Bug 286823

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:

I noticed several time when I change from FF to some other application that plasma crashes.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ffbffe767a0 (LWP 2419))]

Thread 8 (Thread 0x7ffbe21df700 (LWP 2421)):
#0  0x00007ffbff761773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ffbf3cebf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffbf3cec429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffbfc952f3e in QEventDispatcherGlib::processEvents (this=0x2ca7020, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ffbfc926cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ffbfc926ef7 in QEventLoop::exec (this=0x7ffbe21dedb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007ffbfc83e27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007ffbfc909cbf in QInotifyFileSystemWatcherEngine::run (this=0x2c80a80) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x2c80a80) at thread/qthread_unix.cpp:331
#9  0x00007ffbf47f8efc in start_thread (arg=0x7ffbe21df700) at pthread_create.c:304
#10 0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7ffbe0eb3700 (LWP 2422)):
#0  0x00007ffbf41a7310 in ?? () from /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0
#1  0x00007ffbf3d123dd in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffbf3cec419 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffbfc952f3e in QEventDispatcherGlib::processEvents (this=0x2e63530, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007ffbfc926cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ffbfc926ef7 in QEventLoop::exec (this=0x7ffbe0eb2db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007ffbfc83e27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007ffbfc909cbf in QInotifyFileSystemWatcherEngine::run (this=0x2e62900) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x2e62900) at thread/qthread_unix.cpp:331
#9  0x00007ffbf47f8efc in start_thread (arg=0x7ffbe0eb3700) at pthread_create.c:304
#10 0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7ffbd1281700 (LWP 4812)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffbfc8411ab in wait (time=18446744073709551615, this=0x2d2f780) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2d0d990, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffbf863b864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2d96620, th=0x3e3b780) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ffbf863de0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2d0dd70, th=0x3e3b780) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ffbf863cccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ffbd1280e00, parent=0x2d96620, th=0x3e3b780) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ffbf863cd5b in ThreadWeaver::Thread::run (this=0x3e3b780) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x3e3b780) at thread/qthread_unix.cpp:331
#8  0x00007ffbf47f8efc in start_thread (arg=0x7ffbd1281700) at pthread_create.c:304
#9  0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7ffbd3885700 (LWP 4813)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffbfc8411ab in wait (time=18446744073709551615, this=0x2d2f780) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2d0d990, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffbf863b864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2d96620, th=0x7ffbdc007f20) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ffbf863de0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2d0dd70, th=0x7ffbdc007f20) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ffbf863cccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ffbd3884e00, parent=0x2d96620, th=0x7ffbdc007f20) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ffbf863cd5b in ThreadWeaver::Thread::run (this=0x7ffbdc007f20) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x7ffbdc007f20) at thread/qthread_unix.cpp:331
#8  0x00007ffbf47f8efc in start_thread (arg=0x7ffbd3885700) at pthread_create.c:304
#9  0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7ffbcdc6c700 (LWP 4814)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffbfc8411ab in wait (time=18446744073709551615, this=0x2d2f780) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2d0d990, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffbf863b864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2d96620, th=0x7ffbdc00ee20) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ffbf863de0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2d0dd70, th=0x7ffbdc00ee20) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ffbf863cccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ffbcdc6be00, parent=0x2d96620, th=0x7ffbdc00ee20) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ffbf863cd5b in ThreadWeaver::Thread::run (this=0x7ffbdc00ee20) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x7ffbdc00ee20) at thread/qthread_unix.cpp:331
#8  0x00007ffbf47f8efc in start_thread (arg=0x7ffbcdc6c700) at pthread_create.c:304
#9  0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7ffbcd46b700 (LWP 4815)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffbfc8411ab in wait (time=18446744073709551615, this=0x2d2f780) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2d0d990, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffbf863b864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2d96620, th=0x36d7770) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ffbf863de0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2d0dd70, th=0x36d7770) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ffbf863cccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ffbcd46ae00, parent=0x2d96620, th=0x36d7770) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ffbf863cd5b in ThreadWeaver::Thread::run (this=0x36d7770) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x36d7770) at thread/qthread_unix.cpp:331
#8  0x00007ffbf47f8efc in start_thread (arg=0x7ffbcd46b700) at pthread_create.c:304
#9  0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7ffbccc6a700 (LWP 4816)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffbfc8411ab in wait (time=18446744073709551615, this=0x2d2f780) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x2d0d990, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007ffbf863b864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2d96620, th=0x2e550d0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007ffbf863de0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2d0dd70, th=0x2e550d0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007ffbf863cccf in ThreadWeaver::ThreadRunHelper::run (this=0x7ffbccc69e00, parent=0x2d96620, th=0x2e550d0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007ffbf863cd5b in ThreadWeaver::Thread::run (this=0x2e550d0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007ffbfc840d05 in QThreadPrivate::start (arg=0x2e550d0) at thread/qthread_unix.cpp:331
#8  0x00007ffbf47f8efc in start_thread (arg=0x7ffbccc6a700) at pthread_create.c:304
#9  0x00007ffbff76d89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffbffe767a0 (LWP 2419)):
[KCrash Handler]
#6  operator== (value=0, this=0xd) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x3bb3fc0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x3bb3fc0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007ffbe5111112 in WindowTaskItem::publishIconGeometry (this=0x388c4b0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007ffbe511fb7c in AbstractTaskItem::timerEvent (this=0x388c4b0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007ffbfc93e789 in QObject::event (this=0x388c4b0, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007ffbfc2f689b in QGraphicsWidget::event (this=0x388c4b0, event=0x7fff42641850) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007ffbfbcd8424 in notify_helper (e=0x7fff42641850, receiver=0x388c4b0, this=0x240ab70) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x240ab70, receiver=0x388c4b0, e=0x7fff42641850) at kernel/qapplication.cpp:4458
#16 0x00007ffbfbcdd291 in QApplication::notify (this=0x23fce10, receiver=0x388c4b0, e=0x7fff42641850) at kernel/qapplication.cpp:4365
#17 0x00007ffbfd5d6126 in KApplication::notify (this=0x23fce10, receiver=0x388c4b0, event=0x7fff42641850) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007ffbfc927afc in QCoreApplication::notifyInternal (this=0x23fce10, receiver=0x388c4b0, event=0x7fff42641850) at kernel/qcoreapplication.cpp:787
#19 0x00007ffbfc954d62 in sendEvent (event=0x7fff42641850, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x240e5c0) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007ffbfc952538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007ffbf3ceba5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ffbf3cec258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ffbf3cec429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007ffbfc952ed6 in QEventDispatcherGlib::processEvents (this=0x2395f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007ffbfbd8007e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007ffbfc926cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007ffbfc926ef7 in QEventLoop::exec (this=0x7fff42641ae0, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007ffbfc92b789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007ffbffa6c1a3 in kdemain (argc=1, argv=0x7fff42641ec8) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007ffbff6ad30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff42641ec8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff42641eb8) at libc-start.c:226
#33 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 286582.

Possible duplicates by query: bug 286785, bug 286723, bug 286695, bug 286616, bug 286582.

Reported using DrKonqi