Bug 363661

Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-22-generic i686
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Trying to connect with a VPN.  A believe it occurs when the kwallet is open to take the password.

- Unusual behavior I noticed:
The botton bar becames black and returns after a few seconds.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1af2800 (LWP 2495))]

Thread 8 (Thread 0xb16b8b40 (LWP 2503)):
#0  0xb772cc31 in __kernel_vsyscall ()
#1  0xb4d4ef8f in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0xb70c541d in ?? () from /usr/lib/i386-linux-gnu/libxcb.so.1
#3  0xb70c759b in xcb_wait_for_event () from /usr/lib/i386-linux-gnu/libxcb.so.1
#4  0xb17f0273 in QXcbEventReader::run (this=0x8dfbd40) at qxcbconnection.cpp:1253
#5  0xb502c43b in QThreadPrivate::start (arg=0x8dfbd40) at thread/qthread_unix.cpp:331
#6  0xb4c012b5 in start_thread (arg=0xb16b8b40) at pthread_create.c:333
#7  0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 7 (Thread 0xb0130b40 (LWP 2509)):
#0  0xb772cc31 in __kernel_vsyscall ()
#1  0xb4d4ef8f in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0xb43fca60 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb43ee05c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb525bb14 in QEventDispatcherGlib::processEvents (this=0xaf800470, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0xb5200953 in QEventLoop::processEvents (this=0xb01301d4, flags=...) at kernel/qeventloop.cpp:128
#7  0xb5200daa in QEventLoop::exec (this=0xb01301d4, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5026f1d in QThread::exec (this=0x8e8ddf0) at thread/qthread.cpp:503
#9  0xb6897aff in QQmlThreadPrivate::run (this=0x8e8ddf0) at qml/ftw/qqmlthread.cpp:141
#10 0xb502c43b in QThreadPrivate::start (arg=0x8e8ddf0) at thread/qthread_unix.cpp:331
#11 0xb4c012b5 in start_thread (arg=0xb0130b40) at pthread_create.c:333
#12 0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 6 (Thread 0xace8eb40 (LWP 2527)):
#0  qt_gettime () at tools/qelapsedtimer_unix.cpp:163
#1  0xb52593e2 in QTimerInfoList::updateCurrentTime (this=0xac50289c) at kernel/qtimerinfo_unix.cpp:84
#2  0xb5259904 in QTimerInfoList::timerWait (this=0xac50289c, tm=...) at kernel/qtimerinfo_unix.cpp:381
#3  0xb525aec9 in timerSourcePrepareHelper (timeout=0xace8e038, src=0xac502868) at kernel/qeventdispatcher_glib.cpp:127
#4  timerSourcePrepare (source=0xac502868, timeout=0xace8e038) at kernel/qeventdispatcher_glib.cpp:160
#5  0xb43ed51b in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#6  0xb43edf64 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb525bb14 in QEventDispatcherGlib::processEvents (this=0xac500470, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#9  0xb5200953 in QEventLoop::processEvents (this=0xace8e1d4, flags=...) at kernel/qeventloop.cpp:128
#10 0xb5200daa in QEventLoop::exec (this=0xace8e1d4, flags=...) at kernel/qeventloop.cpp:204
#11 0xb5026f1d in QThread::exec (this=0x9095620) at thread/qthread.cpp:503
#12 0xb6897aff in QQmlThreadPrivate::run (this=0x9095620) at qml/ftw/qqmlthread.cpp:141
#13 0xb502c43b in QThreadPrivate::start (arg=0x9095620) at thread/qthread_unix.cpp:331
#14 0xb4c012b5 in start_thread (arg=0xace8eb40) at pthread_create.c:333
#15 0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 5 (Thread 0xabaf8b40 (LWP 2533)):
#0  0xb43ed4ee in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb43edf64 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb525bb14 in QEventDispatcherGlib::processEvents (this=0xab100470, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0xb5200953 in QEventLoop::processEvents (this=0xabaf81d4, flags=...) at kernel/qeventloop.cpp:128
#5  0xb5200daa in QEventLoop::exec (this=0xabaf81d4, flags=...) at kernel/qeventloop.cpp:204
#6  0xb5026f1d in QThread::exec (this=0x914ecf0) at thread/qthread.cpp:503
#7  0xb6897aff in QQmlThreadPrivate::run (this=0x914ecf0) at qml/ftw/qqmlthread.cpp:141
#8  0xb502c43b in QThreadPrivate::start (arg=0x914ecf0) at thread/qthread_unix.cpp:331
