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: I had several odt files, but the system works.
The plasma program crashed when I send an email with Thunderbird. The plasma window manager crashed often when I send an email with Thunderbird.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe5032ba7a0 (LWP 1636))]

Thread 6 (Thread 0x7fe4e01b1700 (LWP 1638)):
#0  0x00007fe502b99773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe4f7123f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4f7124429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4ffd8af3e in QEventDispatcherGlib::processEvents (this=0x279f490, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fe4ffd5ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fe4ffd5eef7 in QEventLoop::exec (this=0x7fe4e01b0db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fe4ffc7627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fe4ffd41cbf in QInotifyFileSystemWatcherEngine::run (this=0x27ab730) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fe4ffc78d05 in QThreadPrivate::start (arg=0x27ab730) at thread/qthread_unix.cpp:331
#9  0x00007fe4f7c30efc in start_thread (arg=0x7fe4e01b1700) at pthread_create.c:304
#10 0x00007fe502ba589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fe4dd6d0700 (LWP 1639)):
#0  0x00007fe4f7c33034 in __pthread_mutex_lock (mutex=0x7fe4d8001018) at pthread_mutex_lock.c:61
#1  0x00007fe4f7122e5d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4f7123dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4f7124429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe4ffd8af3e in QEventDispatcherGlib::processEvents (this=0x29f61c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007fe4ffd5ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fe4ffd5eef7 in QEventLoop::exec (this=0x7fe4dd6cfdb0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007fe4ffc7627f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007fe4ffd41cbf in QInotifyFileSystemWatcherEngine::run (this=0x29f8660) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fe4ffc78d05 in QThreadPrivate::start (arg=0x29f8660) at thread/qthread_unix.cpp:331
#10 0x00007fe4f7c30efc in start_thread (arg=0x7fe4dd6d0700) at pthread_create.c:304
#11 0x00007fe502ba589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fe4d3a49700 (LWP 1647)):
#0  0x00007fe502b99773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe4f7123f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe4f7124792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe4d4527516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe4f71492b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe4f7c30efc in start_thread (arg=0x7fe4d3a49700) at pthread_create.c:304
#6  0x00007fe502ba589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fe4d2c22700 (LWP 1648)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe4fe232c2c in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fe4fe232d59 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fe4f7c30efc in start_thread (arg=0x7fe4d2c22700) at pthread_create.c:304
#4  0x00007fe502ba589d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fe4d2421700 (LWP 1649)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007fe4d2420b20 in ?? ()
#2  0x00007fffcd5967e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x7fe5032ba7a0 (LWP 1636)):
[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=0x3b7b360) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007fe4e9d92112 in WindowTaskItem::publishIconGeometry (this=0x2e82d90) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007fe4e9da0b7c in AbstractTaskItem::timerEvent (this=0x2e82d90, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007fe4ffd76789 in QObject::event (this=0x2e82d90, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007fe4ff72e89b in QGraphicsWidget::event (this=0x2e82d90, event=0x7fffcd4ffd10) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007fe4ff110424 in notify_helper (e=0x7fffcd4ffd10, receiver=0x2e82d90, this=0x19731e0) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x19731e0, receiver=0x2e82d90, e=0x7fffcd4ffd10) at kernel/qapplication.cpp:4458
#15 0x00007fe4ff115291 in QApplication::notify (this=0x1961fc0, receiver=0x2e82d90, e=0x7fffcd4ffd10) at kernel/qapplication.cpp:4365
#16 0x00007fe500a0e126 in KApplication::notify (this=0x1961fc0, receiver=0x2e82d90, event=0x7fffcd4ffd10) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fe4ffd5fafc in QCoreApplication::notifyInternal (this=0x1961fc0, receiver=0x2e82d90, event=0x7fffcd4ffd10) at kernel/qcoreapplication.cpp:787
#18 0x00007fe4ffd8cd62 in sendEvent (event=0x7fffcd4ffd10, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1978290) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007fe4ffd8a514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007fe4f7123a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fe4f7124258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fe4f7124429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fe4ffd8aed6 in QEventDispatcherGlib::processEvents (this=0x18f9f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007fe4ff1b807e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007fe4ffd5ecf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007fe4ffd5eef7 in QEventLoop::exec (this=0x7fffcd4fffa0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007fe4ffd63789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007fe502ea41a3 in kdemain (argc=1, argv=0x7fffcd500388) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007fe502ae530d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffcd500388, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcd500378) at libc-start.c:226
#31 0x0000000000400671 in _start ()

Possible duplicates by query: bug 292254, bug 292253, bug 292242, bug 292220, bug 292186.

Reported using DrKonqi