Application: plasma-discover (5.8.8)

Qt Version: 5.6.1
Frameworks Version: 5.36.0
Operating System: Linux 4.4.0-98-generic x86_64
Distribution: Ubuntu 16.04.3 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Discover was installing updates in Workspace 1, while I browsed a manpage in Google Chrome in the same desktop. I also had Gnucash and an RDP session running.

- Unusual behavior I noticed:
Discover posted a desktop notification that a reboot was required to complete the update, and the crash report notification happened within a second of that.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f39fc94b8c0 (LWP 1727))]

Thread 10 (Thread 0x7f39bebff700 (LWP 1763)):
#0  0x00007f39f63dea94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f39f63999a0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39a80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39bebfed00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f39f9bd19e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x22ade10) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39bebff700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 9 (Thread 0x7f39c599d700 (LWP 1745)):
#0  0x00007f39f63dea79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f39f6399929 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39c599cd00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f39f9bd19e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x42658b0) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39c599d700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7f39c67f6700 (LWP 1738)):
#0  0x00007f39f91cf70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f39f639a38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39c7d5c9d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f39f63c0bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f39f6b076ba in start_thread (arg=0x7f39c67f6700) at pthread_create.c:333
#6  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f39c6ff7700 (LWP 1737)):
#0  0x00007f39f91cb24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f39f63dd6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f6399e74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f639a330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f39f639a4d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f39f63c0bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f39f6b076ba in start_thread (arg=0x7f39c6ff7700) at pthread_create.c:333
#8  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f39d9bf1700 (LWP 1732)):
#0  0x00007f39f63dea94 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f39f63999a0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39c80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#5  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39d9bf0d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f39f9bd19e4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:500
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x7f39d0003650) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39d9bf1700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f39da3f2700 (LWP 1731)):
#0  0x00007f39f63dea79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f39f639a372 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39d00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39da3f1c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f39f9bd19e4 in QThread::exec (this=this@entry=0xe0f620) at thread/qthread.cpp:500
#6  0x00007f39fc2177d6 in QQuickPixmapReader::run (this=0xe0f620) at util/qquickpixmapcache.cpp:817
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0xe0f620) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39da3f2700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f39e19cb700 (LWP 1730)):
#0  0x00007f39f91cf70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f39f639a38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39d40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39e19cace0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f39f9bd19e4 in QThread::exec (this=this@entry=0x7d1d10) at thread/qthread.cpp:500
#6  0x00007f39fa5556b5 in QQmlThreadPrivate::run (this=0x7d1d10) at qml/ftw/qqmlthread.cpp:141
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x7d1d10) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39e19cb700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f39e2bdc700 (LWP 1729)):
#0  0x00007f39f91cf70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f39f639a38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f39f9e0037b in QEventDispatcherGlib::processEvents (this=0x7f39dc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:419
#4  0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7f39e2bdbcd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f39f9bd19e4 in QThread::exec (this=this@entry=0x7f39fcb05d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:500
#6  0x00007f39fca92515 in QDBusConnectionManager::run (this=0x7f39fcb05d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:189
#7  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x7f39fcb05d40 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:341
#8  0x00007f39f6b076ba in start_thread (arg=0x7f39e2bdc700) at pthread_create.c:333
#9  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f39eb08b700 (LWP 1728)):
#0  0x00007f39f91cf70d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f39f4390c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f39f43928d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f39ed5e1d29 in QXcbEventReader::run (this=0x75cd90) at qxcbconnection.cpp:1325
#4  0x00007f39f9bd6808 in QThreadPrivate::start (arg=0x75cd90) at thread/qthread_unix.cpp:341
#5  0x00007f39f6b076ba in start_thread (arg=0x7f39eb08b700) at pthread_create.c:333
#6  0x00007f39f91db3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f39fc94b8c0 (LWP 1727)):
[KCrash Handler]
