Application: plasma-discover (5.8.8)

Qt Version: 5.6.1
Frameworks Version: 5.36.0
Operating System: Linux 4.4.0-101-generic x86_64
Distribution: Ubuntu 16.04.3 LTS

-- Information about the crash:
Every time I try to use Discover to update packages it crashes.

The crash can be reproduced every time.

-- 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 0x7f86526258c0 (LWP 17306))]

Thread 8 (Thread 0x7f8618cda700 (LWP 17325)):
#0  0x00007f864eea470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f864c06f38c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f86080392d0, timeout=<optimized out>, context=0x7f8608000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  0x00007f864c06f38c in g_main_context_iterate (context=context@entry=0x7f8608000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f864c06f49c in g_main_context_iteration (context=0x7f8608000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f864c7dc6ba in start_thread (arg=0x7f8618cda700) at pthread_create.c:333
#9  0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7f861b8d8700 (LWP 17320)):
#0  0x00007f864c0b3a79 in g_mutex_lock (mutex=mutex@entry=0x7f8614000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gthread-posix.c:1335
#1  0x00007f864c06e929 in g_main_context_prepare (context=context@entry=0x7f8614000990, priority=priority@entry=0x7f861b8d7bc0) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3444
#2  0x00007f864c06f2bb in g_main_context_iterate (context=context@entry=0x7f8614000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3820
#3  0x00007f864c06f49c in g_main_context_iteration (context=0x7f8614000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f864c7dc6ba in start_thread (arg=0x7f861b8d8700) at pthread_create.c:333
#9  0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f862b7fe700 (LWP 17311)):
#0  0x00007f864eea470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f864c06f38c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f861c003070, timeout=<optimized out>, context=0x7f861c000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  0x00007f864c06f38c in g_main_context_iterate (context=context@entry=0x7f861c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f864c06f49c in g_main_context_iteration (context=0x7f861c000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f864c7dc6ba in start_thread (arg=0x7f862b7fe700) at pthread_create.c:333
#9  0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f862bfff700 (LWP 17310)):
#0  0x00007f864eea470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f864c06f38c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8624068070, timeout=<optimized out>, context=0x7f8624000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  0x00007f864c06f38c in g_main_context_iterate (context=context@entry=0x7f8624000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f864c06f49c in g_main_context_iteration (context=0x7f8624000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8651eec7d6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f864c7dc6ba in start_thread (arg=0x7f862bfff700) at pthread_create.c:333
#10 0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f86335ef700 (LWP 17309)):
#0  0x00007ffc75355ab0 in clock_gettime ()
#1  0x00007f864eebe836 in __GI___clock_gettime (clock_id=1, tp=0x7f86335eea40) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007f864f9576c6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f864fad2f09 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f864fad3475 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fad485e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864c06e91d in g_main_context_prepare (context=context@entry=0x7f862c000990, priority=priority@entry=0x7f86335eeba0) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3442
#7  0x00007f864c06f2bb in g_main_context_iterate (context=context@entry=0x7f862c000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3820
#8  0x00007f864c06f49c in g_main_context_iteration (context=0x7f862c000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#9  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f865022a6b5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f864c7dc6ba in start_thread (arg=0x7f86335ef700) at pthread_create.c:333
#15 0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f86388a9700 (LWP 17308)):
#0  0x00007f864eea470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f864c06f38c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f8634013fe0, timeout=<optimized out>, context=0x7f8634000990) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:4135
#2  0x00007f864c06f38c in g_main_context_iterate (context=context@entry=0x7f8634000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3835
#3  0x00007f864c06f49c in g_main_context_iteration (context=0x7f8634000990, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#4  0x00007f864fad537b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f864f8a69e4 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f865276c515 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f864c7dc6ba in start_thread (arg=0x7f86388a9700) at pthread_create.c:333
#10 0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f8640d65700 (LWP 17307)):
#0  0x00007f864eea470d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f864a065c62 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f864a0678d7 in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f86432bbd29 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f864f8ab808 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f864c7dc6ba in start_thread (arg=0x7f8640d65700) at pthread_create.c:333
#6  0x00007f864eeb03dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f86526258c0 (LWP 17306)):
[KCrash Handler]
#6  0x00007f8651bac040 in Transaction::isActive() const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#7  0x00007f8651bada5b in TransactionModel::progress() const () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#8  0x00007f8651bcb4a5 in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#9  0x00007f8651bce2fb in TransactionModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#10 0x00007f8650176319 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f86501773c5 in QV4::QObjectWrapper::getProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f8650177b4a in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) const () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f865018969e in QV4::Runtime::getProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f8638084a20 in  ()
#15 0x00007ffc752440a0 in  ()
#16 0x0000000000000002 in  ()
#17 0x0000000000000001 in  ()
#18 0x00007f8650195cf0 in QQmlVMEMetaObject::metaCall(QObject*, QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f865020f724 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f865020fbc1 in QQmlJavaScriptExpression::evaluate(bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f865021747e in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f865021798e in QQmlBinding::refresh() () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#23 0x00007f86501eeace in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f865019a4ac in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007f864faac2b0 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f864faacc24 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f864fb250b4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f864fa2799b in QAbstractItemModel::endRemoveRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f8651baea9c in TransactionModel::removeTransaction(Transaction*) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#30 0x00007f864faacc24 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f864faad25f in QObject::destroyed(QObject*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f864fab3cf5 in QObject::~QObject() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f8651bbf08d in  () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#34 0x00007f864faad750 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f8650a3cafc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f8650a42036 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007f864fa802a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f864fa8216a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f864fad4f53 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007f864c06f197 in g_main_context_dispatch (context=0x7f863c0016f0) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3154
#41 0x00007f864c06f197 in g_main_context_dispatch (context=context@entry=0x7f863c0016f0) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3769
#42 0x00007f864c06f3f0 in g_main_context_iterate (context=context@entry=0x7f863c0016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3840
#43 0x00007f864c06f49c in g_main_context_iteration (context=0x7f863c0016f0, may_block=1) at /build/glib2.0-prJhLS/glib2.0-2.48.2/./glib/gmain.c:3901
#44 0x00007f864fad535f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007f864fa7dffa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007f864fa866bc in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x000000000040a2d5 in  ()
#48 0x00007f864edc9830 in __libc_start_main (main=0x409bc0, argc=3, argv=0x7ffc752467f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc752467e8) at ../csu/libc-start.c:291
#49 0x000000000040a419 in _start ()

Reported using DrKonqi