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:
Using Firefox 8.0 and watching random website. Suddenly plasma crash.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fed0ce977a0 (LWP 1753))]

Thread 4 (Thread 0x7fece4feb700 (LWP 1778)):
#0  0x00007fed0c77f773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fed00d09f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fed00d0a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fed09970f3e in QEventDispatcherGlib::processEvents (this=0x136fea0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fed09944cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fed09944ef7 in QEventLoop::exec (this=0x7fece4feadb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fed0985c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fed09927cbf in QInotifyFileSystemWatcherEngine::run (this=0x13b8020) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fed0985ed05 in QThreadPrivate::start (arg=0x13b8020) at thread/qthread_unix.cpp:331
#9  0x00007fed01816efc in start_thread (arg=0x7fece4feb700) at pthread_create.c:304
#10 0x00007fed0c78b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fecdc01e700 (LWP 1780)):
#0  0x00007fed0c77f773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fed00d09f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fed00d0a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fed09970f3e in QEventDispatcherGlib::processEvents (this=0xfbe350, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fed09944cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fed09944ef7 in QEventLoop::exec (this=0x7fecdc01ddb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fed0985c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fed09927cbf in QInotifyFileSystemWatcherEngine::run (this=0xfcde90) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fed0985ed05 in QThreadPrivate::start (arg=0xfcde90) at thread/qthread_unix.cpp:331
#9  0x00007fed01816efc in start_thread (arg=0x7fecdc01e700) at pthread_create.c:304
#10 0x00007fed0c78b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fecda477700 (LWP 1782)):
#0  0x00007fed0c77f773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fed00d09f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fed00d0a792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fecdaf55516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fed00d2f2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fed01816efc in start_thread (arg=0x7fecda477700) at pthread_create.c:304
#6  0x00007fed0c78b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fed0ce977a0 (LWP 1753)):
[KCrash Handler]
#6  isNull (this=0x3500310000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x3500310000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x2633580) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007feceda19112 in WindowTaskItem::publishIconGeometry (this=0x24f6a50) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007feceda27b7c in AbstractTaskItem::timerEvent (this=0x24f6a50, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007fed0995c789 in QObject::event (this=0x24f6a50, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007fed0931489b in QGraphicsWidget::event (this=0x24f6a50, event=0x7fffdecc3810) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007fed08cf6424 in notify_helper (e=0x7fffdecc3810, receiver=0x24f6a50, this=0xcb1f00) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0xcb1f00, receiver=0x24f6a50, e=0x7fffdecc3810) at kernel/qapplication.cpp:4458
#15 0x00007fed08cfb291 in QApplication::notify (this=0xc948c0, receiver=0x24f6a50, e=0x7fffdecc3810) at kernel/qapplication.cpp:4365
#16 0x00007fed0a5f4126 in KApplication::notify (this=0xc948c0, receiver=0x24f6a50, event=0x7fffdecc3810) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fed09945afc in QCoreApplication::notifyInternal (this=0xc948c0, receiver=0x24f6a50, event=0x7fffdecc3810) at kernel/qcoreapplication.cpp:787
#18 0x00007fed09972d62 in sendEvent (event=0x7fffdecc3810, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0xcb0150) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007fed09970538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007fed00d09a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fed00d0a258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fed00d0a429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fed09970ed6 in QEventDispatcherGlib::processEvents (this=0xc36f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007fed08d9e07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007fed09944cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007fed09944ef7 in QEventLoop::exec (this=0x7fffdecc3aa0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007fed09949789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007fed0ca8a1a3 in kdemain (argc=1, argv=0x7fffdecc3e88) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007fed0c6cb30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffdecc3e88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffdecc3e78) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289952, bug 289940, bug 289873, bug 289826, bug 289757.

Reported using DrKonqi