Bug 290106

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: switching application using taskbar

- Unusual behavior I noticed: Taskbar disappears and appears again. KDE applications are responsiveness

-- Backtrace:
Application: Àrea de treball de l'escriptori Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb1fc6b20 (LWP 2084))]

Thread 4 (Thread 0xaaf42b70 (LWP 2085)):
#0  0xb7856424 in __kernel_vsyscall ()
#1  0xb770040e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2ff134b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2fe2896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2fe2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb655ab37 in QEventDispatcherGlib::processEvents (this=0xa681ff8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0xb652b1dd in QEventLoop::processEvents (this=0xaaf422a0, flags=...) at kernel/qeventloop.cpp:149
#7  0xb652b421 in QEventLoop::exec (this=0xaaf422a0, flags=...) at kernel/qeventloop.cpp:201
#8  0xb642e90b in QThread::exec (this=0xa685240) at thread/qthread.cpp:498
#9  0xb650be2d in QInotifyFileSystemWatcherEngine::run (this=0xa685240) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb64317b3 in QThreadPrivate::start (arg=0xa685240) at thread/qthread_unix.cpp:331
#11 0xb30fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0xb770f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xa9435b70 (LWP 2086)):
#0  0xb309cd10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0xb64887d5 in do_gettime (frac=0xa9435010, sec=0xa9435008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0xb655b4b6 in QTimerInfoList::updateCurrentTime (this=0xaa6006f4) at kernel/qeventdispatcher_unix.cpp:339
#4  0xb655b80a in QTimerInfoList::timerWait (this=0xaa6006f4, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0xb655a053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xa943511c) at kernel/qeventdispatcher_glib.cpp:136
#6  0xb655a0ed in timerSourcePrepare (source=0xaa6006c0, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0xb2fe188c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb2fe2637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb2fe2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0xb655ab37 in QEventDispatcherGlib::processEvents (this=0xa71e7b0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0xb652b1dd in QEventLoop::processEvents (this=0xa94352a0, flags=...) at kernel/qeventloop.cpp:149
#12 0xb652b421 in QEventLoop::exec (this=0xa94352a0, flags=...) at kernel/qeventloop.cpp:201
#13 0xb642e90b in QThread::exec (this=0xa1850e8) at thread/qthread.cpp:498
#14 0xb650be2d in QInotifyFileSystemWatcherEngine::run (this=0xa1850e8) at io/qfilesystemwatcher_inotify.cpp:248
#15 0xb64317b3 in QThreadPrivate::start (arg=0xa1850e8) at thread/qthread_unix.cpp:331
#16 0xb30fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0xb770f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xa79bab70 (LWP 2092)):
#0  0xb7856424 in __kernel_vsyscall ()
#1  0xb770040e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2ff134b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2fe2896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2fe2f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xa82b5cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0xb30095f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb30fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0xb770f0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb1fc6b20 (LWP 2084)):
[KCrash Handler]
#7  isNull (this=0x3) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x3) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0xa8d4730) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0xb06ff662 in WindowTaskItem::publishIconGeometry (this=0xabd8fd0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0xb0710688 in AbstractTaskItem::timerEvent (this=0xabd8fd0, event=0xbfecc77c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0xb6544994 in QObject::event (this=0xabd8fd0, e=0xbfecc77c) at kernel/qobject.cpp:1181
#13 0xb6116bd4 in QGraphicsWidget::event (this=0xabd8fd0, event=0xbfecc77c) at graphicsview/qgraphicswidget.cpp:1455
#14 0xb5a57d54 in notify_helper (e=0xbfecc77c, receiver=0xabd8fd0, this=0xa0761c0) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0xa0761c0, receiver=0xabd8fd0, e=0xbfecc77c) at kernel/qapplication.cpp:4458
#16 0xb5a5d103 in QApplication::notify (this=0xbfecc77c, receiver=0xabd8fd0, e=0xbfecc77c) at kernel/qapplication.cpp:3886
#17 0xb6b91681 in KApplication::notify (this=0xa066ac0, receiver=0xabd8fd0, event=0xbfecc77c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0xb652c19e in QCoreApplication::notifyInternal (this=0xa066ac0, receiver=0xabd8fd0, event=0xbfecc77c) at kernel/qcoreapplication.cpp:787
#19 0xb655cc10 in sendEvent (event=0xbfecc77c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0xa074934) at kernel/qeventdispatcher_unix.cpp:603
#21 0xb655a155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0xa074968) at kernel/qeventdispatcher_glib.cpp:231
#23 0xb2fe225f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0xb2fe2990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0xb2fe2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb655aada in QEventDispatcherGlib::processEvents (this=0xa06eb10, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0xb5b0fe3a in QGuiEventDispatcherGlib::processEvents (this=0xa06eb10, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0xb652b1dd in QEventLoop::processEvents (this=0xbfecc9f4, flags=...) at kernel/qeventloop.cpp:149
#29 0xb652b421 in QEventLoop::exec (this=0xbfecc9f4, flags=...) at kernel/qeventloop.cpp:201
#30 0xb653019d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0xb5a558f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0xb780b18b in kdemain (argc=1, argv=0xbfeccbf4) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbfeccbf4) at plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 290101.

Possible duplicates by query: bug 290101, bug 290081, bug 290071, bug 290032, bug 290030.

Reported using DrKonqi