Reading symbols from /usr/bin/system-settings...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/system-settings 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe0778700 (LWP 21222)]
UCUriHandler: Empty "APP_ID" environment variable, ignoring.
[New Thread 0x7fffc1575700 (LWP 21239)]
[New Thread 0x7fffd513c700 (LWP 21236)]
[New Thread 0x7fffd67a3700 (LWP 21226)]
[New Thread 0x7fffd7fff700 (LWP 21225)]
[New Thread 0x7fffeaf13700 (LWP 21199)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc1575700 (LWP 21239)]
QNetworkManagerInterfaceDeviceWired::carrier (this=this@entry=0x0) at qnetworkmanagerservice.cpp:492
492	qnetworkmanagerservice.cpp: No such file or directory.
(gdb) thread apply all bt

Thread 7 (Thread 0x7fffeaf13700 (LWP 21199)):
#0  0x00007ffff5e1a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffeeb52b72 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fffeeb5464f in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fffee172099 in QXcbEventReader::run (this=0x6957e0) at qxcbconnection.cpp:1105
#4  0x00007ffff7938bce in QThreadPrivate::start (arg=0x6957e0) at thread/qthread_unix.cpp:337
#5  0x00007ffff5b086aa in start_thread (arg=0x7fffeaf13700) at pthread_create.c:333
#6  0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fffd7fff700 (LWP 21225)):
#0  0x00007ffff5e1a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff6657ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6658242 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffe3d5faf6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007ffff667e955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff5b086aa in start_thread (arg=0x7fffd7fff700) at pthread_create.c:333
#6  0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fffd67a3700 (LWP 21226)):
#0  0x00007ffff5e1a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff6657ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6657fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff7bd0167 in QEventDispatcherGlib::processEvents (this=0x7fffc80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#4  0x00007ffff7b748f2 in QEventLoop::exec (this=this@entry=0x7fffd67a2dd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007ffff7933c04 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007ffff705acb6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007ffff7938bce in QThreadPrivate::start (arg=0x70fb70) at thread/qthread_unix.cpp:337
#8  0x00007ffff5b086aa in start_thread (arg=0x7fffd67a3700) at pthread_create.c:333
#9  0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fffd513c700 (LWP 21236)):
#0  0x00007ffff5e1a8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff6657ebc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6657fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fffe0a3b27d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007ffff667e955 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffff5b086aa in start_thread (arg=0x7fffd513c700) at pthread_create.c:333
#6  0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fffc1575700 (LWP 21239)):
#0  QNetworkManagerInterfaceDeviceWired::carrier (this=this@entry=0x0) at qnetworkmanagerservice.cpp:492
#1  0x00007fffdc078537 in QNetworkManagerEngine::parseConnection (this=this@entry=0xf33980, settingsPath=..., map=...) at qnetworkmanagerengine.cpp:630
#2  0x00007fffdc0793d7 in QNetworkManagerEngine::newConnection (this=this@entry=0xf33980, path=..., settings=<optimized out>) at qnetworkmanagerengine.cpp:460
#3  0x00007fffdc079ee7 in QNetworkManagerEngine::setupConfigurations (this=this@entry=0xf33980) at qnetworkmanagerengine.cpp:142
#4  0x00007fffdc07a481 in QNetworkManagerEngine::nmRegistered (this=0xf33980) at qnetworkmanagerengine.cpp:911
#5  0x00007fffdc08b5b6 in QNetworkManagerEngine::qt_static_metacall (_o=0x7fffc1574640, _c=QMetaObject::QueryPropertyEditable, _id=2, _a=0x0) at .moc/moc_qnetworkmanagerengine.cpp:150
#6  0x00007ffff7ba8c4a in QObject::event (this=0xf33980, e=<optimized out>) at kernel/qobject.cpp:1245
#7  0x00007ffff7b77005 in QCoreApplication::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:997
#8  0x00007ffff7b7713b in QCoreApplication::notifyInternal (this=0x7fffffffd850, receiver=0xf33980, event=event@entry=0xf37960) at kernel/qcoreapplication.cpp:935
#9  0x00007ffff7b791ab in sendEvent (event=0xf37960, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#10 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xf32860) at kernel/qcoreapplication.cpp:1552
#11 0x00007ffff7b797a8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#12 0x00007ffff7bcfd53 in postEventSourceDispatch (s=0x7fffbc0012d0) at kernel/qeventdispatcher_glib.cpp:271
