Bug 284392

Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.1 (4.7.1)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic i686
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Right click on desktop, select "Add panel", then select "Default panel". No crash if "Empty panel" is selected. Kubuntu runs in a virtualbox machine.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7803b20 (LWP 1404))]

Thread 5 (Thread 0xb18eeb70 (LWP 1408)):
#0  0x04c42d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x025a27d5 in do_gettime (frac=0xb18ee010, sec=0xb18ee008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x026754b6 in QTimerInfoList::updateCurrentTime (this=0x93800b4) at kernel/qeventdispatcher_unix.cpp:339
#4  0x0267580a in QTimerInfoList::timerWait (this=0x93800b4, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x02674053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xb18ee11c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x026740ed in timerSourcePrepare (source=0x9380080, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x017a188c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x017a2637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x017a2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x02674b37 in QEventDispatcherGlib::processEvents (this=0x9378350, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x026451dd in QEventLoop::processEvents (this=0xb18ee2a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x02645421 in QEventLoop::exec (this=0xb18ee2a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x0254890b in QThread::exec (this=0x9373790) at thread/qthread.cpp:498
#14 0x02625e2d in QInotifyFileSystemWatcherEngine::run (this=0x9373790) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x0254b7b3 in QThreadPrivate::start (arg=0x9373790) at thread/qthread_unix.cpp:331
#16 0x01744d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x003df0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 4 (Thread 0xb011db70 (LWP 1409)):
#0  0x04c42d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x025a27d5 in do_gettime (frac=0xb011d010, sec=0xb011d008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x026754b6 in QTimerInfoList::updateCurrentTime (this=0x9543554) at kernel/qeventdispatcher_unix.cpp:339
#4  0x0267580a in QTimerInfoList::timerWait (this=0x9543554, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x02674053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xb011d11c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x026740ed in timerSourcePrepare (source=0x9543520, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x017a188c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x017a2637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x017a2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x02674b37 in QEventDispatcherGlib::processEvents (this=0x94a80e0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x026451dd in QEventLoop::processEvents (this=0xb011d2a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x02645421 in QEventLoop::exec (this=0xb011d2a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x0254890b in QThread::exec (this=0x90d4e28) at thread/qthread.cpp:498
#14 0x02625e2d in QInotifyFileSystemWatcherEngine::run (this=0x90d4e28) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x0254b7b3 in QThreadPrivate::start (arg=0x90d4e28) at thread/qthread_unix.cpp:331
#16 0x01744d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x003df0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xae91ab70 (LWP 1415)):
#0  0x01747d44 in __pthread_mutex_unlock_usercnt () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x003ecf54 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#2  0x017a187f in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x017a2637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x017a2f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x046b6cea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x017c95f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x01744d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x003df0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xaf91cb70 (LWP 1675)):
#0  0x00c6f416 in __kernel_vsyscall ()
#1  0x01748a5c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x003eccfc in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x074579a9 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0x074579ef in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0x01744d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x003df0ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb7803b20 (LWP 1404)):
[KCrash Handler]
#7  0x03e81fe7 in QGraphicsLayoutItem::isLayout (this=0x8fdb880) at graphicsview/qgraphicslayoutitem.cpp:868
#8  0x03e80db2 in QGraphicsLayoutPrivate::activateRecursive (this=0x8f37390, item=0x8fdb880) at graphicsview/qgraphicslayout_p.cpp:181
#9  0x03e80df4 in QGraphicsLayoutPrivate::activateRecursive (this=0x8f37390, item=0x92f3ca8) at graphicsview/qgraphicslayout_p.cpp:194
#10 0x03e80766 in QGraphicsLayout::activate (this=0x92f3ca8) at graphicsview/qgraphicslayout.cpp:261
#11 0x03e80844 in QGraphicsLayout::widgetEvent (this=0x92f3ca8, e=0x939f6d0) at graphicsview/qgraphicslayout.cpp:389
#12 0x03ec4b9f in QGraphicsWidget::event (this=0x8f5ed00, event=0x939f6d0) at graphicsview/qgraphicswidget.cpp:1379
#13 0x03805d54 in notify_helper (e=0x939f6d0, receiver=0x8f5ed00, this=0x8cfe448) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x8cfe448, receiver=0x8f5ed00, e=0x939f6d0) at kernel/qapplication.cpp:4458
#15 0x0380b103 in QApplication::notify (this=0x939f6d0, receiver=0x8f5ed00, e=0x939f6d0) at kernel/qapplication.cpp:3886
#16 0x01080721 in KApplication::notify (this=0x8cf3618, receiver=0x8f5ed00, event=0x939f6d0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x0264619e in QCoreApplication::notifyInternal (this=0x8cf3618, receiver=0x8f5ed00, event=0x939f6d0) at kernel/qcoreapplication.cpp:787
#18 0x02649f93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8cb42e0) at kernel/qcoreapplication.cpp:1428
#20 0x0264a0ec in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1321
#21 0x026746a4 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#22 postEventSourceDispatch (s=0x8d01428) at kernel/qeventdispatcher_glib.cpp:277
#23 0x017a225f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x017a2990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x017a2c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x02674ada in QEventDispatcherGlib::processEvents (this=0x8cb5218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0x038bde3a in QGuiEventDispatcherGlib::processEvents (this=0x8cb5218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x026451dd in QEventLoop::processEvents (this=0xbfdc3414, flags=...) at kernel/qeventloop.cpp:149
#29 0x02645421 in QEventLoop::exec (this=0xbfdc3414, flags=...) at kernel/qeventloop.cpp:201
#30 0x0264a19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x038038f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0x002a718b in kdemain (argc=1, argv=0xbfdc3614) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbfdc3614) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 282758, bug 281595, bug 281291, bug 281228, bug 280173.

Reported using DrKonqi