#9  0xb4c012b5 in start_thread (arg=0xabaf8b40) at pthread_create.c:333
#10 0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 4 (Thread 0xaa89db40 (LWP 2543)):
#0  0xb772cc31 in __kernel_vsyscall ()
#1  0xb4c06a8c in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/i386/pthread_cond_wait.S:187
#2  0xb4d658cd in __pthread_cond_wait (cond=0xb76918d0, mutex=0xb76918b8) at forward.c:149
#3  0xb7559a2c in ?? () from /usr/lib/i386-linux-gnu/libQt5Script.so.5
#4  0xb7559a6c in ?? () from /usr/lib/i386-linux-gnu/libQt5Script.so.5
#5  0xb4c012b5 in start_thread (arg=0xaa89db40) at pthread_create.c:333
#6  0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 3 (Thread 0xa9138b40 (LWP 2558)):
#0  0xb43bbfd0 in poll@plt () from /lib/i386-linux-gnu/libglib-2.0.so.0
#1  0xb43fca60 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#2  0xb43ee05c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb525bb14 in QEventDispatcherGlib::processEvents (this=0xa8800470, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0xb5200953 in QEventLoop::processEvents (this=0xa9138184, flags=...) at kernel/qeventloop.cpp:128
#6  0xb5200daa in QEventLoop::exec (this=0xa9138184, flags=...) at kernel/qeventloop.cpp:204
#7  0xb5026f1d in QThread::exec (this=0x92e9938) at thread/qthread.cpp:503
#8  0xb6c777a9 in QQuickPixmapReader::run (this=0x92e9938) at util/qquickpixmapcache.cpp:817
#9  0xb502c43b in QThreadPrivate::start (arg=0x92e9938) at thread/qthread_unix.cpp:331
#10 0xb4c012b5 in start_thread (arg=0xa9138b40) at pthread_create.c:333
#11 0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 2 (Thread 0xa5594b40 (LWP 2813)):
#0  0xb772cc31 in __kernel_vsyscall ()
#1  0xb4d4ef8f in poll () at ../sysdeps/unix/syscall-template.S:84
#2  0xb43fca60 in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb43ee05c in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb525bb14 in QEventDispatcherGlib::processEvents (this=0xa4c00470, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0xb5200953 in QEventLoop::processEvents (this=0xa55941b4, flags=...) at kernel/qeventloop.cpp:128
#7  0xb5200daa in QEventLoop::exec (this=0xa55941b4, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5026f1d in QThread::exec (this=0x9a1e680) at thread/qthread.cpp:503
#9  0xa5ac8980 in KCupsConnection::run() () from /usr/lib/i386-linux-gnu/libkcupslib.so
#10 0xb502c43b in QThreadPrivate::start (arg=0x9a1e680) at thread/qthread_unix.cpp:331
#11 0xb4c012b5 in start_thread (arg=0xa5594b40) at pthread_create.c:333
#12 0xb4d5916e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:114

Thread 1 (Thread 0xb1af2800 (LWP 2495)):
[KCrash Handler]
#7  0xb5233b3e in QMetaObject::activate (sender=0xa960e58, signal_index=6, argv=0x0) at kernel/qobject.cpp:3759
#8  0xb665613a in VDMModelDelegateDataType::notify (this=0xa2da6e0, items=..., index=0, count=23, roles=...) at util/qqmladaptormodel.cpp:171
#9  0xb68db374 in QQmlAdaptorModel::notify (roles=..., count=23, index=0, items=..., this=0xa2d98a4) at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/util/qqmladaptormodel_p.h:118
#10 QQmlDelegateModel::_q_itemsChanged (this=0xa2d8c08, index=0, count=23, roles=...) at types/qqmldelegatemodel.cpp:1144
#11 0xb68dfccc in QQmlDelegateModel::_q_layoutChanged (this=0xa2d8c08, parents=..., hint=QAbstractItemModel::VerticalSortHint) at types/qqmldelegatemodel.cpp:1608
#12 0xb69048f1 in QQmlDelegateModel::qt_static_metacall (_o=0xa2d8c08, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbffa2820) at .moc/moc_qqmldelegatemodel_p.cpp:205
#13 0xb6905103 in QQmlDelegateModel::qt_metacall (this=0xa2d8c08, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbffa2820) at .moc/moc_qqmldelegatemodel_p.cpp:344
#14 0xb520b842 in QMetaObject::metacall (object=0xa2d8c08, cl=QMetaObject::InvokeMetaMethod, idx=24, argv=0xbffa2820) at kernel/qmetaobject.cpp:296
#15 0xb5233387 in QMetaObject::activate (sender=0xa027228, signalOffset=3, local_signal_index=3, argv=0xbffa2820) at kernel/qobject.cpp:3728
