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 i686
Distribution: Ubuntu 11.10

-- Information about the crash:
Switching between some applications in Task Manager. Crash occurs when new apllication window should take input focus.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5f80720 (LWP 1442))]

Thread 4 (Thread 0xafe79b70 (LWP 1443)):
#0  0x00eb2416 in __kernel_vsyscall ()
#1  0x0046040e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x0152134b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01512896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01512c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05886b37 in QEventDispatcherGlib::processEvents (this=0x956b798, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x058571dd in QEventLoop::processEvents (this=0xafe791f0, flags=...) at kernel/qeventloop.cpp:149
#7  0x05857421 in QEventLoop::exec (this=0xafe791f0, flags=...) at kernel/qeventloop.cpp:201
#8  0x0575a90b in QThread::exec (this=0x9569970) at thread/qthread.cpp:498
#9  0x05837e2d in QInotifyFileSystemWatcherEngine::run (this=0x9569970) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x0575d7b3 in QThreadPrivate::start (arg=0x9569970) at thread/qthread_unix.cpp:331
#11 0x01ab19cd in ?? () from /usr/lib/nvidia-current/libGL.so.1
#12 0x0046f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xae57bb70 (LWP 1444)):
#0  0x058874b9 in QTimerInfoList::updateCurrentTime (this=0x91b1acc) at kernel/qeventdispatcher_unix.cpp:339
#1  0x0588780a in QTimerInfoList::timerWait (this=0x91b1acc, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#2  0x05886053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xae57b06c) at kernel/qeventdispatcher_glib.cpp:136
#3  0x058860ed in timerSourcePrepare (source=0x91b1a98, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#4  0x0151188c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x01512637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0x01512c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x05886b37 in QEventDispatcherGlib::processEvents (this=0x91b27d8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#8  0x058571dd in QEventLoop::processEvents (this=0xae57b1f0, flags=...) at kernel/qeventloop.cpp:149
#9  0x05857421 in QEventLoop::exec (this=0xae57b1f0, flags=...) at kernel/qeventloop.cpp:201
#10 0x0575a90b in QThread::exec (this=0x91b1ff0) at thread/qthread.cpp:498
#11 0x05837e2d in QInotifyFileSystemWatcherEngine::run (this=0x91b1ff0) at io/qfilesystemwatcher_inotify.cpp:248
#12 0x0575d7b3 in QThreadPrivate::start (arg=0x91b1ff0) at thread/qthread_unix.cpp:331
#13 0x01ab19cd in ?? () from /usr/lib/nvidia-current/libGL.so.1
#14 0x0046f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xacd78b70 (LWP 1450)):
#0  0x00eb2414 in __kernel_vsyscall ()
#1  0x0046040e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x0152134b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x01512896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x01512f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x06872cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x015395f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x01ab19cd in ?? () from /usr/lib/nvidia-current/libGL.so.1
#8  0x0046f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb5f80720 (LWP 1442)):
[KCrash Handler]
#7  isNull (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x95bcbe0) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x04726662 in WindowTaskItem::publishIconGeometry (this=0x9c1e890) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x04737688 in AbstractTaskItem::timerEvent (this=0x9c1e890, event=0xbff4043c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x05870994 in QObject::event (this=0x9c1e890, e=0xbff4043c) at kernel/qobject.cpp:1181
#13 0x06502bd4 in QGraphicsWidget::event (this=0x9c1e890, event=0xbff4043c) at graphicsview/qgraphicswidget.cpp:1455
#14 0x05e43d54 in notify_helper (e=0xbff4043c, receiver=0x9c1e890, this=0x8fdeee0) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8fdeee0, receiver=0x9c1e890, e=0xbff4043c) at kernel/qapplication.cpp:4458
#16 0x05e49103 in QApplication::notify (this=0xbff4043c, receiver=0x9c1e890, e=0xbff4043c) at kernel/qapplication.cpp:3886
#17 0x010b4681 in KApplication::notify (this=0x8fcb878, receiver=0x9c1e890, event=0xbff4043c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x0585819e in QCoreApplication::notifyInternal (this=0x8fcb878, receiver=0x9c1e890, event=0xbff4043c) at kernel/qcoreapplication.cpp:787
#19 0x05888c10 in sendEvent (event=0xbff4043c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8fe1ed4) at kernel/qeventdispatcher_unix.cpp:603
#21 0x05886122 in timerSourceDispatch (source=0x8fe1ea0) at kernel/qeventdispatcher_glib.cpp:184
#22 0x0151225f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#23 0x01512990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x01512c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x05886ada in QEventDispatcherGlib::processEvents (this=0x8f50230, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#26 0x05efbe3a in QGuiEventDispatcherGlib::processEvents (this=0x8f50230, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x058571dd in QEventLoop::processEvents (this=0xbff406b4, flags=...) at kernel/qeventloop.cpp:149
#28 0x05857421 in QEventLoop::exec (this=0xbff406b4, flags=...) at kernel/qeventloop.cpp:201
#29 0x0585c19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x05e418f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#31 0x0016818b in kdemain (argc=1, argv=0xbff408b4) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x0804850b in main (argc=1, argv=0xbff408b4) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290004, bug 289985, bug 289957, bug 289952, bug 289940.

Reported using DrKonqi