Bug 290674

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:
- What I was doing when the application crashed:
Starting a wx Python app under Kubuntu on Acer Aspire One. App runs OK on SUSE KDE

- Unusual behavior I noticed:
Menu bar on app did not initially appear and KDE panel vanished. After a second, the menu bar appeared in the app and shortly afterwards the KDE panel was restored. The Crash Reporter then popped up.

Everything restored itself without me restarting anything so only a slight nuisance

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76fab20 (LWP 1357))]

Thread 4 (Thread 0xb0813b70 (LWP 1461)):
#0  0x006b8f0f in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#1  0x018d1933 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0x018d1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x02419b37 in QEventDispatcherGlib::processEvents (this=0x987d240, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x023ea1dd in QEventLoop::processEvents (this=0xb08132a0, flags=...) at kernel/qeventloop.cpp:149
#5  0x023ea421 in QEventLoop::exec (this=0xb08132a0, flags=...) at kernel/qeventloop.cpp:201
#6  0x022ed90b in QThread::exec (this=0x9cd63d8) at thread/qthread.cpp:498
#7  0x023cae2d in QInotifyFileSystemWatcherEngine::run (this=0x9cd63d8) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x022f07b3 in QThreadPrivate::start (arg=0x9cd63d8) at thread/qthread_unix.cpp:331
#9  0x05385d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#10 0x006ab0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xaf480b70 (LWP 1464)):
#0  0x001f6416 in __kernel_vsyscall ()
#1  0x0069c40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x018e034b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x018d1896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x018d1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x02419b37 in QEventDispatcherGlib::processEvents (this=0xaff01fe0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x023ea1dd in QEventLoop::processEvents (this=0xaf4802a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x023ea421 in QEventLoop::exec (this=0xaf4802a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x022ed90b in QThread::exec (this=0x9eda5b0) at thread/qthread.cpp:498
#9  0x023cae2d in QInotifyFileSystemWatcherEngine::run (this=0x9eda5b0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x022f07b3 in QThreadPrivate::start (arg=0x9eda5b0) at thread/qthread_unix.cpp:331
#11 0x05385d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x006ab0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xadc7db70 (LWP 1474)):
#0  0x001f6416 in __kernel_vsyscall ()
#1  0x0069c40e in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0x018e034b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x018d1896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x018d1f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05741cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x018f85f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x05385d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x006ab0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb76fab20 (LWP 1357)):
[KCrash Handler]
#7  isNull (this=0xe) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0xe) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0xa8b0390) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x034f6662 in WindowTaskItem::publishIconGeometry (this=0xa765798) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x03507688 in AbstractTaskItem::timerEvent (this=0xa765798, event=0xbfdde59c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x02403994 in QObject::event (this=0xa765798, e=0xbfdde59c) at kernel/qobject.cpp:1181
#13 0x0670fbd4 in QGraphicsWidget::event (this=0xa765798, event=0xbfdde59c) at graphicsview/qgraphicswidget.cpp:1455
#14 0x06050d54 in notify_helper (e=0xbfdde59c, receiver=0xa765798, this=0x961df70) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x961df70, receiver=0xa765798, e=0xbfdde59c) at kernel/qapplication.cpp:4458
#16 0x06056103 in QApplication::notify (this=0xbfdde59c, receiver=0xa765798, e=0xbfdde59c) at kernel/qapplication.cpp:3886
#17 0x011d2681 in KApplication::notify (this=0x960d128, receiver=0xa765798, event=0xbfdde59c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x023eb19e in QCoreApplication::notifyInternal (this=0x960d128, receiver=0xa765798, event=0xbfdde59c) at kernel/qcoreapplication.cpp:787
#19 0x0241bc10 in sendEvent (event=0xbfdde59c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x9624b9c) at kernel/qeventdispatcher_unix.cpp:603
#21 0x02419155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x9625000) at kernel/qeventdispatcher_glib.cpp:231
#23 0x018d125f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x018d1990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x018d1c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x02419b37 in QEventDispatcherGlib::processEvents (this=0x95cd218, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#27 0x06108e3a in QGuiEventDispatcherGlib::processEvents (this=0x95cd218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x023ea1dd in QEventLoop::processEvents (this=0xbfdde814, flags=...) at kernel/qeventloop.cpp:149
#29 0x023ea421 in QEventLoop::exec (this=0xbfdde814, flags=...) at kernel/qeventloop.cpp:201
#30 0x023ef19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x0604e8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0x00fa218b in kdemain (argc=1, argv=0xbfddea14) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbfddea14) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290672, bug 290664, bug 290654, bug 290641, bug 290635.

Reported using DrKonqi