Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic i686
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Quit bc in Konsole and Surf the Internet by Firefox.Firefox Version is :10 Beta
KDE on the KUbuntu11.10,4.7.3
- Custom settings of the application:
Widgets on my desktop:
Eyes,Luna,KALgebra,photo viewer,note,system montior,desktop folder,whiteborad(Sorry,I'm not using English,so some widgets' names is different your know)
Theme:Oxygen
Activity:Default
Please fix the bug.Plasma crashed like this about once a day.(Maybe not was the same doing when it crashed)
Thanks!

-- Backtrace:
Application: Plasma 桌面外壳 (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb772f940 (LWP 1707))]

Thread 4 (Thread 0xb131db70 (LWP 1716)):
#0  0x01743815 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0x01744637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0x01744c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x05301b37 in QEventDispatcherGlib::processEvents (this=0x9308a78, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x052d21dd in QEventLoop::processEvents (this=0xb131d2a0, flags=...) at kernel/qeventloop.cpp:149
#5  0x052d2421 in QEventLoop::exec (this=0xb131d2a0, flags=...) at kernel/qeventloop.cpp:201
#6  0x051d590b in QThread::exec (this=0x9306c70) at thread/qthread.cpp:498
#7  0x052b2e2d in QInotifyFileSystemWatcherEngine::run (this=0x9306c70) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x051d87b3 in QThreadPrivate::start (arg=0x9306c70) at thread/qthread_unix.cpp:331
#9  0x082c7d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#10 0x007450ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xaf843b70 (LWP 1720)):
#0  0x00206416 in __kernel_vsyscall ()
#1  0x0073640e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x0175334b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01744896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01744c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05301b37 in QEventDispatcherGlib::processEvents (this=0x9574de8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x052d21dd in QEventLoop::processEvents (this=0xaf8432a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x052d2421 in QEventLoop::exec (this=0xaf8432a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x051d590b in QThread::exec (this=0x9574950) at thread/qthread.cpp:498
#9  0x052b2e2d in QInotifyFileSystemWatcherEngine::run (this=0x9574950) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x051d87b3 in QThreadPrivate::start (arg=0x9574950) at thread/qthread_unix.cpp:331
#11 0x082c7d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x007450ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xad5c1b70 (LWP 1771)):
#0  0x00206416 in __kernel_vsyscall ()
#1  0x0073640e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x0175334b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01744896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01744f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05bd9cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x0176b5f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x082c7d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x007450ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb772f940 (LWP 1707)):
[KCrash Handler]
#7  isNull (this=0x40) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x40) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x99de6b8) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x02fd5662 in WindowTaskItem::publishIconGeometry (this=0x9a88ea0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x02fe6688 in AbstractTaskItem::timerEvent (this=0x9a88ea0, event=0xbfad104c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x052eb994 in QObject::event (this=0x9a88ea0, e=0xbfad104c) at kernel/qobject.cpp:1181
#13 0x03e8cbd4 in QGraphicsWidget::event (this=0x9a88ea0, event=0xbfad104c) at graphicsview/qgraphicswidget.cpp:1455
#14 0x037cdd54 in notify_helper (e=0xbfad104c, receiver=0x9a88ea0, this=0x8e4cd80) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8e4cd80, receiver=0x9a88ea0, e=0xbfad104c) at kernel/qapplication.cpp:4458
#16 0x037d3103 in QApplication::notify (this=0xbfad104c, receiver=0x9a88ea0, e=0xbfad104c) at kernel/qapplication.cpp:3886
#17 0x010e2681 in KApplication::notify (this=0x8e358b0, receiver=0x9a88ea0, event=0xbfad104c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x052d319e in QCoreApplication::notifyInternal (this=0x8e358b0, receiver=0x9a88ea0, event=0xbfad104c) at kernel/qcoreapplication.cpp:787
#19 0x05303c10 in sendEvent (event=0xbfad104c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8e4fabc) at kernel/qeventdispatcher_unix.cpp:603
#21 0x05301122 in timerSourceDispatch (source=0x8e4fa88) at kernel/qeventdispatcher_glib.cpp:184
#22 0x0174425f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0x01744990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x01744c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x05301b37 in QEventDispatcherGlib::processEvents (this=0x8df5218, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#26 0x03885e3a in QGuiEventDispatcherGlib::processEvents (this=0x8df5218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x052d21dd in QEventLoop::processEvents (this=0xbfad12c4, flags=...) at kernel/qeventloop.cpp:149
#28 0x052d2421 in QEventLoop::exec (this=0xbfad12c4, flags=...) at kernel/qeventloop.cpp:201
#29 0x052d719d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x037cb8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#31 0x0016318b in kdemain (argc=1, argv=0xbfad14c4) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x0804850b in main (argc=1, argv=0xbfad14c4) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 292267, bug 292259, bug 292254, bug 292253, bug 292242.

Reported using DrKonqi