Bug 336165

Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.11.5
Qt Version: 4.8.5
Operating System: Linux 3.11.10-11-desktop x86_64
Distribution: "openSUSE 13.1 (Bottle) (x86_64)"

-- Information about the crash:
Admittedly, I haven't reviewed properly existing backtraces to verify that this is *not* a duplicate. Apologies for that, but it isn't so obvious to me.

System was running overnight with VmWare virtual machine, and chrome (streaming music). In A/M, system is sluggish (e.g., seeing issues with screen repainting in browser, lots of disk thrashing). 

Switched to console session (Alt-F2) : htop showed Kwin at 100% (if that is at all relevant). Switched back to GUI, and was in the process of closing all applications when desktop crashed. Didn't really do anything reconizably specific to trigger crash.

I've had more than one crash.  Syatem is somewhat memory constrained (4Gb RAM, but overcommitted).

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1b38f43780 (LWP 4810))]

Thread 13 (Thread 0x7f1b16dc5700 (LWP 4812)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b299f38cb in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f1b29cf1f00 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f1b299f3909 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#4  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 12 (Thread 0x7f1a868a4700 (LWP 4815)):
#0  0x00007f1b3655c99d in read () from /lib64/libc.so.6
#1  0x00007f1b25160eb1 in ?? () from /usr/lib64/tls/libnvidia-tls.so.331.79
#2  0x00007f1b334b05c0 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f1b3347112c in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f1b3347159b in ?? () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f1b3347170c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#6  0x00007f1b37bc3d76 in QEventDispatcherGlib::processEvents (this=0x7f1a780008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#7  0x00007f1b37b95d0f in QEventLoop::processEvents (this=this@entry=0x7f1a868a3e20, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f1b37b96005 in QEventLoop::exec (this=this@entry=0x7f1a868a3e20, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f1b37a94fef in QThread::exec (this=this@entry=0x2b18de0) at thread/qthread.cpp:536
#10 0x00007f1b37b77513 in QInotifyFileSystemWatcherEngine::run (this=0x2b18de0) at io/qfilesystemwatcher_inotify.cpp:256
#11 0x00007f1b37a9768f in QThreadPrivate::start (arg=0x2b18de0) at thread/qthread_unix.cpp:338
#12 0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#13 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 11 (Thread 0x7f1a7ffff700 (LWP 4816)):
#0  0x00007f1b3780693a in __lll_unlock_wake () from /lib64/libpthread.so.0
#1  0x00007f1b37803629 in _L_unlock_578 () from /lib64/libpthread.so.0
#2  0x00007f1b37803566 in __pthread_mutex_unlock_usercnt () from /lib64/libpthread.so.0
#3  0x00007f1b263262ba in ?? () from /usr/X11R6/lib64/libGL.so.1
#4  0x00007f1b2632834b in ?? () from /usr/X11R6/lib64/libGL.so.1
#5  0x00007f1b25160ef0 in ?? () from /usr/lib64/tls/libnvidia-tls.so.331.79
#6  0x00007f1b334b05c0 in ?? () from /usr/lib64/libglib-2.0.so.0
#7  0x00007f1b3347112c in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#8  0x00007f1b3347159b in ?? () from /usr/lib64/libglib-2.0.so.0
#9  0x00007f1b3347170c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f1b37bc3d76 in QEventDispatcherGlib::processEvents (this=0x7f1a740008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#11 0x00007f1b37b95d0f in QEventLoop::processEvents (this=this@entry=0x7f1a7fffee20, flags=...) at kernel/qeventloop.cpp:149
#12 0x00007f1b37b96005 in QEventLoop::exec (this=this@entry=0x7f1a7fffee20, flags=...) at kernel/qeventloop.cpp:204
#13 0x00007f1b37a94fef in QThread::exec (this=this@entry=0x2ffe4e0) at thread/qthread.cpp:536
#14 0x00007f1b37b77513 in QInotifyFileSystemWatcherEngine::run (this=0x2ffe4e0) at io/qfilesystemwatcher_inotify.cpp:256
#15 0x00007f1b37a9768f in QThreadPrivate::start (arg=0x2ffe4e0) at thread/qthread_unix.cpp:338
#16 0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#17 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 10 (Thread 0x7f1a734b2700 (LWP 4820)):
#0  0x00007f1b334b163b in g_private_get () from /usr/lib64/libglib-2.0.so.0
#1  0x00007f1b334964d0 in g_thread_self () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f1b3347073c in g_main_context_acquire () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f1b334714c5 in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f1b3347170c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f1b37bc3d76 in QEventDispatcherGlib::processEvents (this=0x7f1a6c0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#6  0x00007f1b37b95d0f in QEventLoop::processEvents (this=this@entry=0x7f1a734b1e20, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f1b37b96005 in QEventLoop::exec (this=this@entry=0x7f1a734b1e20, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f1b37a94fef in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#9  0x00007f1a7e50c297 in KCupsConnection::run() () from /usr/lib64/libkcupslib.so
#10 0x00007f1b37a9768f in QThreadPrivate::start (arg=0x3b534a0) at thread/qthread_unix.cpp:338
