Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

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

- Unusual behavior I noticed:

plasma crashes while working on thunderbird, dolphin, libreoffice, and sometimes, while closing these applications.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f6d406dd7a0 (LWP 2405))]

Thread 8 (Thread 0x7f6d1d566700 (LWP 2406)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f6d1d565ad0 in ?? ()
#2  0x00007fff397ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 7 (Thread 0x7f6d16c77700 (LWP 2407)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f6d16c76ad0 in ?? ()
#2  0x00007fff397ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 6 (Thread 0x7f6d11169700 (LWP 2415)):
#0  0x00007f6d35056034 in __pthread_mutex_lock (mutex=0x3947ba8) at pthread_mutex_lock.c:61
#1  0x00007f6d34545649 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6d34546d81 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d34547792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6d11c47516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007f6d3456c2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f6d35053efc in start_thread (arg=0x7f6d11169700) at pthread_create.c:304
#7  0x00007f6d3ffc889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f6d10505700 (LWP 4169)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f6d3d09c1ab in wait (time=18446744073709551615, this=0x2e5c550) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2e3b1d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6d38e96864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x31350a0, th=0x489f780) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6d38e98e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2e3b100, th=0x489f780) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6d38e97ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f6d10504e00, parent=0x31350a0, th=0x489f780) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6d38e97d5b in ThreadWeaver::Thread::run (this=0x489f780) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f6d3d09bd05 in QThreadPrivate::start (arg=0x489f780) at thread/qthread_unix.cpp:331
#8  0x00007f6d35053efc in start_thread (arg=0x7f6d10505700) at pthread_create.c:304
#9  0x00007f6d3ffc889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f6d13999700 (LWP 4170)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f6d3d09c1ab in wait (time=18446744073709551615, this=0x2e5c550) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2e3b1d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6d38e96864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x31350a0, th=0x3e200e0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6d38e98e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2e3b100, th=0x3e200e0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6d38e97ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f6d13998e00, parent=0x31350a0, th=0x3e200e0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6d38e97d5b in ThreadWeaver::Thread::run (this=0x3e200e0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f6d3d09bd05 in QThreadPrivate::start (arg=0x3e200e0) at thread/qthread_unix.cpp:331
#8  0x00007f6d35053efc in start_thread (arg=0x7f6d13999700) at pthread_create.c:304
#9  0x00007f6d3ffc889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f6d1196a700 (LWP 4171)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f6d3d09c1ab in wait (time=18446744073709551615, this=0x2e5c550) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2e3b1d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6d38e96864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x31350a0, th=0x48e2030) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6d38e98e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2e3b100, th=0x48e2030) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6d38e97ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f6d11969e00, parent=0x31350a0, th=0x48e2030) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6d38e97d5b in ThreadWeaver::Thread::run (this=0x48e2030) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f6d3d09bd05 in QThreadPrivate::start (arg=0x48e2030) at thread/qthread_unix.cpp:331
#8  0x00007f6d35053efc in start_thread (arg=0x7f6d1196a700) at pthread_create.c:304
#9  0x00007f6d3ffc889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6d0daef700 (LWP 4172)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f6d3d09c1ab in wait (time=18446744073709551615, this=0x2e5c550) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2e3b1d0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6d38e96864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x31350a0, th=0x22cce90) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6d38e98e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2e3b100, th=0x22cce90) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6d38e97ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f6d0daeee00, parent=0x31350a0, th=0x22cce90) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6d38e97d5b in ThreadWeaver::Thread::run (this=0x22cce90) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f6d3d09bd05 in QThreadPrivate::start (arg=0x22cce90) at thread/qthread_unix.cpp:331
#8  0x00007f6d35053efc in start_thread (arg=0x7f6d0daef700) at pthread_create.c:304
#9  0x00007f6d3ffc889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6d406dd7a0 (LWP 2405)):
[KCrash Handler]
#6  operator== (value=0, this=0x2a0000000d) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x22baef0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x22baef0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f6d2655f112 in WindowTaskItem::publishIconGeometry (this=0x4b29200) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f6d2656db7c in AbstractTaskItem::timerEvent (this=0x4b29200, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f6d3d199789 in QObject::event (this=0x4b29200, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f6d3cb5189b in QGraphicsWidget::event (this=0x4b29200, event=0x7fff397d6160) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f6d3c533424 in notify_helper (e=0x7fff397d6160, receiver=0x4b29200, this=0x2274e40) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x2274e40, receiver=0x4b29200, e=0x7fff397d6160) at kernel/qapplication.cpp:4458
#16 0x00007f6d3c538291 in QApplication::notify (this=0x225ccd0, receiver=0x4b29200, e=0x7fff397d6160) at kernel/qapplication.cpp:4365
#17 0x00007f6d3de31126 in KApplication::notify (this=0x225ccd0, receiver=0x4b29200, event=0x7fff397d6160) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f6d3d182afc in QCoreApplication::notifyInternal (this=0x225ccd0, receiver=0x4b29200, event=0x7fff397d6160) at kernel/qcoreapplication.cpp:787
#19 0x00007f6d3d1afd62 in sendEvent (event=0x7fff397d6160, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x2273a90) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f6d3d1ad538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f6d34546a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f6d34547258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f6d34547429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f6d3d1aded6 in QEventDispatcherGlib::processEvents (this=0x2204f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f6d3c5db07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f6d3d181cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f6d3d181ef7 in QEventLoop::exec (this=0x7fff397d63f0, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f6d3d186789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007f6d402c71a3 in kdemain (argc=1, argv=0x7fff397d67d8) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f6d3ff0830d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff397d67d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff397d67c8) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 288054, bug 287611, bug 287588, bug 287545, bug 287181.

Reported using DrKonqi