#16 0xb5233b0d in QMetaObject::activate (sender=0xa027228, m=0xb546f018 <QAbstractItemModel::staticMetaObject>, local_signal_index=3, argv=0xbffa2820) at kernel/qobject.cpp:3578
#17 0xb52b28f6 in QAbstractItemModel::layoutChanged (this=0xa027228, _t1=..., _t2=QAbstractItemModel::VerticalSortHint) at .moc/moc_qabstractitemmodel.cpp:562
#18 0xb51d1ff5 in QSortFilterProxyModelPrivate::_q_sourceDataChanged (this=0xa2b4d80, source_top_left=..., source_bottom_right=..., roles=...) at itemmodels/qsortfilterproxymodel.cpp:1207
#19 0xb51d39c9 in QSortFilterProxyModel::qt_static_metacall (_o=0xa027228, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbffa2a6c) at .moc/moc_qsortfilterproxymodel.cpp:202
#20 0xb5233611 in QMetaObject::activate (sender=0xa029738, signalOffset=3, local_signal_index=0, argv=0xbffa2a6c) at kernel/qobject.cpp:3713
#21 0xb5233b0d in QMetaObject::activate (sender=0xa029738, m=0xb546f018 <QAbstractItemModel::staticMetaObject>, local_signal_index=0, argv=0xbffa2a6c) at kernel/qobject.cpp:3578
#22 0xb52b2821 in QAbstractItemModel::dataChanged (this=0xa029738, _t1=..., _t2=..., _t3=...) at .moc/moc_qabstractitemmodel.cpp:548
#23 0x9fea1895 in NetworkModel::updateItem (this=0xa029738, item=0xa2a9ef0) at /build/plasma-nm-8ZnBMW/plasma-nm-5.5.5/libs/models/networkmodel.cpp:566
#24 0x9fea7573 in NetworkModel::addActiveConnection (this=0xa029738, activeConnection=...) at /build/plasma-nm-8ZnBMW/plasma-nm-5.5.5/libs/models/networkmodel.cpp:294
#25 0x9fea7a67 in NetworkModel::activeConnectionAdded (this=0xa029738, activeConnection=...) at /build/plasma-nm-8ZnBMW/plasma-nm-5.5.5/libs/models/networkmodel.cpp:589
#26 0x9fead632 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QString const&>, void, void (NetworkModel::*)(QString const&)>::call (arg=0xbffa2ce4, o=0xa029738, f=<optimized out>) at /usr/include/i386-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:501
#27 QtPrivate::FunctionPointer<void (NetworkModel::*)(QString const&)>::call<QtPrivate::List<QString const&>, void> (arg=0xbffa2ce4, o=0xa029738, f=<optimized out>) at /usr/include/i386-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:520
#28 QtPrivate::QSlotObject<void (NetworkModel::*)(QString const&), QtPrivate::List<QString const&>, void>::impl (which=1, this_=0x9866940, r=0xa029738, a=0xbffa2ce4, ret=0x0) at /usr/include/i386-linux-gnu/qt5/QtCore/qobject_impl.h:143
#29 0xb5233230 in QtPrivate::QSlotObjectBase::call (a=0xbffa2ce4, r=0xa029738, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#30 QMetaObject::activate (sender=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, signalOffset=3, local_signal_index=10, argv=0xbffa2ce4) at kernel/qobject.cpp:3698
#31 0xb5233b0d in QMetaObject::activate (sender=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, m=0x9fe8d5b4 <NetworkManager::Notifier::staticMetaObject>, local_signal_index=10, argv=0xbffa2ce4) at kernel/qobject.cpp:3578
#32 0x9fe07211 in NetworkManager::Notifier::activeConnectionAdded (this=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, _t1=...) at moc_manager.cpp:408
#33 0x9fd84e07 in NetworkManager::NetworkManagerPrivate::propertiesChanged (this=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, changedProperties=...) at ../../src/manager.cpp:706
#34 0x9fd86102 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<QMap<QString, QVariant> const&>, void, void (NetworkManager::NetworkManagerPrivate::*)(QMap<QString, QVariant> const&)>::call (arg=0xbffa2f64, o=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, f=<optimized out>) at /usr/include/i386-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:501
#35 QtPrivate::FunctionPointer<void (NetworkManager::NetworkManagerPrivate::*)(QMap<QString, QVariant> const&)>::call<QtPrivate::List<QMap<QString, QVariant> const&>, void> (arg=0xbffa2f64, o=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, f=<optimized out>) at /usr/include/i386-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:520
