Application: plasma-desktop (4.11.16)
KDE Platform Version: 4.14.30
Qt Version: 4.8.6
Operating System: Linux 4.9.35 x86_64
Distribution: "Mageia 5"

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

I've seen Plasma crash several times when ModemManager has crashed, and also with e.g. "killall -9 ModemManager".

-- Backtrace:
Application: Plasma-työpöytäkuori (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe42df3f780 (LWP 1313))]

Thread 3 (Thread 0x7fe40215f700 (LWP 1314)):
#0  0x00007fe42c7d867f in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fe41e34373a in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7fe41e646f80 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007fe41e343769 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007fe42c7d35bd in start_thread (arg=0x7fe40215f700) at pthread_create.c:310
#4  0x00007fe42b54b62d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fe37ca6a700 (LWP 1315)):
#0  0x00007fe42b53fd6d in poll () at /lib64/libc.so.6
#1  0x00007fe428626604 in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7fe378003410, timeout=-1, context=0x7fe3780009a0) at gmain.c:4135
#2  0x00007fe428626604 in g_main_context_iterate (context=context@entry=0x7fe3780009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3835
#3  0x00007fe42862670c in g_main_context_iteration (context=0x7fe3780009a0, may_block=1) at gmain.c:3901
#4  0x00007fe42cb90e3e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fe3780008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#5  0x00007fe42cb62931 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fe37ca69e20, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fe42cb62c45 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fe37ca69e20, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fe42ca60899 in QThread::exec() (this=this@entry=0x1d17c90) at thread/qthread.cpp:538
#8  0x00007fe42cb443d3 in QInotifyFileSystemWatcherEngine::run() (this=0x1d17c90) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007fe42ca62fff in QThreadPrivate::start(void*) (arg=0x1d17c90) at thread/qthread_unix.cpp:349
#10 0x00007fe42c7d35bd in start_thread (arg=0x7fe37ca6a700) at pthread_create.c:310
#11 0x00007fe42b54b62d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fe42df3f780 (LWP 1313)):
[KCrash Handler]
#5  0x00007fe37e9c7e58 in NetworkManager::Device::udi() const (this=0x0) at /usr/src/debug/libnm-qt-0.9.8.3/device.cpp:384
#6  0x00007fe37ed13923 in UiUtils::modemDetails(QSharedPointer<NetworkManager::ModemDevice> const&, QStringList const&) (modemDevice=..., keys=...) at /usr/src/debug/plasma-nm-0.9.3.5/libs/uiutils.cpp:676
#7  0x00007fe37ed07b9f in NetworkModelItem::updateDetails() (this=this@entry=0x330e140) at /usr/src/debug/plasma-nm-0.9.3.5/libs/models/networkmodelitem.cpp:456
#8  0x00007fe37ecfb6c5 in NetworkModel::updateItem(NetworkModelItem*) (this=this@entry=0xf18b30, item=item@entry=0x330e140) at /usr/src/debug/plasma-nm-0.9.3.5/libs/models/networkmodel.cpp:575
#9  0x00007fe37ed03a83 in NetworkModel::connectionUpdated() (this=0xf18b30) at /usr/src/debug/plasma-nm-0.9.3.5/libs/models/networkmodel.cpp:821
#10 0x00007fe37ecf8425 in NetworkModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at /usr/src/debug/plasma-nm-0.9.3.5/build/libs/moc_networkmodel.cpp:119
#11 0x00007fe42cb7788a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x4a49ec0, m=m@entry=0x7fe37ecdd440 <NetworkManager::Connection::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3567
#12 0x00007fe37e9c18b3 in NetworkManager::Connection::updated() (this=this@entry=0x4a49ec0) at /usr/src/debug/libnm-qt-0.9.8.3/build/connection.moc:120
#13 0x00007fe37e9c4c76 in NetworkManager::Connection::onConnectionUpdated() (this=0x4a49ec0) at /usr/src/debug/libnm-qt-0.9.8.3/connection.cpp:174
