Bug 355334

Application: plasmashell (5.4.90)
 (Compiled from sources)
Qt Version: 5.5.1
Operating System: Linux 4.2.5-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:

The volume control widget in the system tray had gone invisible (but still taking up space), as it often does (this time was when I disable bluetooth, but it also does it on startup). I right-clicked on the space where it should be, went to System Tray Settings, unselected it from the list and clicked apply. Then I re-selected it and pressed apply again, which is when Plasma crashed.

After Plasma restarted itself, the volume control was still invisible, and repeating the action caused it to crash again.

Debugging under gdb showed the following:

(gdb) frame 11
#11 0x00007f6efc693bae in QObjectPrivate::addConnection (this=0x3729050, signal=3, c=0x3b58550)
    at kernel/qobject.cpp:368
368         Q_ASSERT(c->sender == q_ptr);
(gdb) print c->sender
$1 = (QObject *) 0x375c850
(gdb) print q_ptr
$2 = (QObject *) 0x746f6d65522d616d

- Unusual behavior I noticed:

Invisible volume control in system tray.

NB: kmix is *not* running.

Also, I'm using Qt 5.5 from the dev branch: 3f9369be2d7a24babf3c4c336394afe1338bce19

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6f03450840 (LWP 728))]

Thread 8 (Thread 0x7f6eec770700 (LWP 742)):
#0  0x00007f6efb82018d in poll () from /usr/lib/libc.so.6
#1  0x00007f6f013feae2 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f6f01400757 in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f6eeee821e1 in QXcbEventReader::run (this=0x15c90d0) at qxcbconnection.cpp:1229
#4  0x00007f6efc434065 in QThreadPrivate::start (arg=0x15c90d0) at thread/qthread_unix.cpp:331
#5  0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 7 (Thread 0x7f6eea0d0700 (LWP 778)):
#0  0x00007f6ef75d95f0 in g_mutex_lock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f6ef7594ec0 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6edc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6eea0cfd20, flags=...) at kernel/qeventloop.cpp:128
#5  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6eea0cfd20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6efc42c814 in QThread::exec (this=0x16c5410) at thread/qthread.cpp:503
#7  0x00007f6efff58fc7 in QQmlThreadPrivate::run (this=0x16c5410) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f6efc434065 in QThreadPrivate::start (arg=0x16c5410) at thread/qthread_unix.cpp:331
#9  0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 6 (Thread 0x7f6edafe6700 (LWP 794)):
#0  0x00007f6efb82018d in poll () from /usr/lib/libc.so.6
#1  0x00007f6ef7594fbc in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6ed40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6edafe5d20, flags=...) at kernel/qeventloop.cpp:128
#5  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6edafe5d20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6efc42c814 in QThread::exec (this=0x17b4320) at thread/qthread.cpp:503
#7  0x00007f6efff58fc7 in QQmlThreadPrivate::run (this=0x17b4320) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f6efc434065 in QThreadPrivate::start (arg=0x17b4320) at thread/qthread_unix.cpp:331
#9  0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 5 (Thread 0x7f6ed95f0700 (LWP 796)):
#0  0x00007f6ef75d9614 in g_mutex_unlock () from /usr/lib/libglib-2.0.so.0
