Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.3 (4.8.3)
Qt Version: 4.8.1
Operating System: Linux 3.3.4-5.fc17.x86_64 x86_64
Distribution (Platform): Fedora RPMs

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

Crash when removing widget 'system tray' in panel 

- Custom settings of the application:

Don't know if could be a problem but i have dropbox in 'system tray'

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7ff425518880 (LWP 4411))]

Thread 7 (Thread 0x7ff413616700 (LWP 4412)):
#0  0x00000035b8ce8eef in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00000035bac47984 in g_main_context_poll (n_fds=1, fds=0x7ff40c002c00, timeout=-1, context=0x7ff40c0009a0, priority=<optimized out>) at gmain.c:3417
#2  g_main_context_iterate (context=context@entry=0x7ff40c0009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3118
#3  0x00000035bac47aa4 in g_main_context_iteration (context=0x7ff40c0009a0, may_block=1) at gmain.c:3184
#4  0x00000035c15a39e6 in QEventDispatcherGlib::processEvents (this=0x7ff40c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00000035c157493f in QEventLoop::processEvents (this=this@entry=0x7ff413615cf0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00000035c1574bc8 in QEventLoop::exec (this=0x7ff413615cf0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00000035c14785a0 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00000035c15553bf in QInotifyFileSystemWatcherEngine::run (this=0x2915010) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00000035c147b53b in QThreadPrivate::start (arg=0x2915010) at thread/qthread_unix.cpp:298
#10 0x00000035b9007d14 in start_thread (arg=0x7ff413616700) at pthread_create.c:309
#11 0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 6 (Thread 0x7ff409242700 (LWP 4415)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x00000035db984ac7 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x35dbc919a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00000035db984af9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00000035b9007d14 in start_thread (arg=0x7ff409242700) at pthread_create.c:309
#4  0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 5 (Thread 0x7ff3fbfff700 (LWP 6446)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x00000035c147ba3b in wait (time=18446744073709551615, this=0x29aeac0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x29a7800, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000035d500aa81 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2984830, th=0x3e019f0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00000035d500d2cb in ThreadWeaver::WorkingHardState::applyForWork (this=0x29a46c0, th=0x3e019f0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00000035d500c13f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7ff3fbffed20, parent=0x2984830, th=th@entry=0x3e019f0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:87
#6  0x00000035d500c1cb in ThreadWeaver::Thread::run (this=0x3e019f0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:142
#7  0x00000035c147b53b in QThreadPrivate::start (arg=0x3e019f0) at thread/qthread_unix.cpp:298
#8  0x00000035b9007d14 in start_thread (arg=0x7ff3fbfff700) at pthread_create.c:309
#9  0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 4 (Thread 0x7ff400bd7700 (LWP 6447)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x00000035c147ba3b in wait (time=18446744073709551615, this=0x29aeac0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x29a7800, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000035d500aa81 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2984830, th=0x36803a0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00000035d500d2cb in ThreadWeaver::WorkingHardState::applyForWork (this=0x29a46c0, th=0x36803a0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00000035d500c13f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7ff400bd6d20, parent=0x2984830, th=th@entry=0x36803a0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:87
#6  0x00000035d500c1cb in ThreadWeaver::Thread::run (this=0x36803a0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:142
#7  0x00000035c147b53b in QThreadPrivate::start (arg=0x36803a0) at thread/qthread_unix.cpp:298
#8  0x00000035b9007d14 in start_thread (arg=0x7ff400bd7700) at pthread_create.c:309
#9  0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 3 (Thread 0x7ff3efe9f700 (LWP 6448)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x00000035c147ba3b in wait (time=18446744073709551615, this=0x29aeac0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x29a7800, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000035d500aa81 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2984830, th=0x3e12650) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00000035d500d2cb in ThreadWeaver::WorkingHardState::applyForWork (this=0x29a46c0, th=0x3e12650) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00000035d500d2e4 in ThreadWeaver::WorkingHardState::applyForWork (this=0x29a46c0, th=0x3e12650) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00000035d500c13f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7ff3efe9ed20, parent=0x2984830, th=th@entry=0x3e12650) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:87
#7  0x00000035d500c1cb in ThreadWeaver::Thread::run (this=0x3e12650) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:142
