Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
Two versions of Ark were active, they were grouped by the task icon. I right clicked on the group and selected close. The system tray crashed and plasma followed, or from what I could tell. All other active applications like Virtual box etc stayed active until Plasma restarted.

The crash does not seem to be reproducible.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff47a51b7c0 (LWP 31747))]

Thread 8 (Thread 0x7ff4560d6700 (LWP 31748)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007ff4560d59f0 in ?? ()
#2  0x00007fff783ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 7 (Thread 0x7ff4548c1700 (LWP 31749)):
#0  0x00007ff479df8773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ff46e382f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff46e383429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff476fe9f3e in QEventDispatcherGlib::processEvents (this=0x7ff450000a70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ff476fbdcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ff476fbdef7 in QEventLoop::exec (this=0x7ff4548c0cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007ff476ed527f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007ff476fa0cbf in QInotifyFileSystemWatcherEngine::run (this=0x2faa4b0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007ff476ed7d05 in QThreadPrivate::start (arg=0x2faa4b0) at thread/qthread_unix.cpp:331
#9  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007ff46ee8fefc in start_thread (arg=0x7ff4548c1700) at pthread_create.c:304
#11 0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7ff449cb2700 (LWP 31757)):
#0  0x00007ff479e12ac0 in pthread_mutex_unlock (mutex=0x3b96c08) at forward.c:184
#1  0x00007ff46e382900 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff46e383258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff46e383792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff44a790516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007ff46e3a82b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#7  0x00007ff46ee8fefc in start_thread (arg=0x7ff449cb2700) at pthread_create.c:304
#8  0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7ff448efb700 (LWP 18193)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff476ed81ab in wait (time=18446744073709551615, this=0x2e0ce00) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2df4050, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff472cd2864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2ead500, th=0x33664d0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff472cd4e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2de8550, th=0x33664d0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff472cd3ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff448efad20, parent=0x2ead500, th=0x33664d0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff472cd3d5b in ThreadWeaver::Thread::run (this=0x33664d0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff476ed7d05 in QThreadPrivate::start (arg=0x33664d0) at thread/qthread_unix.cpp:331
#8  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007ff46ee8fefc in start_thread (arg=0x7ff448efb700) at pthread_create.c:304
#10 0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7ff44c4e2700 (LWP 18194)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff476ed81ab in wait (time=18446744073709551615, this=0x2e0ce00) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2df4050, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff472cd2864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2ead500, th=0x3f6ef30) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff472cd4e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2de8550, th=0x3f6ef30) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff472cd3ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff44c4e1d20, parent=0x2ead500, th=0x3f6ef30) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff472cd3d5b in ThreadWeaver::Thread::run (this=0x3f6ef30) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff476ed7d05 in QThreadPrivate::start (arg=0x3f6ef30) at thread/qthread_unix.cpp:331
#8  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007ff46ee8fefc in start_thread (arg=0x7ff44c4e2700) at pthread_create.c:304
#10 0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7ff44a4b3700 (LWP 18195)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff476ed81ab in wait (time=18446744073709551615, this=0x2e0ce00) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2df4050, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff472cd2864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2ead500, th=0x47b0a10) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff472cd4e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2de8550, th=0x47b0a10) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff472cd3ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff44a4b2d20, parent=0x2ead500, th=0x47b0a10) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff472cd3d5b in ThreadWeaver::Thread::run (this=0x47b0a10) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff476ed7d05 in QThreadPrivate::start (arg=0x47b0a10) at thread/qthread_unix.cpp:331
#8  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007ff46ee8fefc in start_thread (arg=0x7ff44a4b3700) at pthread_create.c:304
#10 0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7ff446a96700 (LWP 18196)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff476ed81ab in wait (time=18446744073709551615, this=0x2e0ce00) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2df4050, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff472cd2864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2ead500, th=0x3617e60) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff472cd4e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2de8550, th=0x3617e60) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff472cd3ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff446a95d20, parent=0x2ead500, th=0x3617e60) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff472cd3d5b in ThreadWeaver::Thread::run (this=0x3617e60) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff476ed7d05 in QThreadPrivate::start (arg=0x3617e60) at thread/qthread_unix.cpp:331
#8  0x00007ff46b69c56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#9  0x00007ff46ee8fefc in start_thread (arg=0x7ff446a96700) at pthread_create.c:304
#10 0x00007ff479e0489d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff47a51b7c0 (LWP 31747)):
[KCrash Handler]
#6  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x6465030) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007ff45eeea112 in WindowTaskItem::publishIconGeometry (this=0x75721c0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007ff45eef8b7c in AbstractTaskItem::timerEvent (this=0x75721c0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007ff476fd5789 in QObject::event (this=0x75721c0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007ff47698d89b in QGraphicsWidget::event (this=0x75721c0, event=0x7fff783693d0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007ff47636f424 in notify_helper (e=0x7fff783693d0, receiver=0x75721c0, this=0x2348190) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x2348190, receiver=0x75721c0, e=0x7fff783693d0) at kernel/qapplication.cpp:4458
#15 0x00007ff476374291 in QApplication::notify (this=0x23389f0, receiver=0x75721c0, e=0x7fff783693d0) at kernel/qapplication.cpp:4365
#16 0x00007ff477c6d126 in KApplication::notify (this=0x23389f0, receiver=0x75721c0, event=0x7fff783693d0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007ff476fbeafc in QCoreApplication::notifyInternal (this=0x23389f0, receiver=0x75721c0, event=0x7fff783693d0) at kernel/qcoreapplication.cpp:787
#18 0x00007ff476febd62 in sendEvent (event=0x7fff783693d0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x234e160) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007ff476fe9514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007ff46e382a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007ff46e383258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ff46e383429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ff476fe9ed6 in QEventDispatcherGlib::processEvents (this=0x2297f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007ff47641707e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007ff476fbdcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007ff476fbdef7 in QEventLoop::exec (this=0x7fff78369660, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007ff476fc2789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007ff47a1031a3 in kdemain (argc=1, argv=0x7fff78369a48) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007ff479d4430d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff78369a48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff78369a38) at libc-start.c:226
#31 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290741, bug 290713, bug 290700, bug 290686, bug 290685.

Reported using DrKonqi