#1  0x00007f6ef7594540 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6ef7594eeb in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6ecc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6ed95efd20, flags=...) at kernel/qeventloop.cpp:128
#6  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6ed95efd20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f6efc42c814 in QThread::exec (this=0x1b18860) at thread/qthread.cpp:503
#8  0x00007f6efff58fc7 in QQmlThreadPrivate::run (this=0x1b18860) at qml/ftw/qqmlthread.cpp:141
#9  0x00007f6efc434065 in QThreadPrivate::start (arg=0x1b18860) at thread/qthread_unix.cpp:331
#10 0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f6ed1b10700 (LWP 1107)):
#0  0x00007f6efc407876 in QMutexLocker::QMutexLocker (this=0x7f6ed1b0f9e0, m=0x1d20a88) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:131
#1  0x00007f6efc6cfc7e in QThreadData::canWaitLocked (this=0x1d20a60) at ../../include/QtCore/5.5.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:240
#2  0x00007f6efc6d2c51 in postEventSourcePrepare (s=0x7f6e480012d0, timeout=0x7f6ed1b0fa24) at kernel/qeventdispatcher_glib.cpp:254
#3  0x00007f6efc6d2cca in postEventSourceCheck (source=0x7f6e480012d0) at kernel/qeventdispatcher_glib.cpp:264
#4  0x00007f6ef75949f1 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#5  0x00007f6ef7594f60 in ?? () from /usr/lib/libglib-2.0.so.0
#6  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#7  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6e480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#8  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6ed1b0fcb0, flags=...) at kernel/qeventloop.cpp:128
#9  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6ed1b0fcb0, flags=...) at kernel/qeventloop.cpp:204
#10 0x00007f6efc42c814 in QThread::exec (this=0x1c27ac0) at thread/qthread.cpp:503
#11 0x00007f6f00aad1e8 in QQuickPixmapReader::run (this=0x1c27ac0) at util/qquickpixmapcache.cpp:760
#12 0x00007f6efc434065 in QThreadPrivate::start (arg=0x1c27ac0) at thread/qthread_unix.cpp:331
#13 0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#14 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f6e385ac700 (LWP 1323)):
#0  0x00007f6ef7591fe7 in ?? () from /usr/lib/libglib-2.0.so.0
#1  0x00007f6ef759491a in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6ef7594f60 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6e300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6e385abcf0, flags=...) at kernel/qeventloop.cpp:128
#6  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6e385abcf0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f6efc42c814 in QThread::exec (this=0x3bfffa0) at thread/qthread.cpp:503
#8  0x00007f6e3ab0c9fb in KCupsConnection::run (this=0x3bfffa0) at /home/kde-devel/src/print-manager/libkcups/KCupsConnection.cpp:304
#9  0x00007f6efc434065 in QThreadPrivate::start (arg=0x3bfffa0) at thread/qthread_unix.cpp:331
#10 0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#11 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f6e2abde700 (LWP 9738)):
#0  0x00007f6efb82018d in poll () from /usr/lib/libc.so.6
#1  0x00007f6ef7594fbc in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007f6efc6d34fc in QEventDispatcherGlib::processEvents (this=0x7f6e24003280, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7f6e2abddd20, flags=...) at kernel/qeventloop.cpp:128