#13 0x00007ffff6657c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007ffff6657f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#15 0x00007ffff6657fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff7bd017c in QEventDispatcherGlib::processEvents (this=0x7fffbc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#17 0x00007ffff7b748f2 in QEventLoop::exec (this=this@entry=0x7fffc1574e40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#18 0x00007ffff7933c04 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#19 0x00007ffff7938bce in QThreadPrivate::start (arg=0xf32720) at thread/qthread_unix.cpp:337
#20 0x00007ffff5b086aa in start_thread (arg=0x7fffc1575700) at pthread_create.c:333
#21 0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fffe0778700 (LWP 21222)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff7939d2b in wait (time=18446744073709551615, this=0xa97310) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x982d70, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007ffff6e006a2 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#4  0x00007ffff6dd6d31 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007ffff6dd8107 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007ffff6dd8c16 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007ffff6dd8eb3 in QQmlImports::addLibraryImport(QQmlImportDatabase*, QString const&, QString const&, int, int, QString const&, QString const&, bool, QList<QQmlError>*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007ffff6da2571 in QQmlTypeLoader::Blob::addImport(QV4::CompiledData::Import const*, QList<QQmlError>*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007ffff6da2c1a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007ffff6da34c0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007ffff6d9a316 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007ffff6d9a651 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007ffff6d9cb81 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007ffff6d9d01d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007ffff6e002c8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007ffff6e0089a in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007ffff7b77005 in QCoreApplication::notify (this=<optimized out>, receiver=<optimized out>, event=<optimized out>) at kernel/qcoreapplication.cpp:997
#18 0x00007ffff7b7713b in QCoreApplication::notifyInternal (this=0x7fffffffd850, receiver=0x982d00, event=event@entry=0xf31ef0) at kernel/qcoreapplication.cpp:935
#19 0x00007ffff7b791ab in sendEvent (event=0xf31ef0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:228
#20 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0xa9ba60) at kernel/qcoreapplication.cpp:1552
#21 0x00007ffff7b797a8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1410
#22 0x00007ffff7bcfd53 in postEventSourceDispatch (s=0x7fffd8002300) at kernel/qeventdispatcher_glib.cpp:271
#23 0x00007ffff6657c3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ffff6657f20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007ffff6657fcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007ffff7bd0167 in QEventDispatcherGlib::processEvents (this=0x7fffd80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#27 0x00007ffff7b748f2 in QEventLoop::exec (this=this@entry=0x7fffe0777e20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007ffff7933c04 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#29 0x00007ffff6dfff65 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#30 0x00007ffff7938bce in QThreadPrivate::start (arg=0x982d00) at thread/qthread_unix.cpp:337
#31 0x00007ffff5b086aa in start_thread (arg=0x7fffe0778700) at pthread_create.c:333
#32 0x00007ffff5e25eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7ffff7e39780 (LWP 21173)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff7939d2b in wait (time=18446744073709551615, this=0xf37750) at thread/qwaitcondition_unix.cpp:128
#2  QWaitCondition::wait (this=this@entry=0xf34fe8, mutex=mutex@entry=0xf34fe0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:200
#3  0x00007ffff793279b in QSemaphore::acquire (this=this@entry=0x7fffffffbb30, n=n@entry=1) at thread/qsemaphore.cpp:137
#4  0x00007ffff7b80a3b in QMetaMethod::invoke (this=this@entry=0x7fffffffbd98, object=object@entry=0xf33980, connectionType=Qt::BlockingQueuedConnection, connectionType@entry=4294950432, returnValue=..., val0=..., val1=..., 
    val2=..., val3=..., val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:2240
#5  0x00007ffff7b85b45 in QMetaObject::invokeMethod (obj=0xf33980, member=member@entry=0x7ffff7f58b88 "initialize", type=4294950432, type@entry=Qt::BlockingQueuedConnection, ret=..., val0=..., val1=..., val2=..., val3=..., 
    val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:1478
