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:

I had just started the m/c. It crashed soon after plasma desktop loaded. Happens almost every time when plasma starts.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78adb20 (LWP 1951))]

Thread 4 (Thread 0xb1780b70 (LWP 1954)):
#0  0x051fedbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x001eff14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x04d61eda in g_main_context_acquire () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x04d6356d in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x04d63c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x06d74b37 in QEventDispatcherGlib::processEvents (this=0x8897a80, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x06d451dd in QEventLoop::processEvents (this=0xb17802a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x06d45421 in QEventLoop::exec (this=0xb17802a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x06c4890b in QThread::exec (this=0x8895ba8) at thread/qthread.cpp:498
#9  0x06d25e2d in QInotifyFileSystemWatcherEngine::run (this=0x8895ba8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x06c4b7b3 in QThreadPrivate::start (arg=0x8895ba8) at thread/qthread_unix.cpp:331
#11 0x051fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x001e20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xafe77b70 (LWP 1955)):
#0  0x051fed9c in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x001eff14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x04d62117 in g_main_context_release () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x04d63906 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x04d63c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x06d74b37 in QEventDispatcherGlib::processEvents (this=0x8a73908, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x06d451dd in QEventLoop::processEvents (this=0xafe772a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x06d45421 in QEventLoop::exec (this=0xafe772a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x06c4890b in QThread::exec (this=0x83a15e0) at thread/qthread.cpp:498
#9  0x06d25e2d in QInotifyFileSystemWatcherEngine::run (this=0x83a15e0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x06c4b7b3 in QThreadPrivate::start (arg=0x83a15e0) at thread/qthread_unix.cpp:331
#11 0x051fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x001e20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xadbf5b70 (LWP 1965)):
#0  0x051fedbd in pthread_mutex_lock () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x001eff14 in pthread_mutex_lock () from /lib/i386-linux-gnu/libc.so.6
#2  0x04d62ceb in g_main_context_check () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x04d638f0 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x04d63f9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x066efcea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x04d8a5f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x051fcd31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#8  0x001e20ce in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb78adb20 (LWP 1951)):
[KCrash Handler]
#7  operator== (value=0, this=0x7) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#8  isNull (this=0x8d5e9b8) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#9  operator! (this=0x8d5e9b8) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#10 Plasma::Applet::extender (this=0x8df53d0) at ../../plasma/applet.cpp:776
#11 0x00481173 in Plasma::ExtenderItem::returnToSource (this=0x8df55e0) at ../../plasma/extenders/extenderitem.cpp:640
#12 0x004a9658 in Plasma::ExtenderApplet::~ExtenderApplet (this=0x872d698, __in_chrg=<optimized out>) at ../../plasma/private/extenderapplet.cpp:42
#13 0x004a96d2 in Plasma::ExtenderApplet::~ExtenderApplet (this=0x872d698, __in_chrg=<optimized out>) at ../../plasma/private/extenderapplet.cpp:45
#14 0x06d595f3 in qDeleteInEventHandler (o=0x872d698) at kernel/qobject.cpp:3986
#15 0x06d5eb80 in QObject::event (this=0x872d698, e=0x9388fa8) at kernel/qobject.cpp:1200
#16 0x019f5bd4 in QGraphicsWidget::event (this=0x872d698, event=0x9388fa8) at graphicsview/qgraphicswidget.cpp:1455
#17 0x01336d54 in notify_helper (e=0x9388fa8, receiver=0x872d698, this=0x8174b88) at kernel/qapplication.cpp:4486
#18 QApplicationPrivate::notify_helper (this=0x8174b88, receiver=0x872d698, e=0x9388fa8) at kernel/qapplication.cpp:4458
#19 0x0133c103 in QApplication::notify (this=0x9388fa8, receiver=0x872d698, e=0x9388fa8) at kernel/qapplication.cpp:3886
#20 0x00f8d681 in KApplication::notify (this=0x8166e38, receiver=0x872d698, event=0x9388fa8) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x06d4619e in QCoreApplication::notifyInternal (this=0x8166e38, receiver=0x872d698, event=0x9388fa8) at kernel/qcoreapplication.cpp:787
#22 0x06d49f93 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x81282e0) at kernel/qcoreapplication.cpp:1428
#24 0x06d4a0ec in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1321
#25 0x06d746a4 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#26 postEventSourceDispatch (s=0x8177888) at kernel/qeventdispatcher_glib.cpp:277
#27 0x04d6325f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#28 0x04d63990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#29 0x04d63c2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#30 0x06d74ada in QEventDispatcherGlib::processEvents (this=0x8129218, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#31 0x013eee3a in QGuiEventDispatcherGlib::processEvents (this=0x8129218, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#32 0x06d451dd in QEventLoop::processEvents (this=0xbfd42314, flags=...) at kernel/qeventloop.cpp:149
#33 0x06d45421 in QEventLoop::exec (this=0xbfd42314, flags=...) at kernel/qeventloop.cpp:201
#34 0x06d4a19d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#35 0x013348f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#36 0x00c5c18b in kdemain (argc=1, argv=0xbfd42514) at ../../../../plasma/desktop/shell/main.cpp:120
#37 0x0804850b in main (argc=1, argv=0xbfd42514) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 290686, bug 290664, bug 290597, bug 290581, bug 290505.

Reported using DrKonqi