#5  0x00007f6efc65a17c in QEventLoop::exec (this=0x7f6e2abddd20, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6efc42c814 in QThread::exec (this=0x474f0b0) at thread/qthread.cpp:503
#7  0x00007f6efff58fc7 in QQmlThreadPrivate::run (this=0x474f0b0) at qml/ftw/qqmlthread.cpp:141
#8  0x00007f6efc434065 in QThreadPrivate::start (arg=0x474f0b0) at thread/qthread_unix.cpp:331
#9  0x00007f6efab414a4 in start_thread () from /usr/lib/libpthread.so.0
#10 0x00007f6efb82913d in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f6f03450840 (LWP 728)):
[KCrash Handler]
#6  0x00007f6efb7735f8 in raise () from /usr/lib/libc.so.6
#7  0x00007f6efb774a7a in abort () from /usr/lib/libc.so.6
#8  0x00007f6efc420291 in qt_message_fatal (context=..., message=...) at global/qlogging.cpp:1578
#9  0x00007f6efc41c95c in QMessageLogger::fatal (this=0x7ffd6f630690, msg=0x7f6efc73ccf0 "ASSERT: \"%s\" in file %s, line %d") at global/qlogging.cpp:781
#10 0x00007f6efc415b90 in qt_assert (assertion=0x7f6efc7fb2e1 "c->sender == q_ptr", file=0x7f6efc7fb207 "kernel/qobject.cpp", line=368) at global/qglobal.cpp:2966
#11 0x00007f6efc693bae in QObjectPrivate::addConnection (this=0x3729050, signal=3, c=0x3b58550) at kernel/qobject.cpp:368
#12 0x00007f6efc69dd77 in QObjectPrivate::connectImpl (sender=0x375c850, signal_index=3, receiver=0x38802d0, slot=0x7ffd6f630940, slotObj=0x370bf60, type=Qt::AutoConnection, types=0x0, senderMetaObject=0x7f6e41356520 <QPulseAudio::MapBaseQObject::staticMetaObject>) at kernel/qobject.cpp:4698
#13 0x00007f6efc69da21 in QObject::connectImpl (sender=0x375c850, signal=0x7ffd6f6308f0, receiver=0x38802d0, slot=0x7ffd6f630940, slotObj=0x370bf60, type=Qt::AutoConnection, types=0x0, senderMetaObject=0x7f6e41356520 <QPulseAudio::MapBaseQObject::staticMetaObject>) at kernel/qobject.cpp:4641
#14 0x00007f6e41136f96 in QObject::connect<void (QPulseAudio::MapBaseQObject::*)(unsigned int), void (QPulseAudio::AbstractModel::*)(unsigned int)> (sender=0x375c850, signal=(void (QPulseAudio::MapBaseQObject::*)(QPulseAudio::MapBaseQObject * const, unsigned int)) 0x7f6e41140846 <QPulseAudio::MapBaseQObject::added(unsigned int)>, receiver=0x38802d0, slot=&virtual table offset 368, type=Qt::AutoConnection) at /home/kde-devel/src/qt5/qtbase/src/corelib/kernel/qobject.h:239
#15 0x00007f6e411340a6 in QPulseAudio::AbstractModel::AbstractModel (this=0x38802d0, map=0x375c850, parent=0x0) at /home/kde-devel/src/plasma-pa/src/pulseaudio.cpp:226
#16 0x00007f6e41134978 in QPulseAudio::SourceModel::SourceModel (this=0x38802d0, parent=0x0) at /home/kde-devel/src/plasma-pa/src/pulseaudio.cpp:299
#17 0x00007f6e41369619 in QQmlPrivate::QQmlElement<QPulseAudio::SourceModel>::QQmlElement (this=0x38802d0) at /home/kde-devel/src/qt5/qtdeclarative/src/qml/qml/qqmlprivate.h:93
#18 0x00007f6e41369663 in QQmlPrivate::createInto<QPulseAudio::SourceModel> (memory=0x38802d0) at /home/kde-devel/src/qt5/qtdeclarative/src/qml/qml/qqmlprivate.h:102
#19 0x00007f6effecf76b in QQmlType::create (this=0x7f6ecc042ec0) at qml/qqmlmetatype.cpp:715
#20 0x00007f6efff519b5 in QQmlObjectCreator::createInstance (this=0x3f43820, index=25, parent=0x3af10e0, isContextObject=false) at qml/qqmlobjectcreator.cpp:1050
#21 0x00007f6efff4f9fa in QQmlObjectCreator::setPropertyBinding (this=0x3f43820, property=0x7f6ecc055e08, binding=0x7f6ecc55b14c) at qml/qqmlobjectcreator.cpp:751
#22 0x00007f6efff4f55c in QQmlObjectCreator::setupBindings (this=0x3f43820, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:710