#11 0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#12 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 9 (Thread 0x7f1a6bfff700 (LWP 7036)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x575fcc0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x575fcc0, previous=0x338e0c0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x575fcc0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#6  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x575fcc0) at thread/qthread_unix.cpp:338
#7  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#8  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 8 (Thread 0x7f1a70b0e700 (LWP 7037)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x575b4d0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x575b4d0, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x575b4d0, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x575b4d0, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x575b4d0, previous=0x6866240) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#8  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x575b4d0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#9  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x575b4d0) at thread/qthread_unix.cpp:338
#10 0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#11 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f1a5ffff700 (LWP 7038)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x552fb40) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x552fb40, previous=0x65ed630) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x552fb40) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#6  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x552fb40) at thread/qthread_unix.cpp:338
#7  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#8  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f1a5f7fe700 (LWP 7039)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x5174b10) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x5174b10, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x5174b10, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x5174b10, previous=0x338e0c0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x5174b10) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#8  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x5174b10) at thread/qthread_unix.cpp:338
#9  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#10 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f1a5effd700 (LWP 7040)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x1bba240) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x1bba240, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x1bba240, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x1bba240, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#7  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x1bba240, previous=0x5917770) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#8  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x1bba240) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#9  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x1bba240) at thread/qthread_unix.cpp:338
#10 0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#11 0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f1a5dd23700 (LWP 7041)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x5792910) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x5792910, previous=0x66595c0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x5792910) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#6  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x5792910) at thread/qthread_unix.cpp:338
#7  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#8  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f1a5d522700 (LWP 7042)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x4ff4b70) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x4ff4b70, previous=0x0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c4924c in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x4ff4b70, previous=0x1f2e6c0) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:71
#6  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x4ff4b70) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#7  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x4ff4b70) at thread/qthread_unix.cpp:338
#8  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#9  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f1a5cd21700 (LWP 7043)):
#0  0x00007f1b378040af in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f1b37a97b66 in wait (time=18446744073709551615, this=0x2b87de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x2c385c8, mutex=0x2b54aa0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b28c4679c in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2c385a0, th=0x5107f90) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WeaverImpl.cpp:370
#4  0x00007f1b28c49233 in ThreadWeaver::WorkingHardState::applyForWork (this=0x2b55390, th=0x5107f90, previous=0x52bab90) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/WorkingHardState.cpp:68
#5  0x00007f1b28c47f4f in ThreadWeaver::Thread::run (this=0x5107f90) at /usr/src/debug/kdelibs-4.11.5/threadweaver/Weaver/Thread.cpp:98