#8  0x00000035c147b53b in QThreadPrivate::start (arg=0x3e12650) at thread/qthread_unix.cpp:298
#9  0x00000035b9007d14 in start_thread (arg=0x7ff3efe9f700) at pthread_create.c:309
#10 0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7ff3ef69e700 (LWP 6449)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
#1  0x00000035c147ba3b in wait (time=18446744073709551615, this=0x29aeac0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x29a7800, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00000035d500aa81 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2984830, th=0x36a48c0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00000035d500d2cb in ThreadWeaver::WorkingHardState::applyForWork (this=0x29a46c0, th=0x36a48c0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00000035d500c13f in ThreadWeaver::ThreadRunHelper::run (this=this@entry=0x7ff3ef69dd20, parent=0x2984830, th=th@entry=0x36a48c0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:87
#6  0x00000035d500c1cb in ThreadWeaver::Thread::run (this=0x36a48c0) at /usr/src/debug/kdelibs-4.8.3/threadweaver/Weaver/Thread.cpp:142
#7  0x00000035c147b53b in QThreadPrivate::start (arg=0x36a48c0) at thread/qthread_unix.cpp:298
#8  0x00000035b9007d14 in start_thread (arg=0x7ff3ef69e700) at pthread_create.c:309
#9  0x00000035b8cf199d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7ff425518880 (LWP 4411)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00000035c158e96a in QObject::connect (sender=0x42592b0, signal=0x7ff411af5ac9 "2destroyed()", receiver=0x5d68e00, method=0x7ff411af5ab8 "1widgetDeleted()", type=Qt::AutoConnection) at kernel/qobject.cpp:2551
#8  0x00007ff411ad8838 in SystemTray::Task::widget (this=0x5d68e00, host=0x5c66020, createIfNecessary=<optimized out>) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/core/task.cpp:83
#9  0x00007ff411af2906 in SystemTray::TaskArea::addWidgetForTask (this=this@entry=0x46f4d90, task=0x5d68e00) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/ui/taskarea.cpp:265
#10 0x00007ff411af2ca6 in SystemTray::TaskArea::addTask (this=0x46f4d90, task=<optimized out>) at /usr/src/debug/kde-workspace-4.8.3/plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#11 0x00000035c158c07f in QMetaObject::activate (sender=0x2a79890, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffa4bb59b0) at kernel/qobject.cpp:3547
#12 0x00007ff411ad7a12 in SystemTray::Manager::taskChanged (this=<optimized out>, _t1=0x5d68e00) at /usr/src/debug/kde-workspace-4.8.3/x86_64-redhat-linux-gnu/plasma/generic/applets/systemtray/manager.moc:119
#13 0x00000035c158c07f in QMetaObject::activate (sender=0x5d68e00, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffa4bb5b00) at kernel/qobject.cpp:3547
#14 0x00007ff411ad858f in SystemTray::Task::changed (this=<optimized out>, _t1=0x5d68e00) at /usr/src/debug/kde-workspace-4.8.3/x86_64-redhat-linux-gnu/plasma/generic/applets/systemtray/task.moc:127
#15 0x00000035c158a1ce in QObject::event (this=0x5d68e00, e=<optimized out>) at kernel/qobject.cpp:1195
#16 0x00000035c61ca47c in QApplicationPrivate::notify_helper (this=this@entry=0x24be960, receiver=receiver@entry=0x5d68e00, e=e@entry=0x5d45c80) at kernel/qapplication.cpp:4554
#17 0x00000035c61ce9aa in QApplication::notify (this=0x24a82e0, receiver=0x5d68e00, e=0x5d45c80) at kernel/qapplication.cpp:4415
#18 0x00000035c8045a56 in KApplication::notify (this=0x24a82e0, receiver=0x5d68e00, event=0x5d45c80) at /usr/src/debug/kdelibs-4.8.3/kdeui/kernel/kapplication.cpp:311
#19 0x00000035c157593e in QCoreApplication::notifyInternal (this=0x24a82e0, receiver=receiver@entry=0x5d68e00, event=event@entry=0x5d45c80) at kernel/qcoreapplication.cpp:876
#20 0x00000035c15793e1 in sendEvent (event=0x5d45c80, receiver=0x5d68e00) at kernel/qcoreapplication.h:231
#21 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x245a6e0) at kernel/qcoreapplication.cpp:1500
#22 0x00000035c15a3833 in sendPostedEvents () at kernel/qcoreapplication.h:236
#23 postEventSourceDispatch (s=s@entry=0x24bfb10) at kernel/qeventdispatcher_glib.cpp:279
#24 0x00000035bac475cc in g_main_dispatch (context=0x24c1c70) at gmain.c:2515
#25 g_main_context_dispatch (context=context@entry=0x24c1c70) at gmain.c:3052
#26 0x00000035bac479e8 in g_main_context_iterate (context=context@entry=0x24c1c70, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at gmain.c:3123
#27 0x00000035bac47aa4 in g_main_context_iteration (context=0x24c1c70, may_block=1) at gmain.c:3184
#28 0x00000035c15a39c6 in QEventDispatcherGlib::processEvents (this=0x245bba0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#29 0x00000035c626a3ee in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#30 0x00000035c157493f in QEventLoop::processEvents (this=this@entry=0x7fffa4bb6400, flags=...) at kernel/qeventloop.cpp:149
#31 0x00000035c1574bc8 in QEventLoop::exec (this=0x7fffa4bb6400, flags=...) at kernel/qeventloop.cpp:204
#32 0x00000035c15796f8 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#33 0x00000035d4641105 in kdemain (argc=1, argv=0x7fffa4bb66f8) at /usr/src/debug/kde-workspace-4.8.3/plasma/desktop/shell/main.cpp:120
#34 0x00000035b8c21735 in __libc_start_main (main=0x4008b0 <main(int, char**)>, argc=1, ubp_av=0x7fffa4bb66f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffa4bb66e8) at libc-start.c:226
#35 0x00000000004008e1 in _start ()

Possible duplicates by query: bug 309177, bug 306586, bug 306117, bug 305012, bug 304637.

Reported using DrKonqi