#23 0x00007f6efff5328f in QQmlObjectCreator::populateInstance (this=0x3f43820, index=13, instance=0x4571760, bindingTarget=0x4571760, valueTypeProperty=0x0, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1321
#24 0x00007f6efff525a6 in QQmlObjectCreator::createInstance (this=0x3f43820, index=23, parent=0x4571760, isContextObject=false) at qml/qqmlobjectcreator.cpp:1169
#25 0x00007f6efff4f9fa in QQmlObjectCreator::setPropertyBinding (this=0x3f43820, property=0x7f6ecc021f78, binding=0x7f6ecc55ac14) at qml/qqmlobjectcreator.cpp:751
#26 0x00007f6efff4f55c in QQmlObjectCreator::setupBindings (this=0x3f43820, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:710
#27 0x00007f6efff5328f in QQmlObjectCreator::populateInstance (this=0x3f43820, index=11, instance=0x437c760, bindingTarget=0x437c760, valueTypeProperty=0x0, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1321
#28 0x00007f6efff525a6 in QQmlObjectCreator::createInstance (this=0x3f43820, index=13, parent=0x437c760, isContextObject=false) at qml/qqmlobjectcreator.cpp:1169
#29 0x00007f6efff4f9fa in QQmlObjectCreator::setPropertyBinding (this=0x3f43820, property=0x7f6ecc21ef28, binding=0x7f6ecc55aa2c) at qml/qqmlobjectcreator.cpp:751
#30 0x00007f6efff4f55c in QQmlObjectCreator::setupBindings (this=0x3f43820, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:710
#31 0x00007f6efff5328f in QQmlObjectCreator::populateInstance (this=0x3f43820, index=0, instance=0x44349d0, bindingTarget=0x44349d0, valueTypeProperty=0x0, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1321
#32 0x00007f6efff525a6 in QQmlObjectCreator::createInstance (this=0x3f43820, index=11, parent=0x44349d0, isContextObject=false) at qml/qqmlobjectcreator.cpp:1169
#33 0x00007f6efff4f9fa in QQmlObjectCreator::setPropertyBinding (this=0x3f43820, property=0x7f6ecc021f78, binding=0x7f6ecc55a14c) at qml/qqmlobjectcreator.cpp:751
#34 0x00007f6efff4f55c in QQmlObjectCreator::setupBindings (this=0x3f43820, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:710
#35 0x00007f6efff5328f in QQmlObjectCreator::populateInstance (this=0x3f43820, index=-1, instance=0x0, bindingTarget=0x7f6efbadeb98 <main_arena+88>, valueTypeProperty=0x0, bindingsToSkip=...) at qml/qqmlobjectcreator.cpp:1321
#36 0x00007f6efff525a6 in QQmlObjectCreator::createInstance (this=0x3f43820, index=0, parent=0x0, isContextObject=true) at qml/qqmlobjectcreator.cpp:1169
#37 0x00007f6efff4c5e6 in QQmlObjectCreator::create (this=0x3f43820, subComponentIndex=-1, parent=0x0, interrupt=0x7ffd6f633cb0) at qml/qqmlobjectcreator.cpp:209
#38 0x00007f6effec372e in QQmlIncubatorPrivate::incubate (this=0x59ae960, i=...) at qml/qqmlincubator.cpp:302
#39 0x00007f6effec3ce7 in QQmlIncubationController::incubateFor (this=0x1bdb080, msecs=10) at qml/qqmlincubator.cpp:395
#40 0x00007f6f00ef54a8 in KDeclarative::QmlObjectIncubationController::incubate (this=0x1bdb070) at /home/kde-devel/build/kdeclarative/src/kdeclarative/../../../../src/kdeclarative/src/kdeclarative/private/qmlobject_p.h:63
#41 0x00007f6f00ef5535 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged (this=0x1bdb070, count=1) at /home/kde-devel/build/kdeclarative/src/kdeclarative/../../../../src/kdeclarative/src/kdeclarative/private/qmlobject_p.h:79
#42 0x00007f6effec2e97 in QQmlEnginePrivate::incubate (this=0x1b479a0, i=..., forContext=0x36b7810) at qml/qqmlincubator.cpp:97
