Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.2.0-5-generic x86_64
Distribution: Ubuntu precise (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
I surfing on Internet when plasma-dektop crashed.
- Unusual behavior I noticed:
Plasma-dektop crashed
- Custom settings of the application:
I have kubuntu-low-fat-settings package installed

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma-työpöytäympäristö (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8f0ee6f7a0 (LWP 1448))]

Thread 8 (Thread 0x7f8eec55e700 (LWP 1449)):
#0  0x00007f8f0e741b8d in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f8f02d47c7f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f02d0d26d in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f02d0d746 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f02d0d8d4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f0b93af0e in QEventDispatcherGlib::processEvents (this=0x17e7f90, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f8f0b90ee22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f8f0b90f027 in QEventLoop::exec (this=0x7f8eec55ddb0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f8f0b8263bf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f8f0b8f1def in QInotifyFileSystemWatcherEngine::run (this=0x17e4d90) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f8f0b828e45 in QThreadPrivate::start (arg=0x17e4d90) at thread/qthread_unix.cpp:331
#11 0x00007f8f03812efc in start_thread (arg=0x7f8eec55e700) at pthread_create.c:304
#12 0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f8ee9716700 (LWP 1450)):
#0  0x00007f8f0e741b8d in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f8f02d47c7f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f02d0d26d in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f02d0d746 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f02d0d8d4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8f0b93af0e in QEventDispatcherGlib::processEvents (this=0x19b0950, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f8f0b90ee22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f8f0b90f027 in QEventLoop::exec (this=0x7f8ee9715db0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f8f0b8263bf in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f8f0b8f1def in QInotifyFileSystemWatcherEngine::run (this=0x183ea40) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f8f0b828e45 in QThreadPrivate::start (arg=0x183ea40) at thread/qthread_unix.cpp:331
#11 0x00007f8f03812efc in start_thread (arg=0x7f8ee9716700) at pthread_create.c:304
#12 0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f8edfa21700 (LWP 1460)):
#0  0x00007f8f0e741b8d in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f8f02d47c7f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8f02d0d26d in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8f02d0d746 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8f02d0dc0a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8ee0510546 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f8f02d2ed15 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f8f03812efc in start_thread (arg=0x7f8edfa21700) at pthread_create.c:304
#8  0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f8edcbc4700 (LWP 1523)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8f0b8292eb in wait (time=18446744073709551615, this=0x184e900) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x18166c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f8f07698864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1833420, th=0x29caae0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f8f0769ae0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1820210, th=0x29caae0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f8f07699ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f8edcbc3e00, parent=0x1833420, th=0x29caae0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f8f07699d5b in ThreadWeaver::Thread::run (this=0x29caae0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f8f0b828e45 in QThreadPrivate::start (arg=0x29caae0) at thread/qthread_unix.cpp:331
#8  0x00007f8f03812efc in start_thread (arg=0x7f8edcbc4700) at pthread_create.c:304
#9  0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f8edc3c3700 (LWP 1524)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8f0b8292eb in wait (time=18446744073709551615, this=0x184e900) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x18166c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f8f07698864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1833420, th=0x2782dc0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f8f0769ae0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1820210, th=0x2782dc0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f8f07699ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f8edc3c2e00, parent=0x1833420, th=0x2782dc0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f8f07699d5b in ThreadWeaver::Thread::run (this=0x2782dc0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f8f0b828e45 in QThreadPrivate::start (arg=0x2782dc0) at thread/qthread_unix.cpp:331
#8  0x00007f8f03812efc in start_thread (arg=0x7f8edc3c3700) at pthread_create.c:304
#9  0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f8edbbc2700 (LWP 1525)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8f0b8292eb in wait (time=18446744073709551615, this=0x184e900) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x18166c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f8f07698864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1833420, th=0xeae4b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f8f0769ae0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1820210, th=0xeae4b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f8f0769ae24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1820210, th=0xeae4b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f8f07699ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f8edbbc1e00, parent=0x1833420, th=0xeae4b0) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007f8f07699d5b in ThreadWeaver::Thread::run (this=0xeae4b0) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007f8f0b828e45 in QThreadPrivate::start (arg=0xeae4b0) at thread/qthread_unix.cpp:331
#9  0x00007f8f03812efc in start_thread (arg=0x7f8edbbc2700) at pthread_create.c:304
#10 0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8edb3c1700 (LWP 1526)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8f0b8292eb in wait (time=18446744073709551615, this=0x184e900) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x18166c0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f8f07698864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x1833420, th=0x276c9a0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f8f0769ae0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1820210, th=0x276c9a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f8f07699ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f8edb3c0e00, parent=0x1833420, th=0x276c9a0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f8f07699d5b in ThreadWeaver::Thread::run (this=0x276c9a0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f8f0b828e45 in QThreadPrivate::start (arg=0x276c9a0) at thread/qthread_unix.cpp:331
#8  0x00007f8f03812efc in start_thread (arg=0x7f8edb3c1700) at pthread_create.c:304
#9  0x00007f8f0e74f87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8f0ee6f7a0 (LWP 1448)):
[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=0x2e764a0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f8ef4d5a112 in WindowTaskItem::publishIconGeometry (this=0x3255fd0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f8ef4d68b7c in AbstractTaskItem::timerEvent (this=0x3255fd0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f8f0b926759 in QObject::event (this=0x3255fd0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f8f0b2fb38b in QGraphicsWidget::event (this=0x3255fd0, event=0x7fff799d6a60) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f8f0acdcf64 in notify_helper (e=0x7fff799d6a60, receiver=0x3255fd0, this=0xe67a30) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0xe67a30, receiver=0x3255fd0, e=0x7fff799d6a60) at kernel/qapplication.cpp:4458
#15 0x00007f8f0ace1dd1 in QApplication::notify (this=0xe57d90, receiver=0x3255fd0, e=0x7fff799d6a60) at kernel/qapplication.cpp:4365
#16 0x00007f8f0c5b8126 in KApplication::notify (this=0xe57d90, receiver=0x3255fd0, event=0x7fff799d6a60) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f8f0b90fc2c in QCoreApplication::notifyInternal (this=0xe57d90, receiver=0x3255fd0, event=0x7fff799d6a60) at kernel/qcoreapplication.cpp:787
#18 0x00007f8f0b93cd32 in sendEvent (event=0x7fff799d6a60, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0xe6ab00) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f8f0b93a508 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f8f02d0d44a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f8f02d0d810 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f8f02d0d8d4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f8f0b93aea6 in QEventDispatcherGlib::processEvents (this=0xdeff40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f8f0ad84bbe in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f8f0b90ee22 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f8f0b90f027 in QEventLoop::exec (this=0x7fff799d6cc0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f8f0b913759 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f8f0ea4e1a3 in kdemain (argc=1, argv=0x7fff799d70a8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f8f0e68f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff799d70a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff799d7098) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289073, bug 289064, bug 289025, bug 288954, bug 288894.

Reported using DrKonqi