#6  0x00007f1b37a9768f in QThreadPrivate::start (arg=0x5107f90) at thread/qthread_unix.cpp:338
#7  0x00007f1b378000db in start_thread () from /lib64/libpthread.so.0
#8  0x00007f1b3656990d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f1b38f43780 (LWP 4810)):
[KCrash Handler]
#6  QGraphicsItem::ungrabMouse (this=0x534b790) at graphicsview/qgraphicsitem.cpp:3530
#7  0x00007f1b372ded7f in QGraphicsScenePrivate::clearMouseGrabber (this=this@entry=0x1d61a80) at graphicsview/qgraphicsscene.cpp:1004
#8  0x00007f1b372e20dd in QGraphicsScenePrivate::sendMouseEvent (this=0x1d61a80, mouseEvent=0x7fff141f0760) at graphicsview/qgraphicsscene.cpp:1279
#9  0x00007f1b372eb586 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff141f0760) at graphicsview/qgraphicsscene.cpp:4102
#10 0x00007f1b372f73fc in QGraphicsScene::event (this=0x1f0cd70, event=0x7fff141f0760) at graphicsview/qgraphicsscene.cpp:3451
#11 0x00007f1b36d168ac in QApplicationPrivate::notify_helper (this=this@entry=0x1cbc480, receiver=receiver@entry=0x1f0cd70, e=e@entry=0x7fff141f0760) at kernel/qapplication.cpp:4562
#12 0x00007f1b36d1ce70 in QApplication::notify (this=this@entry=0x1c9c0d0, receiver=receiver@entry=0x1f0cd70, e=e@entry=0x7fff141f0760) at kernel/qapplication.cpp:4348
#13 0x00007f1b3893e18a in KApplication::notify (this=0x1c9c0d0, receiver=0x1f0cd70, event=0x7fff141f0760) at /usr/src/debug/kdelibs-4.11.5/kdeui/kernel/kapplication.cpp:311
#14 0x00007f1b37b970ad in QCoreApplication::notifyInternal (this=0x1c9c0d0, receiver=0x1f0cd70, event=event@entry=0x7fff141f0760) at kernel/qcoreapplication.cpp:949
#15 0x00007f1b36d15246 in sendSpontaneousEvent (event=event@entry=0x7fff141f0760, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:234
#16 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff141f0760) at kernel/qapplication.cpp:5560
#17 0x00007f1b3730c67c in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x3e32fb0, event=event@entry=0x7fff141f0db0) at graphicsview/qgraphicsview.cpp:646
#18 0x00007f1b3730d58a in QGraphicsView::mouseMoveEvent (this=0x3e32d00, event=0x7fff141f0db0) at graphicsview/qgraphicsview.cpp:3276
#19 0x00007f1b36d65f25 in QWidget::event (this=this@entry=0x3e32d00, event=event@entry=0x7fff141f0db0) at kernel/qwidget.cpp:8361
#20 0x00007f1b37102b6e in QFrame::event (this=0x3e32d00, e=0x7fff141f0db0) at widgets/qframe.cpp:557
#21 0x00007f1b3730ebd9 in QGraphicsView::viewportEvent (this=0x3e32d00, event=0x7fff141f0db0) at graphicsview/qgraphicsview.cpp:2866
#22 0x00007f1b37b97216 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1cbc480, receiver=receiver@entry=0x3e48680, event=event@entry=0x7fff141f0db0) at kernel/qcoreapplication.cpp:1059
#23 0x00007f1b36d1688c in QApplicationPrivate::notify_helper (this=this@entry=0x1cbc480, receiver=receiver@entry=0x3e48680, e=e@entry=0x7fff141f0db0) at kernel/qapplication.cpp:4558
#24 0x00007f1b36d1cfad in QApplication::notify (this=this@entry=0x1c9c0d0, receiver=receiver@entry=0x3e48680, e=e@entry=0x7fff141f0db0) at kernel/qapplication.cpp:4105
#25 0x00007f1b3893e18a in KApplication::notify (this=0x1c9c0d0, receiver=0x3e48680, event=0x7fff141f0db0) at /usr/src/debug/kdelibs-4.11.5/kdeui/kernel/kapplication.cpp:311
#26 0x00007f1b37b970ad in QCoreApplication::notifyInternal (this=0x1c9c0d0, receiver=receiver@entry=0x3e48680, event=event@entry=0x7fff141f0db0) at kernel/qcoreapplication.cpp:949
#27 0x00007f1b36d1c763 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#28 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x3e48680, event=event@entry=0x7fff141f0db0, alienWidget=alienWidget@entry=0x3e48680, nativeWidget=nativeWidget@entry=0x3e32d00, buttonDown=buttonDown@entry=0x7f1b377f4278 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3173
#29 0x00007f1b36d8df7b in QETWidget::translateMouseEvent (this=this@entry=0x3e32d00, event=event@entry=0x7fff141f1120) at kernel/qapplication_x11.cpp:4528
#30 0x00007f1b36d8c9ec in QApplication::x11ProcessEvent (this=0x1c9c0d0, event=event@entry=0x7fff141f1120) at kernel/qapplication_x11.cpp:3651
#31 0x00007f1b36db3882 in x11EventSourceDispatch (s=0x1cbaa70, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0x00007f1b33471316 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#33 0x00007f1b33471668 in ?? () from /usr/lib64/libglib-2.0.so.0
#34 0x00007f1b3347170c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#35 0x00007f1b37bc3d55 in QEventDispatcherGlib::processEvents (this=0x1cb98b0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#36 0x00007f1b36db3936 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007f1b37b95d0f in QEventLoop::processEvents (this=this@entry=0x7fff141f1500, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007f1b37b96005 in QEventLoop::exec (this=this@entry=0x7fff141f1500, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007f1b37b9b13b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#40 0x00007f1b36d1506c in QApplication::exec () at kernel/qapplication.cpp:3823
#41 0x00007f1b2105fc6c in kdemain (argc=1, argv=0x1b9e5b0) at /usr/src/debug/kde-workspace-4.11.9/plasma/desktop/shell/main.cpp:126
#42 0x000000000040879e in _start ()

Possible duplicates by query: bug 334959, bug 333651, bug 329895, bug 327737, bug 327686.

Reported using DrKonqi