Bug 290499

Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3) (Compiled from sources)
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:
Je naviguais entre les différentes fenêtres par un simple clic. 
Ni je ne minimisais ni ne fermais d'application.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb770eb20 (LWP 1656))]

Thread 6 (Thread 0xb158db70 (LWP 1658)):
#0  0x06415d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x0152e7d5 in do_gettime (frac=0xb158d010, sec=0xb158d008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x016014b6 in QTimerInfoList::updateCurrentTime (this=0x93c6eac) at kernel/qeventdispatcher_unix.cpp:339
#4  0x0160180a in QTimerInfoList::timerWait (this=0x93c6eac, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x01600053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xb158d11c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x016000ed in timerSourcePrepare (source=0x93c6e78, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x035eb88c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x035ec637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x035ecc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x01600b37 in QEventDispatcherGlib::processEvents (this=0x93c0310, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x015d11dd in QEventLoop::processEvents (this=0xb158d2a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x015d1421 in QEventLoop::exec (this=0xb158d2a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x014d490b in QThread::exec (this=0x93bdf20) at thread/qthread.cpp:498
#14 0x015b1e2d in QInotifyFileSystemWatcherEngine::run (this=0x93bdf20) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x014d77b3 in QThreadPrivate::start (arg=0x93bdf20) at thread/qthread_unix.cpp:331
#16 0x01449d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x004370ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 5 (Thread 0xafc91b70 (LWP 1659)):
#0  0x0144bdbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x00444f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x035ebceb in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x035ec8f0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x035ecc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x01600b37 in QEventDispatcherGlib::processEvents (this=0x8ea9818, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x015d11dd in QEventLoop::processEvents (this=0xafc912a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x015d1421 in QEventLoop::exec (this=0xafc912a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x014d490b in QThread::exec (this=0x8eab088) at thread/qthread.cpp:498
#9  0x015b1e2d in QInotifyFileSystemWatcherEngine::run (this=0x8eab088) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x014d77b3 in QThreadPrivate::start (arg=0x8eab088) at thread/qthread_unix.cpp:331
#11 0x01449d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x004370ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 4 (Thread 0xae46ab70 (LWP 1665)):
#0  0x0144bdbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x00444f14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x035ebb9b in g_main_context_query () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x035ec664 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x035ecf9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x061ffcea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x036135f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x01449d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x004370ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xad1d5b70 (LWP 1668)):
#0  0x00966416 in __kernel_vsyscall ()
#1  0x0144da5c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x00444cfc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x02737883 in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#4  0x0273799f in ?? () from /usr/lib/i386-linux-gnu/libQtWebKit.so.4
#5  0x01449d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x004370ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xac9d4b70 (LWP 1669)):
#0  0x06415d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x0152e7d5 in do_gettime (frac=0xac9d4060, sec=0xac9d4058) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x016014b6 in QTimerInfoList::updateCurrentTime (this=0xb0c08d7c) at kernel/qeventdispatcher_unix.cpp:339
#4  0x0160180a in QTimerInfoList::timerWait (this=0xb0c08d7c, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x01600053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xac9d414c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x035eb88c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x035ec637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x035ecc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x01600b37 in QEventDispatcherGlib::processEvents (this=0x984ec78, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#10 0x015d11dd in QEventLoop::processEvents (this=0xac9d42d0, flags=...) at kernel/qeventloop.cpp:149
#11 0x015d1421 in QEventLoop::exec (this=0xac9d42d0, flags=...) at kernel/qeventloop.cpp:201
#12 0x014d490b in QThread::exec (this=0x984e778) at thread/qthread.cpp:498
#13 0x014d49fb in QThread::run (this=0x984e778) at thread/qthread.cpp:565
#14 0x014d77b3 in QThreadPrivate::start (arg=0x984e778) at thread/qthread_unix.cpp:331
#15 0x01449d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#16 0x004370ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb770eb20 (LWP 1656)):
[KCrash Handler]
#7  isNull (this=0x33383539) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x33383539) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x9e9ce60) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x0530a662 in WindowTaskItem::publishIconGeometry (this=0x9bd4b50) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x0531b688 in AbstractTaskItem::timerEvent (this=0x9bd4b50, event=0xbfc4178c) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x015ea994 in QObject::event (this=0x9bd4b50, e=0xbfc4178c) at kernel/qobject.cpp:1181
#13 0x0458cbd4 in QGraphicsWidget::event (this=0x9bd4b50, event=0xbfc4178c) at graphicsview/qgraphicswidget.cpp:1455
#14 0x03ecdd54 in notify_helper (e=0xbfc4178c, receiver=0x9bd4b50, this=0x8c4fe80) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8c4fe80, receiver=0x9bd4b50, e=0xbfc4178c) at kernel/qapplication.cpp:4458
#16 0x03ed3103 in QApplication::notify (this=0xbfc4178c, receiver=0x9bd4b50, e=0xbfc4178c) at kernel/qapplication.cpp:3886
#17 0x01176681 in KApplication::notify (this=0x8c35df8, receiver=0x9bd4b50, event=0xbfc4178c) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x015d219e in QCoreApplication::notifyInternal (this=0x8c35df8, receiver=0x9bd4b50, event=0xbfc4178c) at kernel/qcoreapplication.cpp:787
#19 0x01602c10 in sendEvent (event=0xbfc4178c, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8c40bec) at kernel/qeventdispatcher_unix.cpp:603
#21 0x01600155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x8c4b108) at kernel/qeventdispatcher_glib.cpp:231
#23 0x035ec25f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x035ec990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x035ecc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x01600ada in QEventDispatcherGlib::processEvents (this=0x8bf3218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0x03f85e3a in QGuiEventDispatcherGlib::processEvents (this=0x8bf3218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x015d11dd in QEventLoop::processEvents (this=0xbfc41a04, flags=...) at kernel/qeventloop.cpp:149
#29 0x015d1421 in QEventLoop::exec (this=0xbfc41a04, flags=...) at kernel/qeventloop.cpp:201
#30 0x015d619d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x03ecb8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0x00e5b18b in kdemain (argc=1, argv=0xbfc41c04) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbfc41c04) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290453, bug 290449, bug 290427, bug 290414, bug 290372.

Reported using DrKonqi