#6  0x00007ffff7ee1ed7 in invokeMethod (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=..., val2=..., val1=..., val0=..., type=Qt::BlockingQueuedConnection, member=0x7ffff7f58b88 "initialize", obj=<optimized out>)
    at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs.h:391
#7  QNetworkConfigurationManagerPrivate::updateConfigurations (this=this@entry=0xf32590) at bearer/qnetworkconfigmanager_p.cpp:433
#8  0x00007ffff7ee2466 in QNetworkConfigurationManagerPrivate::initialize (this=this@entry=0xf32590) at bearer/qnetworkconfigmanager_p.cpp:70
---Type <return> to continue, or q <return> to quit---
#9  0x00007ffff7edbba1 in qNetworkConfigurationManagerPrivate () at bearer/qnetworkconfigmanager.cpp:89
#10 0x00007ffff7edbc34 in QNetworkConfigurationManager::QNetworkConfigurationManager (this=0xf32430, parent=<optimized out>) at bearer/qnetworkconfigmanager.cpp:229
#11 0x00007ffff7ea3d12 in QNetworkAccessManagerPrivate (this=<optimized out>) at access/qnetworkaccessmanager_p.h:87
#12 QNetworkAccessManager::QNetworkAccessManager (this=0xf32178, parent=0xf32168) at access/qnetworkaccessmanager.cpp:425
#13 0x00007fffd42dd4dd in UpdatePlugin::Network::Network(QObject*) () from /usr/lib/x86_64-linux-gnu/ubuntu-system-settings/libupdate-plugin.so
#14 0x00007fffd42e5238 in UpdatePlugin::UpdateManager::UpdateManager(QObject*) () from /usr/lib/x86_64-linux-gnu/ubuntu-system-settings/libupdate-plugin.so
#15 0x00007fffd42e512c in UpdatePlugin::UpdateManager::instance() () from /usr/lib/x86_64-linux-gnu/ubuntu-system-settings/libupdate-plugin.so
#16 0x00007fffd4515864 in BackendPlugin::initializeEngine(QQmlEngine*, char const*) () from /usr/lib/x86_64-linux-gnu/ubuntu-system-settings/private/Ubuntu/SystemSettings/Update/libUbuntuUpdatePanel.so
#17 0x00007ffff6e00595 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007ffff6d9d0e5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007ffff6d9d27e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007ffff6d7e42e in QQmlComponentPrivate::loadUrl(QUrl const&, QQmlComponent::CompilationMode) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x0000000000426156 in SystemSettings::Plugin::entryComponent() ()
#22 0x000000000042921f in SystemSettings::Plugin::qt_metacall(QMetaObject::Call, int, void**) ()
#23 0x00007ffff6d3f312 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007ffff6d4058d in QV4::QObjectWrapper::getProperty(QObject*, QV4::ExecutionContext*, QQmlPropertyData*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007ffff6d40eb6 in QV4::QObjectWrapper::getQmlProperty(QV4::ExecutionContext*, QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#26 0x00007ffff6d410e1 in QV4::QObjectWrapper::get(QV4::Managed*, QV4::String*, bool*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#27 0x00007ffff6d4e927 in QV4::Runtime::getProperty(QV4::ExecutionContext*, QV4::ValueRef, QV4::String*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#28 0x00007fffdef1685b in ?? ()
#29 0x00007fffffffcabc in ?? ()
#30 0x00007fffffffcaa0 in ?? ()
#31 0x00007fffffffcba0 in ?? ()
#32 0x00007fffdf778058 in ?? ()
#33 0x00007fffdf738000 in ?? ()
#34 0x0000000000a9c430 in ?? ()
#35 0x0000000000a9c430 in ?? ()
#36 0x0000000000a9c430 in ?? ()
#37 0x00007fffdf738000 in ?? ()
#38 0x00007ffff6d00936 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#39 0x00007ffff6de5c8f in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#40 0x00007ffff6de6196 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#41 0x00007ffff6dee489 in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#42 0x00007ffff6df78df in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#43 0x00007ffff6d801ca in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#44 0x00007ffff6d80b7a in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#45 0x00007ffff6e47db7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007ffff6e47f83 in QQmlDelegateModel::object(int, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#47 0x00007ffff7186b1d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#48 0x00007ffff7188d10 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#49 0x00007ffff6df79c7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007ffff6d7bbab in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007ffff6d7bc67 in QQmlComponentPrivate::completeCreate() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007ffff6d7dd70 in QQmlComponent::create(QQmlContext*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007ffff71ac23b in QQuickView::continueExecute() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#54 0x00007ffff71ac68d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#55 0x000000000041e8eb in main ()