Bug 290993

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:
I've just closed and opened pidgins' buddy list number of times. Pidgin hasn't crashed, only plasma desktop.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb05a4720 (LWP 1877))]

Thread 3 (Thread 0xa98d6b70 (LWP 1878)):
#0  0xb303cd70 in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0xb765af14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2f200c3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2f20990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2f20c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb6498b37 in QEventDispatcherGlib::processEvents (this=0x8e55ab8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb64691dd in QEventLoop::processEvents (this=0xa98d61f0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6469421 in QEventLoop::exec (this=0xa98d61f0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb636c90b in QThread::exec (this=0x8e556b8) at thread/qthread.cpp:498
#9  0xb6449e2d in QInotifyFileSystemWatcherEngine::run (this=0x8e556b8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb636f7b3 in QThreadPrivate::start (arg=0x8e556b8) at thread/qthread_unix.cpp:331
#11 0xb268a9cd in ?? () from /usr/lib/nvidia-current/libGL.so.1
#12 0xb764d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa7c1bb70 (LWP 1879)):
#0  0xb7792424 in __kernel_vsyscall ()
#1  0xb763e40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2f2f34b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2f20896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2f20c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb6498b37 in QEventDispatcherGlib::processEvents (this=0x8ff4730, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb64691dd in QEventLoop::processEvents (this=0xa7c1b1f0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb6469421 in QEventLoop::exec (this=0xa7c1b1f0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb636c90b in QThread::exec (this=0x86c76d8) at thread/qthread.cpp:498
#9  0xb6449e2d in QInotifyFileSystemWatcherEngine::run (this=0x86c76d8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb636f7b3 in QThreadPrivate::start (arg=0x86c76d8) at thread/qthread_unix.cpp:331
#11 0xb268a9cd in ?? () from /usr/lib/nvidia-current/libGL.so.1
#12 0xb764d0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb05a4720 (LWP 1877)):
[KCrash Handler]
#7  isNull (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x9eff148) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xaf064662 in WindowTaskItem::publishIconGeometry (this=0x99a8500) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0xaf075688 in AbstractTaskItem::timerEvent (this=0x99a8500, event=0xbfa2cd4c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0xb6482994 in QObject::event (this=0x99a8500, e=0xbfa2cd4c) at kernel/qobject.cpp:1181
#13 0xb6054bd4 in QGraphicsWidget::event (this=0x99a8500, event=0xbfa2cd4c) at graphicsview/qgraphicswidget.cpp:1455
#14 0xb5995d54 in notify_helper (e=0xbfa2cd4c, receiver=0x99a8500, this=0x84d6b48) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x84d6b48, receiver=0x99a8500, e=0xbfa2cd4c) at kernel/qapplication.cpp:4458
#16 0xb599b103 in QApplication::notify (this=0xbfa2cd4c, receiver=0x99a8500, e=0xbfa2cd4c) at kernel/qapplication.cpp:3886
#17 0xb6acf681 in KApplication::notify (this=0x84cd028, receiver=0x99a8500, event=0xbfa2cd4c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0xb646a19e in QCoreApplication::notifyInternal (this=0x84cd028, receiver=0x99a8500, event=0xbfa2cd4c) at kernel/qcoreapplication.cpp:787
#19 0xb649ac10 in sendEvent (event=0xbfa2cd4c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x84daeb4) at kernel/qeventdispatcher_unix.cpp:603
#21 0xb6498122 in timerSourceDispatch (source=0x84dae80) at kernel/qeventdispatcher_glib.cpp:184
#22 0xb2f2025f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0xb2f20990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb2f20c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb6498ada in QEventDispatcherGlib::processEvents (this=0x8446218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#26 0xb5a4de3a in QGuiEventDispatcherGlib::processEvents (this=0x8446218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0xb64691dd in QEventLoop::processEvents (this=0xbfa2cfc4, flags=...) at kernel/qeventloop.cpp:149
#28 0xb6469421 in QEventLoop::exec (this=0xbfa2cfc4, flags=...) at kernel/qeventloop.cpp:201
#29 0xb646e19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0xb59938f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#31 0xb774718b in kdemain (argc=1, argv=0xbfa2d1c4) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x0804850b in main (argc=1, argv=0xbfa2d1c4) at plasma-desktop_dummy.cpp:3

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

Possible duplicates by query: bug 290969, bug 290943, bug 290926, bug 290881, bug 290870.

Reported using DrKonqi