Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-15-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed: I closed a Chrome window, and swap partition was active, i mean swapping was going on...

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f41489f67a0 (LWP 2194))]

Thread 4 (Thread 0x7f412259e700 (LWP 2195)):
#0  0x00007f413d387034 in __pthread_mutex_lock (mutex=0x25c7ca8) at pthread_mutex_lock.c:61
#1  0x00007f413c876839 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f413c877f9a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f413c878429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f41454def3e in QEventDispatcherGlib::processEvents (this=0x25c7210, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f41454b2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f41454b2ef7 in QEventLoop::exec (this=0x7f412259ddb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f41453ca27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f4145495cbf in QInotifyFileSystemWatcherEngine::run (this=0x25c5c20) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f41453ccd05 in QThreadPrivate::start (arg=0x25c5c20) at thread/qthread_unix.cpp:331
#10 0x00007f413d384efc in start_thread (arg=0x7f412259e700) at pthread_create.c:304
#11 0x00007f41482f989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f411b7fe700 (LWP 2200)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f4143986c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f4143986d59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f413d384efc in start_thread (arg=0x7f411b7fe700) at pthread_create.c:304
#4  0x00007f41482f989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f411affd700 (LWP 2201)):
#0  0x00007f41482ed773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f413c877f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f413c878429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f41454def3e in QEventDispatcherGlib::processEvents (this=0x2ae5ce0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f41454b2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f41454b2ef7 in QEventLoop::exec (this=0x7f411affcde0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f41453ca27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f41453ccd05 in QThreadPrivate::start (arg=0x2ae5510) at thread/qthread_unix.cpp:331
#8  0x00007f413d384efc in start_thread (arg=0x7f411affd700) at pthread_create.c:304
#9  0x00007f41482f989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f41489f67a0 (LWP 2194)):
[KCrash Handler]
#6  operator== (value=0, this=0x2303fe9e0d) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x38b9430) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x38b9430) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f412e649068 in WindowTaskItem::publishIconGeometry (this=0x4081120, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#11 0x00007f412e658d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#12 0x00007f412e658aa5 in publishIconGeometry (this=0x47774a0) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#13 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#14 0x00007f412e657b7c in AbstractTaskItem::timerEvent (this=0x47774a0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#15 0x00007f41454ca789 in QObject::event (this=0x47774a0, e=<optimized out>) at kernel/qobject.cpp:1181
#16 0x00007f4144e8289b in QGraphicsWidget::event (this=0x47774a0, event=0x7fff672bc4f0) at graphicsview/qgraphicswidget.cpp:1455
#17 0x00007f4144864424 in notify_helper (e=0x7fff672bc4f0, receiver=0x47774a0, this=0x1327690) at kernel/qapplication.cpp:4486
#18 QApplicationPrivate::notify_helper (this=0x1327690, receiver=0x47774a0, e=0x7fff672bc4f0) at kernel/qapplication.cpp:4458
#19 0x00007f4144869291 in QApplication::notify (this=0x1314fd0, receiver=0x47774a0, e=0x7fff672bc4f0) at kernel/qapplication.cpp:4365
#20 0x00007f4146162126 in KApplication::notify (this=0x1314fd0, receiver=0x47774a0, event=0x7fff672bc4f0) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f41454b3afc in QCoreApplication::notifyInternal (this=0x1314fd0, receiver=0x47774a0, event=0x7fff672bc4f0) at kernel/qcoreapplication.cpp:787
#22 0x00007f41454e0d62 in sendEvent (event=0x7fff672bc4f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QTimerInfoList::activateTimers (this=0x13248f0) at kernel/qeventdispatcher_unix.cpp:603
#24 0x00007f41454de514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#25 0x00007f413c877a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f413c878258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f413c878429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f41454deed6 in QEventDispatcherGlib::processEvents (this=0x12b3f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f414490c07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f41454b2cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f41454b2ef7 in QEventLoop::exec (this=0x7fff672bc780, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f41454b7789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x00007f41485f81a3 in kdemain (argc=1, argv=0x7fff672bcb68) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007f414823930d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff672bcb68, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff672bcb58) at libc-start.c:226
#35 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289985, bug 289940, bug 289826, bug 289676, bug 289669.

Reported using DrKonqi