#43 0x00007f6effebf767 in QQmlComponent::create (this=0x47733f0, incubator=..., context=0x317d4a0, forContext=0x0) at qml/qqmlcomponent.cpp:1068
#44 0x00007f6f00ee1dcb in KDeclarative::QmlObject::completeInitialization (this=0x528b320, initialProperties=...) at /home/kde-devel/src/kdeclarative/src/kdeclarative/qmlobject.cpp:318
#45 0x00007f6f02fcb27d in PlasmaQuick::AppletQuickItem::init (this=0x3709570) at /home/kde-devel/src/plasma-framework/src/plasmaquick/appletquickitem.cpp:544
#46 0x00007f6ed9604a1f in AppletInterface::init (this=0x3709570) at /home/kde-devel/src/plasma-framework/src/scriptengines/qml/plasmoid/appletinterface.cpp:169
#47 0x00007f6ed9607594 in AppletInterface::qt_static_metacall (_o=0x3709570, _c=QMetaObject::InvokeMetaMethod, _id=22, _a=0x3684b40) at /home/kde-devel/build/plasma-framework/src/scriptengines/qml/moc_appletinterface.cpp:324
#48 0x00007f6efc6941f5 in QMetaCallEvent::placeMetaCall (this=0x3747970, object=0x3709570) at kernel/qobject.cpp:486
#49 0x00007f6efc695270 in QObject::event (this=0x3709570, e=0x3747970) at kernel/qobject.cpp:1239
#50 0x00007f6f00b74b60 in QQuickItem::event (this=0x3709570, ev=0x3747970) at items/qquickitem.cpp:7321
#51 0x00007f6ed9607065 in AppletInterface::event (this=0x3709570, event=0x3747970) at /home/kde-devel/src/plasma-framework/src/scriptengines/qml/plasmoid/appletinterface.cpp:699
#52 0x00007f6efd3e2616 in QApplicationPrivate::notify_helper (this=0x15b0bb0, receiver=0x3709570, e=0x3747970) at kernel/qapplication.cpp:3716
#53 0x00007f6efd3dfd75 in QApplication::notify (this=0x7ffd6f635450, receiver=0x3709570, e=0x3747970) at kernel/qapplication.cpp:3160
#54 0x00007f6efc65d2e6 in QCoreApplication::notifyInternal (this=0x7ffd6f635450, receiver=0x3709570, event=0x3747970) at kernel/qcoreapplication.cpp:965
#55 0x00007f6efc66101f in QCoreApplication::sendEvent (receiver=0x3709570, event=0x3747970) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#56 0x00007f6efc65e662 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x15a6520) at kernel/qcoreapplication.cpp:1593
#57 0x00007f6efc65dfe2 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1451
#58 0x00007f6efc6d2d10 in postEventSourceDispatch (s=0x15eb310) at kernel/qeventdispatcher_glib.cpp:271
#59 0x00007f6ef7594dc7 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#60 0x00007f6ef7595020 in ?? () from /usr/lib/libglib-2.0.so.0
#61 0x00007f6ef75950cc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#62 0x00007f6efc6d34cd in QEventDispatcherGlib::processEvents (this=0x15f9390, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#63 0x00007f6eeeec8fb8 in QPAEventDispatcherGlib::processEvents (this=0x15f9390, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:115
#64 0x00007f6efc659e80 in QEventLoop::processEvents (this=0x7ffd6f6352a0, flags=...) at kernel/qeventloop.cpp:128
#65 0x00007f6efc65a17c in QEventLoop::exec (this=0x7ffd6f6352a0, flags=...) at kernel/qeventloop.cpp:204
#66 0x00007f6efc65d9c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#67 0x00007f6efca60490 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1527
#68 0x00007f6efd3df74f in QApplication::exec () at kernel/qapplication.cpp:2976
#69 0x0000000000472a5a in main (argc=2, argv=0x7ffd6f635a68) at /home/kde-devel/src/plasma-workspace/shell/main.cpp:176

Possible duplicates by query: bug 354472, bug 349696, bug 348367, bug 347355, bug 346106.

Reported using DrKonqi