Bug 291577

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 clicked on the ocular-icon to maximize the window. After this, the shell crashed immediately and restores itself.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f6389ad77a0 (LWP 1542))]

Thread 8 (Thread 0x7f63670ab700 (LWP 1571)):
#0  __pthread_getspecific (key=1) at pthread_getspecific.c:32
#1  0x00007f637d95e3dd in g_thread_self () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f637d938419 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f638659ef3e in QEventDispatcherGlib::processEvents (this=0x1f5e0d0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f6386572cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6386572ef7 in QEventLoop::exec (this=0x7f63670aadb0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f638648a27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f6386555cbf in QInotifyFileSystemWatcherEngine::run (this=0x1f5dfc0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f638648cd05 in QThreadPrivate::start (arg=0x1f5dfc0) at thread/qthread_unix.cpp:331
#9  0x00007f637e444efc in start_thread (arg=0x7f63670ab700) at pthread_create.c:304
#10 0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f635ffff700 (LWP 1572)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f635fffead0 in ?? ()
#2  0x00007fff0f7ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 6 (Thread 0x7f635d3f4700 (LWP 1578)):
#0  0x00007f63893ad773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f637d937f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f637d938792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f635ded2516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f637d95d2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f637e444efc in start_thread (arg=0x7f635d3f4700) at pthread_create.c:304
#6  0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f6358f1d700 (LWP 3807)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f638648d1ab in wait (time=18446744073709551615, this=0x1fbfff0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1fc0080, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6382287864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x20525a0, th=0x25977a0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6382289e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x25977a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6382289e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x25977a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007f6382289e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x25977a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007f6382288ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f6358f1ce00, parent=0x20525a0, th=0x25977a0) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007f6382288d5b in ThreadWeaver::Thread::run (this=0x25977a0) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007f638648cd05 in QThreadPrivate::start (arg=0x25977a0) at thread/qthread_unix.cpp:331
#10 0x00007f637e444efc in start_thread (arg=0x7f6358f1d700) at pthread_create.c:304
#11 0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f635f7fe700 (LWP 3808)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f638648d1ab in wait (time=18446744073709551615, this=0x1fbfff0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1fc0080, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6382287864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x20525a0, th=0x38e9280) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6382289e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x38e9280) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6382288ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f635f7fde00, parent=0x20525a0, th=0x38e9280) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6382288d5b in ThreadWeaver::Thread::run (this=0x38e9280) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f638648cd05 in QThreadPrivate::start (arg=0x38e9280) at thread/qthread_unix.cpp:331
#8  0x00007f637e444efc in start_thread (arg=0x7f635f7fe700) at pthread_create.c:304
#9  0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f635dbf5700 (LWP 3809)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f638648d1ab in wait (time=18446744073709551615, this=0x1fbfff0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1fc0080, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6382287864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x20525a0, th=0x2f6e570) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6382289e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x2f6e570) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6382288ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f635dbf4e00, parent=0x20525a0, th=0x2f6e570) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6382288d5b in ThreadWeaver::Thread::run (this=0x2f6e570) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f638648cd05 in QThreadPrivate::start (arg=0x2f6e570) at thread/qthread_unix.cpp:331
#8  0x00007f637e444efc in start_thread (arg=0x7f635dbf5700) at pthread_create.c:304
#9  0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6355300700 (LWP 3810)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f638648d1ab in wait (time=18446744073709551615, this=0x1fbfff0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1fc0080, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f6382287864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x20525a0, th=0x2f38f60) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f6382289e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fbeb80, th=0x2f38f60) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f6382288ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f63552ffe00, parent=0x20525a0, th=0x2f38f60) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f6382288d5b in ThreadWeaver::Thread::run (this=0x2f38f60) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f638648cd05 in QThreadPrivate::start (arg=0x2f38f60) at thread/qthread_unix.cpp:331
#8  0x00007f637e444efc in start_thread (arg=0x7f6355300700) at pthread_create.c:304
#9  0x00007f63893b989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6389ad77a0 (LWP 1542)):
[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=0x374e320) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f636fc0c112 in WindowTaskItem::publishIconGeometry (this=0x393a4a0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007f636fc1ab7c in AbstractTaskItem::timerEvent (this=0x393a4a0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007f638658a789 in QObject::event (this=0x393a4a0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f6385f4289b in QGraphicsWidget::event (this=0x393a4a0, event=0x7fff0f736e50) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007f6385924424 in notify_helper (e=0x7fff0f736e50, receiver=0x393a4a0, this=0x155f440) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x155f440, receiver=0x393a4a0, e=0x7fff0f736e50) at kernel/qapplication.cpp:4458
#15 0x00007f6385929291 in QApplication::notify (this=0x15526c0, receiver=0x393a4a0, e=0x7fff0f736e50) at kernel/qapplication.cpp:4365
#16 0x00007f6387222126 in KApplication::notify (this=0x15526c0, receiver=0x393a4a0, event=0x7fff0f736e50) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f6386573afc in QCoreApplication::notifyInternal (this=0x15526c0, receiver=0x393a4a0, event=0x7fff0f736e50) at kernel/qcoreapplication.cpp:787
#18 0x00007f63865a0d62 in sendEvent (event=0x7fff0f736e50, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x1564220) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007f638659e514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007f637d937a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f637d938258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f637d938429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f638659eed6 in QEventDispatcherGlib::processEvents (this=0x14f3f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007f63859cc07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f6386572cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f6386572ef7 in QEventLoop::exec (this=0x7fff0f7370e0, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007f6386577789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007f63896b81a3 in kdemain (argc=1, argv=0x7fff0f7374c8) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007f63892f930d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff0f7374c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0f7374b8) at libc-start.c:226
#31 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291569, bug 291555, bug 291530, bug 291511, bug 291510.

Reported using DrKonqi