#14 0x00007fe42cb7788a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=sender@entry=0x39ce1f0, m=m@entry=0x7fe37ecdf600 <OrgFreedesktopNetworkManagerSettingsConnectionInterface::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3567
#15 0x00007fe37ea12063 in OrgFreedesktopNetworkManagerSettingsConnectionInterface::Updated() (this=this@entry=0x39ce1f0) at /usr/src/debug/libnm-qt-0.9.8.3/build/nm-settings-connectioninterface.moc:123
#16 0x00007fe37ea120c8 in OrgFreedesktopNetworkManagerSettingsConnectionInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=_o@entry=0x39ce1f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=1, _a=_a@entry=0x7ffef6a3cc20) at /usr/src/debug/libnm-qt-0.9.8.3/build/nm-settings-connectioninterface.moc:61
#17 0x00007fe37ea12a23 in OrgFreedesktopNetworkManagerSettingsConnectionInterface::qt_metacall(QMetaObject::Call, int, void**) (this=0x39ce1f0, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffef6a3cc20) at /usr/src/debug/libnm-qt-0.9.8.3/build/nm-settings-connectioninterface.moc:108
#18 0x00007fe429ab3b06 in QDBusConnectionPrivate::deliverCall(QObject*, int, QDBusMessage const&, QList<int> const&, int) (this=0xec9040, object=0x39ce1f0, msg=..., metaTypes=..., slotIdx=6) at qdbusintegrator.cpp:951
#19 0x00007fe42cb7bd61 in QObject::event(QEvent*) (this=0x39ce1f0, e=<optimized out>) at kernel/qobject.cpp:1222
#20 0x00007fe42bcdb79c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0xe3c710, receiver=receiver@entry=0x39ce1f0, e=e@entry=0x4eb54b0) at kernel/qapplication.cpp:4565
#21 0x00007fe42bce1e40 in QApplication::notify(QObject*, QEvent*) (this=0xe28920, receiver=0x39ce1f0, e=0x4eb54b0) at kernel/qapplication.cpp:4351
#22 0x00007fe42d92640a in KApplication::notify(QObject*, QEvent*) () at /lib64/libkdeui.so.5
#23 0x00007fe42cb63cad in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0xe28920, receiver=receiver@entry=0x39ce1f0, event=event@entry=0x4eb54b0) at kernel/qcoreapplication.cpp:953
#24 0x00007fe42cb66be1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x4eb54b0, receiver=0x39ce1f0) at kernel/qcoreapplication.h:231
#25 0x00007fe42cb66be1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xd44070) at kernel/qcoreapplication.cpp:1577
#26 0x00007fe42cb67073 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#27 0x00007fe42cb90cae in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) () at kernel/qcoreapplication.h:236
#28 0x00007fe42cb90cae in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0xe23b20) at kernel/qeventdispatcher_glib.cpp:300
#29 0x00007fe4286263bd in g_main_context_dispatch (context=0xe2e5d0) at gmain.c:3154
#30 0x00007fe4286263bd in g_main_context_dispatch (context=context@entry=0xe2e5d0) at gmain.c:3769
#31 0x00007fe428626668 in g_main_context_iterate (context=context@entry=0xe2e5d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3840
#32 0x00007fe42862670c in g_main_context_iteration (context=0xe2e5d0, may_block=1) at gmain.c:3901
#33 0x00007fe42cb90e1e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0xe2e800, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#34 0x00007fe42bd794f6 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#35 0x00007fe42cb62931 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffef6a3d210, flags=...) at kernel/qeventloop.cpp:149
#36 0x00007fe42cb62c45 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffef6a3d210, flags=...) at kernel/qeventloop.cpp:204
#37 0x00007fe42cb67e59 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1225
#38 0x00007fe42bcd9dac in QApplication::exec() () at kernel/qapplication.cpp:3823
#39 0x00007fe4156e236d in kdemain(int, char**) (argc=1, argv=0xdceb20) at /usr/src/debug/kde-workspace-4.11.16/plasma/desktop/shell/main.cpp:126
#40 0x000000000040819a in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#41 0x0000000000409021 in handle_launcher_request(int, char const*) [clone .isra.15] ()
#42 0x000000000040972a in handle_requests(int) ()
#43 0x0000000000405303 in main ()

Reported using DrKonqi