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 x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:

Very frequently plasma will crash when opening kdiff3 maximized.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f47545847c0 (LWP 20083))]

Thread 5 (Thread 0x7f4733163700 (LWP 20084)):
#0  0x00007f4753e63773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f47483edf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f47483ee429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4751054f3e in QEventDispatcherGlib::processEvents (this=0xfdc060, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f4751028cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4751028ef7 in QEventLoop::exec (this=0x7f4733162cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f4750f4027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f475100bcbf in QInotifyFileSystemWatcherEngine::run (this=0xfdb500) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f4750f42d05 in QThreadPrivate::start (arg=0xfdb500) at thread/qthread_unix.cpp:331
#9  0x00007f474570756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f4748efaefc in start_thread (arg=0x7f4733163700) at pthread_create.c:304
#11 0x00007f4753e6f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f472760f700 (LWP 20086)):
#0  0x00007f4748efd034 in __pthread_mutex_lock (mutex=0x16731d8) at pthread_mutex_lock.c:61
#1  0x00007f47483ed4ca in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f47483edf82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f47483ee429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4751054f3e in QEventDispatcherGlib::processEvents (this=0x1672cd0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f4751028cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f4751028ef7 in QEventLoop::exec (this=0x7f472760ecd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f4750f4027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f475100bcbf in QInotifyFileSystemWatcherEngine::run (this=0x1671f90) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f4750f42d05 in QThreadPrivate::start (arg=0x1671f90) at thread/qthread_unix.cpp:331
#10 0x00007f474570756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007f4748efaefc in start_thread (arg=0x7f472760f700) at pthread_create.c:304
#12 0x00007f4753e6f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f47243c0700 (LWP 20089)):
#0  0x00007f4748efd034 in __pthread_mutex_lock (mutex=0x7f472c015998) at pthread_mutex_lock.c:61
#1  0x00007f47483ed8c2 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f47483ee258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f47483ee792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f4724e9e516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007f47484132b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f474570756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#7  0x00007f4748efaefc in start_thread (arg=0x7f47243c0700) at pthread_create.c:304
#8  0x00007f4753e6f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#9  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f471ac2e700 (LWP 20092)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f474e059fe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f474e05a019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f474570756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007f4748efaefc in start_thread (arg=0x7f471ac2e700) at pthread_create.c:304
#5  0x00007f4753e6f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f47545847c0 (LWP 20083)):
[KCrash Handler]
#6  isNull (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x4d0000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x2bf33a0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f4739c72068 in WindowTaskItem::publishIconGeometry (this=0x282f9f0, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#10 0x00007f4739c81d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#11 0x00007f4739c81aa5 in publishIconGeometry (this=0x37b0a60) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#12 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#13 0x00007f4739c80b7c in AbstractTaskItem::timerEvent (this=0x37b0a60, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007f4751040789 in QObject::event (this=0x37b0a60, e=<optimized out>) at kernel/qobject.cpp:1181
#15 0x00007f47509f889b in QGraphicsWidget::event (this=0x37b0a60, event=0x7fffdb516c00) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007f47503da424 in notify_helper (e=0x7fffdb516c00, receiver=0x37b0a60, this=0x765d60) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x765d60, receiver=0x37b0a60, e=0x7fffdb516c00) at kernel/qapplication.cpp:4458
#18 0x00007f47503df291 in QApplication::notify (this=0x7483a0, receiver=0x37b0a60, e=0x7fffdb516c00) at kernel/qapplication.cpp:4365
#19 0x00007f4751cd8126 in KApplication::notify (this=0x7483a0, receiver=0x37b0a60, event=0x7fffdb516c00) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f4751029afc in QCoreApplication::notifyInternal (this=0x7483a0, receiver=0x37b0a60, event=0x7fffdb516c00) at kernel/qcoreapplication.cpp:787
#21 0x00007f4751056d62 in sendEvent (event=0x7fffdb516c00, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x7728f0) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f4751054514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 0x00007f47483eda5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f47483ee258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f47483ee429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f4751054ed6 in QEventDispatcherGlib::processEvents (this=0x6aff40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#28 0x00007f475048207e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007f4751028cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007f4751028ef7 in QEventLoop::exec (this=0x7fffdb516e90, flags=...) at kernel/qeventloop.cpp:201
#31 0x00007f475102d789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0x00007f475416e1a3 in kdemain (argc=1, argv=0x7fffdb517278) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x00007f4753daf30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffdb517278, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdb517268) at libc-start.c:226
#34 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291121, bug 291073, bug 291054, bug 291036, bug 291000.

Reported using DrKonqi