Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3) (Compiled from sources)
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: I was shutting down the computer. This is the same error as the one I had in my laptop, and my other desktop. Always the same problem whenever I install Kubuntu.

The crash can be reproduced every time.

-- Backtrace:
Application: Shell de escritorio Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f0202e847a0 (LWP 1744))]

Thread 4 (Thread 0x7f01e07df700 (LWP 1746)):
#0  0x00007f01ff957602 in socketNotifierSourceCheck (source=0x1303df0) at kernel/qeventdispatcher_glib.cpp:79
#1  0x00007f01f6cf0734 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f01f6cf0f82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f01f6cf1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f01ff957f3e in QEventDispatcherGlib::processEvents (this=0x13000e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f01ff92bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f01ff92bef7 in QEventLoop::exec (this=0x7f01e07dedb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f01ff84327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f01ff90ecbf in QInotifyFileSystemWatcherEngine::run (this=0x1302480) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f01ff845d05 in QThreadPrivate::start (arg=0x1302480) at thread/qthread_unix.cpp:331
#10 0x00007f01f77fdefc in start_thread (arg=0x7f01e07df700) at pthread_create.c:304
#11 0x00007f020277289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f01ddcd9700 (LWP 1747)):
#0  0x00007f01f78011fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x1517678) at pthread_mutex_unlock.c:290
#2  0x00007f01f6cf0f5c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f01f6cf1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f01ff957f3e in QEventDispatcherGlib::processEvents (this=0x1514640, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f01ff92bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f01ff92bef7 in QEventLoop::exec (this=0x7f01ddcd8db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f01ff84327f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f01ff90ecbf in QInotifyFileSystemWatcherEngine::run (this=0x1516980) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f01ff845d05 in QThreadPrivate::start (arg=0x1516980) at thread/qthread_unix.cpp:331
#10 0x00007f01f77fdefc in start_thread (arg=0x7f01ddcd9700) at pthread_create.c:304
#11 0x00007f020277289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f01d6a49700 (LWP 1753)):
#0  0x00007f01f780003e in __pthread_mutex_lock (mutex=0x1827b18) at pthread_mutex_lock.c:62
#1  0x00007f01f6cf075f in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f01f6cf0f82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f01f6cf1792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f01d7527516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#5  0x00007f01f6d162b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f01f77fdefc in start_thread (arg=0x7f01d6a49700) at pthread_create.c:304
#7  0x00007f020277289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0202e847a0 (LWP 1744)):
[KCrash Handler]
#6  isNull (this=0x1600000016) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x1600000016) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x1e04440) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f01e9f75112 in WindowTaskItem::publishIconGeometry (this=0x2537f20) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f01e9f83b7c in AbstractTaskItem::timerEvent (this=0x2537f20, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f01ff943789 in QObject::event (this=0x2537f20, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f01ff2fb89b in QGraphicsWidget::event (this=0x2537f20, event=0x7fffd18e4060) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f01fecdd424 in notify_helper (e=0x7fffd18e4060, receiver=0x2537f20, this=0xa5ef00) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0xa5ef00, receiver=0x2537f20, e=0x7fffd18e4060) at kernel/qapplication.cpp:4458
#15 0x00007f01fece2291 in QApplication::notify (this=0xa4f170, receiver=0x2537f20, e=0x7fffd18e4060) at kernel/qapplication.cpp:4365
#16 0x00007f02005db126 in KApplication::notify (this=0xa4f170, receiver=0x2537f20, event=0x7fffd18e4060) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f01ff92cafc in QCoreApplication::notifyInternal (this=0xa4f170, receiver=0x2537f20, event=0x7fffd18e4060) at kernel/qcoreapplication.cpp:787
#18 0x00007f01ff959d62 in sendEvent (event=0x7fffd18e4060, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0xa63430) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f01ff957538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f01f6cf0a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f01f6cf1258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f01f6cf1429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f01ff957ed6 in QEventDispatcherGlib::processEvents (this=0x9e7f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f01fed8507e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f01ff92bcf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f01ff92bef7 in QEventLoop::exec (this=0x7fffd18e42f0, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f01ff930789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f0202a711a3 in kdemain (argc=1, argv=0x7fffd18e46d8) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f02026b230d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffd18e46d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd18e46c8) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 289738, bug 289736, bug 289714, bug 289704, bug 289683.

Reported using DrKonqi