29207a0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xc84600) at kernel/qcoreapplication.cpp:1593
#29 0x00007f223a15ce98 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#30 0x00007f223a1b0643 in postEventSourceDispatch (s=0xcce560) at kernel/qeventdispatcher_glib.cpp:271
#31 0x00007f2236618127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f2236618380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f223661842c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f223a1b0a4f in QEventDispatcherGlib::processEvents (this=0xccf4d0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#35 0x00007f223a157d7a in QEventLoop::exec (this=this@entry=0x7ffd730349a0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#36 0x00007f223a15fe1c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#37 0x00007f223a493c3c in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#38 0x00007f223ac59495 in QApplication::exec () at kernel/qapplication.cpp:2976
#39 0x0000000000432d4a in main (argc=3, argv=<optimized out>) at ../../shell/main.cpp:181

Possible duplicates by query: bug 360867, bug 360761, bug 360716, bug 360618, bug 360584.

Reported using DrKonqi