Bug 291943

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-pae i686
Distribution: Ubuntu 11.10

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

The desktop simply crashed, i'm not doing anything, i found the error when i woke up the computer

The crash can be reproduced some of the time.

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb04fe720 (LWP 1627))]

Thread 4 (Thread 0xa9750b70 (LWP 1629)):
#0  0xb2f96dbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb75b4f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2e7a0c3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2e7a990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2e7ac2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb63f2b37 in QEventDispatcherGlib::processEvents (this=0xa411888, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb63c31dd in QEventLoop::processEvents (this=0xa97501f0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb63c3421 in QEventLoop::exec (this=0xa97501f0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb62c690b in QThread::exec (this=0xa40f530) at thread/qthread.cpp:498
#9  0xb63a3e2d in QInotifyFileSystemWatcherEngine::run (this=0xa40f530) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb62c97b3 in QThreadPrivate::start (arg=0xa40f530) at thread/qthread_unix.cpp:331
#11 0xb25e49cd in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#12 0xb75a70ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xa7c73b70 (LWP 1630)):
#0  0xb2f96d70 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb75b4f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2e78eda in g_main_context_acquire () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2e7a56d in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2e7ac2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb63f2b37 in QEventDispatcherGlib::processEvents (this=0xa56dfe0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb63c31dd in QEventLoop::processEvents (this=0xa7c731f0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb63c3421 in QEventLoop::exec (this=0xa7c731f0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb62c690b in QThread::exec (this=0xa56d840) at thread/qthread.cpp:498
#9  0xb63a3e2d in QInotifyFileSystemWatcherEngine::run (this=0xa56d840) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb62c97b3 in QThreadPrivate::start (arg=0xa56d840) at thread/qthread_unix.cpp:331
#11 0xb25e49cd in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#12 0xb75a70ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa5630b70 (LWP 1684)):
#0  0xb2f96dc6 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb75b4f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2e798bb in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2e7a637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2e7af9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xa5f10cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb2ea15f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb25e49cd in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#8  0xb75a70ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb04fe720 (LWP 1627)):
[KCrash Handler]
#7  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0xa6b1b58) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xaefcf662 in WindowTaskItem::publishIconGeometry (this=0xad28f78) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0xaefe0688 in AbstractTaskItem::timerEvent (this=0xad28f78, event=0xbfbf64fc) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0xb63dc994 in QObject::event (this=0xad28f78, e=0xbfbf64fc) at kernel/qobject.cpp:1181
#13 0xb5faebd4 in QGraphicsWidget::event (this=0xad28f78, event=0xbfbf64fc) at graphicsview/qgraphicswidget.cpp:1455
#14 0xb58efd54 in notify_helper (e=0xbfbf64fc, receiver=0xad28f78, this=0x9cc0980) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x9cc0980, receiver=0xad28f78, e=0xbfbf64fc) at kernel/qapplication.cpp:4458
#16 0xb58f5103 in QApplication::notify (this=0xbfbf64fc, receiver=0xad28f78, e=0xbfbf64fc) at kernel/qapplication.cpp:3886
#17 0xb6a29681 in KApplication::notify (this=0x9cb52a8, receiver=0xad28f78, event=0xbfbf64fc) at ../../kdeui/kernel/kapplication.cpp:311
#18 0xb63c419e in QCoreApplication::notifyInternal (this=0x9cb52a8, receiver=0xad28f78, event=0xbfbf64fc) at kernel/qcoreapplication.cpp:787
#19 0xb63f4c10 in sendEvent (event=0xbfbf64fc, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x9cc44cc) at kernel/qeventdispatcher_unix.cpp:603
#21 0xb63f2122 in timerSourceDispatch (source=0x9cc4498) at kernel/qeventdispatcher_glib.cpp:184
#22 0xb2e7a25f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0xb2e7a990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb2e7ac2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb63f2ada in QEventDispatcherGlib::processEvents (this=0x9c2c218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#26 0xb59a7e3a in QGuiEventDispatcherGlib::processEvents (this=0x9c2c218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0xb63c31dd in QEventLoop::processEvents (this=0xbfbf6774, flags=...) at kernel/qeventloop.cpp:149
#28 0xb63c3421 in QEventLoop::exec (this=0xbfbf6774, flags=...) at kernel/qeventloop.cpp:201
#29 0xb63c819d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0xb58ed8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#31 0xb769b18b in kdemain (argc=1, argv=0xbfbf6974) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x0804850b in main (argc=1, argv=0xbfbf6974) at plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 272495.

Possible duplicates by query: bug 291919, bug 291918, bug 291914, bug 291911, bug 291905.

Reported using DrKonqi