Bug 288630

Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I have just pressed send in Thunderbird when I received the notice Plasma crashed. Other programs which are open are:
Google-Chrome 15 stable,
2 Konsoles
Dolphin
After sending the mail, the window closed and I saw a Google-Chrome webpage which was the front window.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f49f42127a0 (LWP 1680))]

Thread 6 (Thread 0x7f49d3eda700 (LWP 1681)):
#0  0x00007f49f3af1773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f49e807bf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f49e807c429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f49f0ce2f3e in QEventDispatcherGlib::processEvents (this=0x2d5ae90, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f49f0cb6cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f49f0cb6ef7 in QEventLoop::exec (this=0x7f49d3ed9db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f49f0bce27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f49f0c99cbf in QInotifyFileSystemWatcherEngine::run (this=0x2d59750) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f49f0bd0d05 in QThreadPrivate::start (arg=0x2d59750) at thread/qthread_unix.cpp:331
#9  0x00007f49e8b88efc in start_thread (arg=0x7f49d3eda700) at pthread_create.c:304
#10 0x00007f49f3afd89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f49c92a8700 (LWP 1682)):
#0  0x00007f49e8b8c1fd in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x3217a88) at pthread_mutex_unlock.c:290
#2  0x00007f49e807afe4 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f49e807bdfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f49e807c429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f49f0ce2f3e in QEventDispatcherGlib::processEvents (this=0x32179f0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f49f0cb6cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f49f0cb6ef7 in QEventLoop::exec (this=0x7f49c92a7db0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f49f0bce27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x00007f49f0c99cbf in QInotifyFileSystemWatcherEngine::run (this=0x3216f00) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f49f0bd0d05 in QThreadPrivate::start (arg=0x3216f00) at thread/qthread_unix.cpp:331
#11 0x00007f49e8b88efc in start_thread (arg=0x7f49c92a8700) at pthread_create.c:304
#12 0x00007f49f3afd89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f49c372c700 (LWP 1690)):
#0  0x00007f49f3af1773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f49e807bf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f49e807c792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f49c420a516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f49e80a12b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f49e8b88efc in start_thread (arg=0x7f49c372c700) at pthread_create.c:304
#6  0x00007f49f3afd89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f49b8e4d700 (LWP 1693)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f49ef18ac2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f49ef18ad59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f49e8b88efc in start_thread (arg=0x7f49b8e4d700) at pthread_create.c:304
#4  0x00007f49f3afd89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f49b8534700 (LWP 1694)):
#0  0x00007f49f3af1773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f49e807bf68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f49e807c429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f49f0ce2f3e in QEventDispatcherGlib::processEvents (this=0x3bf6bd0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f49f0cb6cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f49f0cb6ef7 in QEventLoop::exec (this=0x7f49b8533de0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f49f0bce27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f49f0bd0d05 in QThreadPrivate::start (arg=0x3b9ebf0) at thread/qthread_unix.cpp:331
#8  0x00007f49e8b88efc in start_thread (arg=0x7f49b8534700) at pthread_create.c:304
#9  0x00007f49f3afd89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f49f42127a0 (LWP 1680)):
[KCrash Handler]
#6  isNull (this=0x1000000001b) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x1000000001b) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x34895e0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f49da6bc112 in WindowTaskItem::publishIconGeometry (this=0x4587600) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f49da6cab7c in AbstractTaskItem::timerEvent (this=0x4587600, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f49f0cce789 in QObject::event (this=0x4587600, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f49f068689b in QGraphicsWidget::event (this=0x4587600, event=0x7fffcb6c2c30) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f49f0068424 in notify_helper (e=0x7fffcb6c2c30, receiver=0x4587600, this=0x25e7690) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x25e7690, receiver=0x4587600, e=0x7fffcb6c2c30) at kernel/qapplication.cpp:4458
#15 0x00007f49f006d291 in QApplication::notify (this=0x25c1330, receiver=0x4587600, e=0x7fffcb6c2c30) at kernel/qapplication.cpp:4365
#16 0x00007f49f1966126 in KApplication::notify (this=0x25c1330, receiver=0x4587600, event=0x7fffcb6c2c30) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f49f0cb7afc in QCoreApplication::notifyInternal (this=0x25c1330, receiver=0x4587600, event=0x7fffcb6c2c30) at kernel/qcoreapplication.cpp:787
#18 0x00007f49f0ce4d62 in sendEvent (event=0x7fffcb6c2c30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x25e5710) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f49f0ce2514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f49e807ba5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f49e807c258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f49e807c429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f49f0ce2ed6 in QEventDispatcherGlib::processEvents (this=0x2568f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f49f011007e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f49f0cb6cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f49f0cb6ef7 in QEventLoop::exec (this=0x7fffcb6c2ec0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f49f0cbb789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f49f3dfc1a3 in kdemain (argc=1, argv=0x7fffcb6c32a8) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007f49f3a3d30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffcb6c32a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcb6c3298) 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 288601, bug 288553, bug 288525, bug 288518, bug 288468.

Reported using DrKonqi