Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

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

while it crashing i was installing OS into virtualbox also used firefox dolphin.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fae291bd7c0 (LWP 4872))]

Thread 6 (Thread 0x7fae0846a700 (LWP 4873)):
#0  0x00007fae25d8349b in idleTimerSourcePrepare (source=<optimized out>, timeout=0x7fae08469bfc) at kernel/qeventdispatcher_glib.cpp:207
#1  0x00007fae1d11bff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fae1d11cdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fae1d11d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fae25d83f3e in QEventDispatcherGlib::processEvents (this=0x1908ee0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fae25d57cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fae25d57ef7 in QEventLoop::exec (this=0x7fae08469d90, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fae25c6f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007fae25d3acbf in QInotifyFileSystemWatcherEngine::run (this=0x19071f0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fae25c71d05 in QThreadPrivate::start (arg=0x19071f0) at thread/qthread_unix.cpp:331
#10 0x00007fae1dc29efc in start_thread (arg=0x7fae0846a700) at pthread_create.c:304
#11 0x00007fae28b9e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fadfe7f4700 (LWP 4874)):
#0  0x00007fae1dc2c03e in __pthread_mutex_lock (mutex=0x1e00828) at pthread_mutex_lock.c:62
#1  0x00007fae1d11c361 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fae1d11ce6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fae1d11d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fae25d83f3e in QEventDispatcherGlib::processEvents (this=0x1e00800, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fae25d57cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fae25d57ef7 in QEventLoop::exec (this=0x7fadfe7f3d90, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fae25c6f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007fae25d3acbf in QInotifyFileSystemWatcherEngine::run (this=0x1dfce30) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fae25c71d05 in QThreadPrivate::start (arg=0x1dfce30) at thread/qthread_unix.cpp:331
#10 0x00007fae1dc29efc in start_thread (arg=0x7fadfe7f4700) at pthread_create.c:304
#11 0x00007fae28b9e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fadfb5a5700 (LWP 4880)):
#0  0x00007fae28b92773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fae1d11cf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fae1d11d792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fadfc083516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fae1d1422b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fae1dc29efc in start_thread (arg=0x7fadfb5a5700) at pthread_create.c:304
#6  0x00007fae28b9e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fadf8488700 (LWP 5989)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fae2422bc2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fae2422bd59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fae1dc29efc in start_thread (arg=0x7fadf8488700) at pthread_create.c:304
#4  0x00007fae28b9e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fadf7c87700 (LWP 5990)):
#0  0x00007fae1dc2d1fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7fae0001ab78) at pthread_mutex_unlock.c:290
#2  0x00007fae1d11bfe4 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fae1d11cdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fae1d11d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fae25d83f3e in QEventDispatcherGlib::processEvents (this=0x150aaf0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fae25d57cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fae25d57ef7 in QEventLoop::exec (this=0x7fadf7c86dc0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007fae25c6f27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007fae25c71d05 in QThreadPrivate::start (arg=0x3cce960) at thread/qthread_unix.cpp:331
#10 0x00007fae1dc29efc in start_thread (arg=0x7fadf7c87700) at pthread_create.c:304
#11 0x00007fae28b9e89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fae291bd7c0 (LWP 4872)):
[KCrash Handler]
#6  operator== (value=0, this=0xd) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x44d8a10) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x44d8a10) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007fae0ed44112 in WindowTaskItem::publishIconGeometry (this=0x489ef30) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007fae0ed52b7c in AbstractTaskItem::timerEvent (this=0x489ef30, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007fae25d6f789 in QObject::event (this=0x489ef30, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007fae2572789b in QGraphicsWidget::event (this=0x489ef30, event=0x7fffd9c061f0) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007fae25109424 in notify_helper (e=0x7fffd9c061f0, receiver=0x489ef30, this=0x1025330) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x1025330, receiver=0x489ef30, e=0x7fffd9c061f0) at kernel/qapplication.cpp:4458
#16 0x00007fae2510e291 in QApplication::notify (this=0x1003860, receiver=0x489ef30, e=0x7fffd9c061f0) at kernel/qapplication.cpp:4365
#17 0x00007fae26a07126 in KApplication::notify (this=0x1003860, receiver=0x489ef30, event=0x7fffd9c061f0) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007fae25d58afc in QCoreApplication::notifyInternal (this=0x1003860, receiver=0x489ef30, event=0x7fffd9c061f0) at kernel/qcoreapplication.cpp:787
#19 0x00007fae25d85d62 in sendEvent (event=0x7fffd9c061f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x10233b0) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007fae25d83538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007fae1d11ca5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fae1d11d258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fae1d11d429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fae25d83ed6 in QEventDispatcherGlib::processEvents (this=0xfb3f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007fae251b107e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007fae25d57cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007fae25d57ef7 in QEventLoop::exec (this=0x7fffd9c06480, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007fae25d5c789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007fae28e9d1a3 in kdemain (argc=1, argv=0x7fffd9c06868) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007fae28ade30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffd9c06868, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd9c06858) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 290280, bug 290218, bug 290213, bug 290185, bug 290152.

Reported using DrKonqi