Bug 291889

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:
Clicked on a link in Thunderbird.  My default browser is set to Mozilla.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f942e7f57a0 (LWP 1586))]

Thread 4 (Thread 0x7f940e4b8700 (LWP 1631)):
#0  0x00007f94231661fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x24b8458) at pthread_mutex_unlock.c:290
#2  0x00007f9422656451 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f942b2bcf3e in QEventDispatcherGlib::processEvents (this=0x24b8340, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f942b290cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f942b290ef7 in QEventLoop::exec (this=0x7f940e4b7db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f942b1a827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f942b273cbf in QInotifyFileSystemWatcherEngine::run (this=0x24b6600) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f942b1aad05 in QThreadPrivate::start (arg=0x24b6600) at thread/qthread_unix.cpp:331
#9  0x00007f9423162efc in start_thread (arg=0x7f940e4b8700) at pthread_create.c:304
#10 0x00007f942e0d789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f94015b0700 (LWP 1655)):
#0  0x00007f9422655310 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f9422655e6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9422656792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f940208e516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f942267b2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9423162efc in start_thread (arg=0x7f94015b0700) at pthread_create.c:304
#6  0x00007f942e0d789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f93fafbf700 (LWP 1656)):
#0  0x00007f942e0cb773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f9422655f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f9422656429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f942b2bcf3e in QEventDispatcherGlib::processEvents (this=0x2e5e220, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f942b290cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f942b290ef7 in QEventLoop::exec (this=0x7f93fafbedb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f942b1a827f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f942b273cbf in QInotifyFileSystemWatcherEngine::run (this=0x2e65430) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f942b1aad05 in QThreadPrivate::start (arg=0x2e65430) at thread/qthread_unix.cpp:331
#9  0x00007f9423162efc in start_thread (arg=0x7f93fafbf700) at pthread_create.c:304
#10 0x00007f942e0d789d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f942e7f57a0 (LWP 1586)):
[KCrash Handler]
#6  isNull (this=0x4038000000000000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x4038000000000000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x420c930) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f9414c90112 in WindowTaskItem::publishIconGeometry (this=0x4096fe0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f9414c9eb7c in AbstractTaskItem::timerEvent (this=0x4096fe0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f942b2a8789 in QObject::event (this=0x4096fe0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f942ac6089b in QGraphicsWidget::event (this=0x4096fe0, event=0x7fffb3da0ef0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f942a642424 in notify_helper (e=0x7fffb3da0ef0, receiver=0x4096fe0, this=0x1b90340) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x1b90340, receiver=0x4096fe0, e=0x7fffb3da0ef0) at kernel/qapplication.cpp:4458
#15 0x00007f942a647291 in QApplication::notify (this=0x1b80480, receiver=0x4096fe0, e=0x7fffb3da0ef0) at kernel/qapplication.cpp:4365
#16 0x00007f942bf40126 in KApplication::notify (this=0x1b80480, receiver=0x4096fe0, event=0x7fffb3da0ef0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f942b291afc in QCoreApplication::notifyInternal (this=0x1b80480, receiver=0x4096fe0, event=0x7fffb3da0ef0) at kernel/qcoreapplication.cpp:787
#18 0x00007f942b2bed62 in sendEvent (event=0x7fffb3da0ef0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1b8f840) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f942b2bc514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f9422655a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f9422656258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f9422656429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f942b2bced6 in QEventDispatcherGlib::processEvents (this=0x1b20f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f942a6ea07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f942b290cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f942b290ef7 in QEventLoop::exec (this=0x7fffb3da1180, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f942b295789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f942e3d61a3 in kdemain (argc=1, argv=0x7fffb3da1568) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007f942e01730d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffb3da1568, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb3da1558) at libc-start.c:226
#31 0x0000000000400671 in _start ()

This bug may be a duplicate of or related to bug 272495.

Possible duplicates by query: bug 291884, bug 291860, bug 291854, bug 291848, bug 291787.

Reported using DrKonqi