#6  0x00007f39fbed7040 in Transaction::isActive() const () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#7  0x00007f39fbed8a5b in TransactionModel::progress() const () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#8  0x00007f39fbef64a5 in ?? () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#9  0x00007f39fbef92fb in TransactionModel::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#10 0x00007f39fa4a1319 in ReadAccessor::Direct (property=..., n=0x0, output=0x7ffc81ba6e50, object=0x7f39fc110890) at jsruntime/qv4qobjectwrapper.cpp:129
#11 LoadProperty<ReadAccessor::Direct> (v4=0x7e76f0, object=0x7f39fc110890, property=..., notifier=0x0) at jsruntime/qv4qobjectwrapper.cpp:164
#12 0x00007f39fa4a23c5 in QV4::QObjectWrapper::getProperty (engine=engine@entry=0x7e76f0, object=0x7f39fc110890, property=0xccaa58, captureRequired=captureRequired@entry=true) at jsruntime/qv4qobjectwrapper.cpp:378
#13 0x00007f39fa4a2b4a in QV4::QObjectWrapper::getQmlProperty (this=0x7f39e09cc3e8, qmlContext=0xc44180, name=0x7f39e09cc3e0, revisionMode=QV4::QObjectWrapper::IgnoreRevision, hasProperty=0x0, includeImports=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:318
#14 0x00007f39fa4b469e in QV4::Object::get (hasProperty=0x0, name=<optimized out>, this=<optimized out>) at jsruntime/qv4object_p.h:298
#15 QV4::Runtime::getProperty (engine=0x7e76f0, object=..., nameIndex=<optimized out>) at jsruntime/qv4runtime.cpp:679
#16 0x00007f39e802f310 in ?? ()
#17 0x00007ffc81ba7280 in ?? ()
#18 0x0000000000000002 in ?? ()
#19 0x0000000000000001 in ?? ()
#20 0x00007f39fa4c0cf0 in QQmlVMEMetaObject::metaCall (this=0x7f39e09cc320, o=<optimized out>, c=2176479488, _id=-526597152, a=0x7e76f0) at qml/qqmlvmemetaobject.cpp:876
#21 0x00007f39fa53a724 in QV4::Object::call (d=0x7f39e09cc320, this=0x7f39e0025800) at ../../include/QtQml/5.6.1/QtQml/private/../../../../../src/qml/jsruntime/qv4object_p.h:324
#22 QQmlJavaScriptExpression::evaluate (this=this@entry=0xc906a0, callData=callData@entry=0x7f39e09cc320, isUndefined=isUndefined@entry=0x7ffc81ba732c) at qml/qqmljavascriptexpression.cpp:189
#23 0x00007f39fa53abc1 in QQmlJavaScriptExpression::evaluate (this=this@entry=0xc906a0, isUndefined=isUndefined@entry=0x7ffc81ba732c) at qml/qqmljavascriptexpression.cpp:149
#24 0x00007f39fa54247e in QQmlBinding::update (this=0xc906a0, flags=...) at qml/qqmlbinding.cpp:187
#25 0x00007f39fa54298e in QQmlBinding::refresh (this=<optimized out>) at qml/qqmlbinding.cpp:403
#26 0x00007f39fa519ace in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x0) at qml/qqmlnotifier.cpp:94
#27 0x00007f39fa4c54ac in QQmlData::signalEmitted (object=0x7f39fc110890, index=31, a=0x0) at qml/qqmlengine.cpp:773
#28 0x00007f39f9dd72b0 in QMetaObject::activate (sender=0x7f39fc110890, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3616
#29 0x00007f39f9dd7c24 in QtPrivate::QSlotObjectBase::call (a=0x7ffc81ba8f60, r=0x7f39fc110890, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#30 QMetaObject::activate (sender=sender@entry=0x7f39fc110890, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffc81ba8f60) at kernel/qobject.cpp:3715
#31 0x00007f39f9dd81b7 in QMetaObject::activate (sender=sender@entry=0x7f39fc110890, m=m@entry=0x7f39f9ff2da0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=12, argv=argv@entry=0x7ffc81ba8f60) at kernel/qobject.cpp:3595
#32 0x00007f39f9e500b4 in QAbstractItemModel::rowsRemoved (this=this@entry=0x7f39fc110890, _t1=..., _t2=-1, _t3=-1) at .moc/moc_qabstractitemmodel.cpp:615
#33 0x00007f39f9d5299b in QAbstractItemModel::endRemoveRows (this=0x7f39fc110890) at itemmodels/qabstractitemmodel.cpp:2678
#34 0x00007f39fbed9a9c in TransactionModel::removeTransaction(Transaction*) () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#35 0x00007f39f9dd7c24 in QtPrivate::QSlotObjectBase::call (a=0x7ffc81ba9160, r=0x7f39fc110890, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#36 QMetaObject::activate (sender=sender@entry=0x9050d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc81ba9160) at kernel/qobject.cpp:3715
#37 0x00007f39f9dd81b7 in QMetaObject::activate (sender=sender@entry=0x9050d0, m=m@entry=0x7f39f9fea820 <QObject::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffc81ba9160) at kernel/qobject.cpp:3595
#38 0x00007f39f9dd825f in QObject::destroyed (this=this@entry=0x9050d0, _t1=_t1@entry=0x9050d0) at .moc/moc_qobject.cpp:213
#39 0x00007f39f9ddecf5 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:913
#40 0x00007f39fbeea08d in ?? () from /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#41 0x00007f39f9dd8750 in QObject::event (this=0x9050d0, e=<optimized out>) at kernel/qobject.cpp:1247
#42 0x00007f39fad67afc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x9050d0, e=0xd74690) at kernel/qapplication.cpp:3804
#43 0x00007f39fad6d036 in QApplication::notify (this=0x7ffc81ba9840, receiver=0x9050d0, e=0xd74690) at kernel/qapplication.cpp:3561
#44 0x00007f39f9dab2a8 in QCoreApplication::notifyInternal2 (receiver=0x9050d0, event=event@entry=0xd74690) at kernel/qcoreapplication.cpp:1015
#45 0x00007f39f9dad16a in QCoreApplication::sendEvent (event=0xd74690, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:225
#46 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x743de0) at kernel/qcoreapplication.cpp:1650
#47 0x00007f39f9dad628 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508
#48 0x00007f39f9dfff53 in postEventSourceDispatch (s=0x78a860) at kernel/qeventdispatcher_glib.cpp:270
#49 0x00007f39f639a197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#50 0x00007f39f639a3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007f39f639a49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007f39f9e0035f in QEventDispatcherGlib::processEvents (this=0x785de0, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#53 0x00007f39f9da8ffa in QEventLoop::exec (this=this@entry=0x7ffc81ba9760, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#54 0x00007f39f9db16bc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1285
#55 0x000000000040a2d5 in ?? ()
#56 0x00007f39f90f4830 in __libc_start_main (main=0x409bc0, argc=3, argv=0x7ffc81ba99d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc81ba99c8) at ../csu/libc-start.c:291
#57 0x000000000040a419 in _start ()

Possible duplicates by query: bug 386477, bug 386447, bug 383413.

Reported using DrKonqi