Bug 291664

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:
Minimizing pidgin
- Unusual behavior I noticed:
Plasma crashes when minimizing windows or switching beetween them on taskbar.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f0f2ca617a0 (LWP 2097))]

Thread 3 (Thread 0x7f0f08b60700 (LWP 2100)):
#0  0x00007f0f208c93f5 in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0f208c9e6a in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0f208ca429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0f29530f3e in QEventDispatcherGlib::processEvents (this=0x2b69d70, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f0f29504cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0f29504ef7 in QEventLoop::exec (this=0x7f0f08b5fdb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f0f2941c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f0f294e7cbf in QInotifyFileSystemWatcherEngine::run (this=0x2b69150) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f0f2941ed05 in QThreadPrivate::start (arg=0x2b69150) at thread/qthread_unix.cpp:331
#9  0x00007f0f213d6efc in start_thread (arg=0x7f0f08b60700) at pthread_create.c:304
#10 0x00007f0f2c34b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f0f02db5700 (LWP 2101)):
#0  pthread_mutex_lock (mutex=0x2baf708) at forward.c:182
#1  0x00007f0f208c8649 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0f208c9d81 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0f208ca429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0f29530f3e in QEventDispatcherGlib::processEvents (this=0x2bad740, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f0f29504cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f0f29504ef7 in QEventLoop::exec (this=0x7f0f02db4db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f0f2941c27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f0f294e7cbf in QInotifyFileSystemWatcherEngine::run (this=0x2baabd0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f0f2941ed05 in QThreadPrivate::start (arg=0x2baabd0) at thread/qthread_unix.cpp:331
#10 0x00007f0f213d6efc in start_thread (arg=0x7f0f02db5700) at pthread_create.c:304
#11 0x00007f0f2c34b89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f0f2ca617a0 (LWP 2097)):
[KCrash Handler]
#6  isNull (this=0x3200310000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x3200310000) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x42438d0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f0f11af1112 in WindowTaskItem::publishIconGeometry (this=0x4260ba0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f0f11affb7c in AbstractTaskItem::timerEvent (this=0x4260ba0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f0f2951c789 in QObject::event (this=0x4260ba0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f0f28ed489b in QGraphicsWidget::event (this=0x4260ba0, event=0x7fff74257cd0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f0f288b6424 in notify_helper (e=0x7fff74257cd0, receiver=0x4260ba0, this=0x1ff57f0) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x1ff57f0, receiver=0x4260ba0, e=0x7fff74257cd0) at kernel/qapplication.cpp:4458
#15 0x00007f0f288bb291 in QApplication::notify (this=0x1feec10, receiver=0x4260ba0, e=0x7fff74257cd0) at kernel/qapplication.cpp:4365
#16 0x00007f0f2a1b4126 in KApplication::notify (this=0x1feec10, receiver=0x4260ba0, event=0x7fff74257cd0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f0f29505afc in QCoreApplication::notifyInternal (this=0x1feec10, receiver=0x4260ba0, event=0x7fff74257cd0) at kernel/qcoreapplication.cpp:787
#18 0x00007f0f29532d62 in sendEvent (event=0x7fff74257cd0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1ff8610) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f0f29530538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#22 0x00007f0f208c9a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f0f208ca258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f0f208ca429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f0f29530ed6 in QEventDispatcherGlib::processEvents (this=0x1f81f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x00007f0f2895e07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#27 0x00007f0f29504cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x00007f0f29504ef7 in QEventLoop::exec (this=0x7fff74257f60, flags=...) at kernel/qeventloop.cpp:201
#29 0x00007f0f29509789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x00007f0f2c64a1a3 in kdemain (argc=1, argv=0x7fff74258348) at ../../../../plasma/desktop/shell/main.cpp:120
#31 0x00007f0f2c28b30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff74258348, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff74258338) at libc-start.c:226
#32 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291642, bug 291620, bug 291619, bug 291610, bug 291600.

Reported using DrKonqi