Bug 287064

Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I was installing and setting up a printer in system settings printer configuration
application.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f74119537c0 (LWP 2017))]

Thread 3 (Thread 0x7f73ee5f0700 (LWP 2018)):
#0  0x00007f741122e773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f74057b8f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f74057b9429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f740e41ff3e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f740e3f3cf2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007f740e3f3ef7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007f740e30b27f in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f740e3d6cbf in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007f740e30dd05 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007f7402ad256c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007f74062c5efc in start_thread (arg=0x7f73ee5f0700) at pthread_create.c:304
#11 0x00007f741123a89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f73e4909700 (LWP 2029)):
#0  0x00007f741122e773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f74057b8f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f74057b9429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f740e41ff3e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f740e3f3cf2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007f740e3f3ef7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007f740e30b27f in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f740e3d6cbf in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007f740e30dd05 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007f7402ad256c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007f74062c5efc in start_thread (arg=0x7f73e4909700) at pthread_create.c:304
#11 0x00007f741123a89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f74119537c0 (LWP 2017)):
[KCrash Handler]
#6  isNull (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x0) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x20dc9b0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f73f4df0068 in WindowTaskItem::publishIconGeometry (this=0x4cf36a0, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#10 0x00007f73f4dffd24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#11 0x00007f73f4dffaa5 in publishIconGeometry (this=0x4cb5730) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#12 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#13 0x00007f73f4dfeb7c in AbstractTaskItem::timerEvent (this=0x4cb5730, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007f740e40b789 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#15 0x00007f740ddc389b in QGraphicsWidget::event (this=0x4cb5730, event=0x7fffcc4638e0) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007f740d7a5424 in notify_helper (e=0x7fffcc4638e0, receiver=0x4cb5730, this=0xbb61f0) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0xbb61f0, receiver=0x4cb5730, e=0x7fffcc4638e0) at kernel/qapplication.cpp:4458
#18 0x00007f740d7aa291 in QApplication::notify (this=0xb9a5e0, receiver=0x4cb5730, e=0x7fffcc4638e0) at kernel/qapplication.cpp:4365
#19 0x00007f740f0a3126 in KApplication::notify (this=0xb9a5e0, receiver=0x4cb5730, event=0x7fffcc4638e0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f740e3f4afc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007f740e421d62 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#22 0x00007f740e41f538 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#23 0x00007f74057b8a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f74057b9258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f74057b9429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f740e41fed6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#27 0x00007f740d84d07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f740e3f3cf2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007f740e3f3ef7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#30 0x00007f740e3f8789 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007f74115391a3 in kdemain (argc=1, argv=0x7fffcc463f58) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f741117a30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffcc463f58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcc463f48) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 287059, bug 287014, bug 286968, bug 286963, bug 286920.

Reported using DrKonqi