#36 QtPrivate::QSlotObject<void (NetworkManager::NetworkManagerPrivate::*)(QMap<QString, QVariant> const&), QtPrivate::List<QMap<QString, QVariant> const&>, void>::impl (which=1, this_=0x981cee0, r=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, a=0xbffa2f64, ret=0x0) at /usr/include/i386-linux-gnu/qt5/QtCore/qobject_impl.h:143
#37 0xb5233230 in QtPrivate::QSlotObjectBase::call (a=0xbffa2f64, r=0x9fe8e520 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder>, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#38 QMetaObject::activate (sender=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, signalOffset=3, local_signal_index=3, argv=0xbffa2f64) at kernel/qobject.cpp:3698
#39 0xb5233b0d in QMetaObject::activate (sender=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, m=0x9fe8d764 <OrgFreedesktopNetworkManagerInterface::staticMetaObject>, local_signal_index=3, argv=0xbffa2f64) at kernel/qobject.cpp:3578
#40 0x9fe13471 in OrgFreedesktopNetworkManagerInterface::DeviceAdded (_t1=..., this=<optimized out>) at moc_nm-managerinterface.cpp:426
#41 OrgFreedesktopNetworkManagerInterface::qt_static_metacall (_o=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbffa3074) at moc_nm-managerinterface.cpp:204
#42 0x9fe1a8e3 in OrgFreedesktopNetworkManagerInterface::qt_metacall (this=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbffa3074) at moc_nm-managerinterface.cpp:389
#43 0xb5a1bd2a in QDBusConnectionPrivate::deliverCall (this=0xab1e2cd0, object=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, msg=..., metaTypes=..., slotIdx=9) at qdbusintegrator.cpp:978
#44 0xb5a25c99 in QDBusCallDeliveryEvent::placeMetaCall (this=0xa8cdcb0, object=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>) at qdbusintegrator_p.h:95
#45 0xb5234243 in QObject::event (this=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, e=0xa8cdcb0) at kernel/qobject.cpp:1239
#46 0xb5b9015a in QApplicationPrivate::notify_helper (this=0x8df33b8, receiver=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, e=0xa8cdcb0) at kernel/qapplication.cpp:3716
#47 0xb5b9581c in QApplication::notify (this=0xbffa36c8, receiver=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, e=0xa8cdcb0) at kernel/qapplication.cpp:3499
#48 0xb520381f in QCoreApplication::notifyInternal (this=0xbffa36c8, receiver=0x9fe8e530 <(anonymous namespace)::Q_QGS_globalNetworkManager::innerFunction()::holder+16>, event=0xa8cdcb0) at kernel/qcoreapplication.cpp:965
#49 0xb5205eff in QCoreApplication::sendEvent (event=0xa8cdcb0, receiver=<optimized out>) at kernel/qcoreapplication.h:224
#50 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8dede50) at kernel/qcoreapplication.cpp:1593
#51 0xb52063e7 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1451
#52 0xb525b703 in postEventSourceDispatch (s=0x8e15680) at kernel/qeventdispatcher_glib.cpp:271
#53 0xb43ede29 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#54 0xb43ee0c9 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#55 0xb43ee194 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#56 0xb525baf3 in QEventDispatcherGlib::processEvents (this=0x8e1e370, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#57 0xb18258e1 in QPAEventDispatcherGlib::processEvents (this=0x8e1e370, flags=...) at eventdispatchers/qeventdispatcher_glib.cpp:115
#58 0xb5200953 in QEventLoop::processEvents (this=0xbffa35e8, flags=...) at kernel/qeventloop.cpp:128
#59 0xb5200daa in QEventLoop::exec (this=0xbffa35e8, flags=...) at kernel/qeventloop.cpp:204
#60 0xb5209385 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#61 0xb5528931 in QGuiApplication::exec () at kernel/qguiapplication.cpp:1542
#62 0xb5b8c024 in QApplication::exec () at kernel/qapplication.cpp:2976
#63 0x08071eee in main (argc=2, argv=0xbffa37c4) at /build/plasma-workspace-VahMbv/plasma-workspace-5.5.5.2/shell/main.cpp:181

Possible duplicates by query: bug 363583, bug 363493, bug 363469, bug 363304, bug 363244.

Reported using DrKonqi