Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.1.0-030100-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
When right clicking on a taskbar window group of 50 windows, and then clicking close to close all windows, plasma desktop crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff138a8c7a0 (LWP 1641))]

Thread 8 (Thread 0x7ff1163d1700 (LWP 1642)):
#0  0x00007ff12c8e5f4a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ff12c8e6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff13554cf3e in QEventDispatcherGlib::processEvents (this=0x13e6a40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#3  0x00007ff135520cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#4  0x00007ff135520ef7 in QEventLoop::exec (this=0x7ff1163d0db0, flags=...) at kernel/qeventloop.cpp:201
#5  0x00007ff13543827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#6  0x00007ff135503cbf in QInotifyFileSystemWatcherEngine::run (this=0x13e53b0) at io/qfilesystemwatcher_inotify.cpp:248
#7  0x00007ff13543ad05 in QThreadPrivate::start (arg=0x13e53b0) at thread/qthread_unix.cpp:331
#8  0x00007ff12d3f2efc in start_thread (arg=0x7ff1163d1700) at pthread_create.c:304
#9  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7ff114982700 (LWP 1643)):
#0  0x00007ff13541c770 in pthread_getspecific@plt () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#1  0x00007ff13543a08c in get_thread_data () at thread/qthread_unix.cpp:172
#2  QThreadData::current () at thread/qthread_unix.cpp:210
#3  0x00007ff13554c6a9 in postEventSourcePrepare (s=0x7ff110001140, timeout=0x0) at kernel/qeventdispatcher_glib.cpp:254
#4  0x00007ff12c8e5734 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff12c8e5f82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ff12c8e6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007ff13554cf3e in QEventDispatcherGlib::processEvents (this=0x15f64a0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#8  0x00007ff135520cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#9  0x00007ff135520ef7 in QEventLoop::exec (this=0x7ff114981db0, flags=...) at kernel/qeventloop.cpp:201
#10 0x00007ff13543827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#11 0x00007ff135503cbf in QInotifyFileSystemWatcherEngine::run (this=0x15f5c70) at io/qfilesystemwatcher_inotify.cpp:248
#12 0x00007ff13543ad05 in QThreadPrivate::start (arg=0x15f5c70) at thread/qthread_unix.cpp:331
#13 0x00007ff12d3f2efc in start_thread (arg=0x7ff114982700) at pthread_create.c:304
#14 0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7ff109b73700 (LWP 1651)):
#0  0x00007ff12d3f503e in __pthread_mutex_lock (mutex=0x7ff1100141b8) at pthread_mutex_lock.c:62
#1  0x00007ff12c8e54ca in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff12c8e5f82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff12c8e6792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff10a651516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007ff12c90b2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ff12d3f2efc in start_thread (arg=0x7ff109b73700) at pthread_create.c:304
#7  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7ff1091b6700 (LWP 3011)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff13543b1ab in wait (time=18446744073709551615, this=0x14a36c0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x143ef40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff131235864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x14c90c0, th=0x1304d70) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff131237e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x143e990, th=0x1304d70) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff131236ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff1091b5e00, parent=0x14c90c0, th=0x1304d70) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff131236d5b in ThreadWeaver::Thread::run (this=0x1304d70) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff13543ad05 in QThreadPrivate::start (arg=0x1304d70) at thread/qthread_unix.cpp:331
#8  0x00007ff12d3f2efc in start_thread (arg=0x7ff1091b6700) at pthread_create.c:304
#9  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7ff10c3a3700 (LWP 3012)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff13543b1ab in wait (time=18446744073709551615, this=0x14a36c0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x143ef40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff131235864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x14c90c0, th=0x1f8c110) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff131237e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x143e990, th=0x1f8c110) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff131236ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff10c3a2e00, parent=0x14c90c0, th=0x1f8c110) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff131236d5b in ThreadWeaver::Thread::run (this=0x1f8c110) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff13543ad05 in QThreadPrivate::start (arg=0x1f8c110) at thread/qthread_unix.cpp:331
#8  0x00007ff12d3f2efc in start_thread (arg=0x7ff10c3a3700) at pthread_create.c:304
#9  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7ff10a374700 (LWP 3013)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff13543b1ab in wait (time=18446744073709551615, this=0x14a36c0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x143ef40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff131235864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x14c90c0, th=0x189d410) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff131237e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x143e990, th=0x189d410) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff131236ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff10a373e00, parent=0x14c90c0, th=0x189d410) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff131236d5b in ThreadWeaver::Thread::run (this=0x189d410) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff13543ad05 in QThreadPrivate::start (arg=0x189d410) at thread/qthread_unix.cpp:331
#8  0x00007ff12d3f2efc in start_thread (arg=0x7ff10a374700) at pthread_create.c:304
#9  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7ff1066aa700 (LWP 3014)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ff13543b1ab in wait (time=18446744073709551615, this=0x14a36c0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x143ef40, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ff131235864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x14c90c0, th=0x27fe230) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ff131237e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x143e990, th=0x27fe230) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ff131236ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ff1066a9e00, parent=0x14c90c0, th=0x27fe230) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ff131236d5b in ThreadWeaver::Thread::run (this=0x27fe230) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ff13543ad05 in QThreadPrivate::start (arg=0x27fe230) at thread/qthread_unix.cpp:331
#8  0x00007ff12d3f2efc in start_thread (arg=0x7ff1066aa700) at pthread_create.c:304
#9  0x00007ff13836789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff138a8c7a0 (LWP 1641)):
[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=0x1d443e0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007ff11ef32112 in WindowTaskItem::publishIconGeometry (this=0x2b56380) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007ff11ef40b7c in AbstractTaskItem::timerEvent (this=0x2b56380, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007ff135538789 in QObject::event (this=0x2b56380, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007ff134ef089b in QGraphicsWidget::event (this=0x2b56380, event=0x7fff3724bb90) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007ff1348d2424 in notify_helper (e=0x7fff3724bb90, receiver=0x2b56380, this=0xc2e4c0) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0xc2e4c0, receiver=0x2b56380, e=0x7fff3724bb90) at kernel/qapplication.cpp:4458
#15 0x00007ff1348d7291 in QApplication::notify (this=0xc1bdf0, receiver=0x2b56380, e=0x7fff3724bb90) at kernel/qapplication.cpp:4365
#16 0x00007ff1361d0126 in KApplication::notify (this=0xc1bdf0, receiver=0x2b56380, event=0x7fff3724bb90) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007ff135521afc in QCoreApplication::notifyInternal (this=0xc1bdf0, receiver=0x2b56380, event=0x7fff3724bb90) at kernel/qcoreapplication.cpp:787
#18 0x00007ff13554ed62 in sendEvent (event=0x7fff3724bb90, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0xc2dae0) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007ff13554c538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007ff12c8e5a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ff12c8e6258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ff12c8e6429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ff13554ced6 in QEventDispatcherGlib::processEvents (this=0xbbef40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007ff13497a07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007ff135520cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007ff135520ef7 in QEventLoop::exec (this=0x7fff3724be20, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007ff135525789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007ff1386661a3 in kdemain (argc=1, argv=0x7fff3724c208) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007ff1382a730d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff3724c208, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3724c1f8) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289064, bug 289025, bug 288954, bug 288894, bug 288874.

Reported using DrKonqi