Application: plasmashell (5.4.3)

Qt Version: 5.5.1
Operating System: Linux 4.2.6-300.fc23.x86_64 x86_64
Distribution: "Fedora release 23 (Twenty Three)"

-- Information about the crash:
- What I was doing when the application crashed:
I had just upgraded from Fedora 22 to Fedora 23, and my desktop settings were all out of whack. My desktop settings were mostly forgotten and I needed to set things back up.

As I was setting things back up, I kept trying to get the panels to move onto one of my two other screens, and after I finally managed to make them move, plasmashell starts crashing... repeatedly.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f21a5f85940 (LWP 3774))]

Thread 10 (Thread 0x7f2185ca5700 (LWP 3777)):
#0  0x00007f219d99ffdd in poll () at /lib64/libc.so.6
#1  0x00007f21a3e3a272 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f21a3e3bee7 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f2187c29da9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#6  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f217f1cd700 (LWP 3796)):
#0  0x00007f219d99ffdd in poll () at /lib64/libc.so.6
#1  0x00007f2198ad316c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f21a28c6b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f2175421700 (LWP 3798)):
#0  0x00007f219c64cb10 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f217cd25e3a in radeon_drm_cs_emit_ioctl () at /usr/lib64/dri/r600_dri.so
#2  0x00007f217cd25577 in impl_thrd_routine () at /usr/lib64/dri/r600_dri.so
#3  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#4  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f21730f6700 (LWP 3801)):
#0  0x00007f219d99ffdd in poll () at /lib64/libc.so.6
#1  0x00007f2198ad316c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f21a28c6b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f2171480700 (LWP 3804)):
#0  0x00007f2198ad26e4 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#1  0x00007f2198ad309b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f21a28c6b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f216b9c0700 (LWP 3805)):
#0  0x00007f219c64cb10 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f21a570c514 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f21a570c559 in  () at /lib64/libQt5Script.so.5
#3  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#4  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f20e3df9700 (LWP 3806)):
#0  0x00007f2198b17734 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f2198ad2700 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad309b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f21a34708d6 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#8  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#10 0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f20d4a38700 (LWP 3810)):
#0  0x00007f219d99ffdd in poll () at /lib64/libc.so.6
#1  0x00007f2198ad316c in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f20d666e3c7 in KCupsConnection::run() () at /lib64/libkcupslib.so
#7  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f20b33b5700 (LWP 3956)):
#0  0x00007f2198b17734 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f2198ad3161 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f219e7dff0b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f219e5a3424 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f21a28c6b45 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f219e5a83ce in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f219c64760a in start_thread () at /lib64/libpthread.so.0
#9  0x00007f219d9aba7d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f21a5f85940 (LWP 3774)):
[KCrash Handler]
#5  0x0000000000000040 in  ()
#6  0x00007f21a288e305 in QQmlPropertyData* qQmlPropertyCacheProperty<QV4::String const*>(QJSEngine*, QObject*, QV4::String const*, QQmlContextData*, QQmlPropertyData&) () at /lib64/libQt5Qml.so.5
#7  0x00007f21a2800acb in QV4::QObjectWrapper::findProperty(QV4::ExecutionEngine*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, QQmlPropertyData*) const () at /lib64/libQt5Qml.so.5
#8  0x00007f21a28074ea in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) () at /lib64/libQt5Qml.so.5
#9  0x00007f21a281910e in QV4::Runtime::getProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () at /lib64/libQt5Qml.so.5
#10 0x00007f20e2526847 in  ()
#11 0x0003000000000000 in  ()
#12 0xffffffffffffffff in  ()#13 0x0003000000000001 in  ()
#14 0x00007f2170481068 in  ()
#15 0x000055faa31691b0 in  ()
#16 0x00007f2170481060 in  ()
#17 0x00007f2170481058 in  ()
#18 0x00007f2170481060 in  ()
#19 0x000055faa31691b0 in  ()
#20 0x00007f21a27bbe3a in QV4::SimpleScriptFunction::call(QV4::Managed*, QV4::CallData*) () at /lib64/libQt5Qml.so.5
#21 0x00007f21a28abfef in QQmlJavaScriptExpression::evaluate(QQmlContextData*, QV4::Value const&, QV4::CallData*, bool*) () at /lib64/libQt5Qml.so.5
#22 0x00007f21a2852546 in QQmlBoundSignalExpression::evaluate(void**) () at /lib64/libQt5Qml.so.5
#23 0x00007f21a2852dfb in QQmlBoundSignal_callback(QQmlNotifierEndpoint*, void**) () at /lib64/libQt5Qml.so.5
#24 0x00007f21a288f4be in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib64/libQt5Qml.so.5
#25 0x00007f21a283208c in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib64/libQt5Qml.so.5
#26 0x00007f219e7b7bf0 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#27 0x00007f21a29226ba in QQmlTimer::event(QEvent*) () at /lib64/libQt5Qml.so.5
#28 0x00007f219fd3d41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#29 0x00007f219fd428e6 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#30 0x00007f219e78977b in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#31 0x00007f219e78bb76 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#32 0x00007f219e7dfae3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#33 0x00007f2198ad2e3a in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#34 0x00007f2198ad31d0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#35 0x00007f2198ad327c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#36 0x00007f219e7dfeef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#37 0x00007f219e786f0a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#38 0x00007f219e78efec in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#39 0x000055faa213f363 in main ()

Reported using DrKonqi