Application: plasma-discover (5.14.1)

Qt Version: 5.11.1
Frameworks Version: 5.51.0
Operating System: Linux 4.18.0-10-generic x86_64
Distribution: Ubuntu 18.10

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

Search "fingerprint" in Discover then view "fprint-demo", causing Discover application to crash

The crash can be reproduced sometimes.

-- 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 0x7f5c6d9adc80 (LWP 9514))]

Thread 13 (Thread 0x7f5c2ffff700 (LWP 9582)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c24002900, nfds=1, timeout=103699) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f5c44ac4700 (LWP 9579)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c28002900, nfds=2, timeout=29693) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f5c452c5700 (LWP 9578)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c34002900, nfds=1, timeout=93693) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f5c461b8700 (LWP 9529)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c30044300, nfds=1, timeout=84693) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f5c46b2e700 (LWP 9526)):
#0  0x00007f5c720e0846 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7f5c46b2dc50, expected=0, futex_word=0x7f5c40005200) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007f5c720e0846 in __pthread_cond_wait_common (abstime=0x7f5c46b2dd10, mutex=0x7f5c400051b0, cond=0x7f5c400051d8) at pthread_cond_wait.c:533
#2  0x00007f5c720e0846 in __pthread_cond_timedwait (cond=0x7f5c400051d8, mutex=0x7f5c400051b0, abstime=0x7f5c46b2dd10) at pthread_cond_wait.c:667
#3  0x00007f5c7335031c in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c73348182 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f5c47d34700 (LWP 9524)):
#0  0x00007f5c735482b9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f5c7354a5c5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f5c70d87821 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c70d87df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f5c50d58700 (LWP 9522)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c48004e10, nfds=1, timeout=9696) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f5c58e9e700 (LWP 9521)):
#0  0x00007f5c73020f64 in __GI___libc_read (fd=13, buf=0x7f5c58e9db40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f5c70dcd180 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d8791f in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c70d87df0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5c74d9e396 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#11 0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f5c5a10b700 (LWP 9519)):
#0  0x00007f5c720e02eb in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55d9836b71e8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f5c720e02eb in __pthread_cond_wait_common (abstime=0x0, mutex=0x55d9836b7198, cond=0x55d9836b71c0) at pthread_cond_wait.c:502
#2  0x00007f5c720e02eb in __pthread_cond_wait (cond=0x55d9836b71c0, mutex=0x55d9836b7198) at pthread_cond_wait.c:655
#3  0x00007f5c5a7bc46b in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f5c5a7bc1d7 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f5c68e1c700 (LWP 9518)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c60004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70d87e46 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c73b381f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f5c6a02d700 (LWP 9517)):
#0  0x00007f5c70dce524 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f5c70d879c9 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f5c70d87ed8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f5c7354a15b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f5c733460b6 in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c74863545 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f5c6bf1d700 (LWP 9516)):
#0  0x00007f5c730256d9 in __GI___poll (fds=0x7f5c6bf1ccb8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f5c70cab917 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5c70cad53a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5c6d2dd159 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f5c7334fc87 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f5c720da164 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f5c73031def in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f5c6d9adc80 (LWP 9514)):
[KCrash Handler]
#6  0x00007f5c73501737 in QMetaObject::cast(QObject const*) const () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f5c73b73b3c in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f5c73b7ab42 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f5c73b7abe2 in QQmlDelegateModel::release(QObject*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f5c73b6f759 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f5c73b6fbe6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f5c73b6fef0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f5c73b71115 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f5c73aa0582 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f5c73a9d863 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f5c73b1f9c4 in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f5c73b20af0 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f5c73b220bc in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f5c73b1e6b3 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f5c73af55e3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f5c73a8e35a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f5c7352100f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f5c73af55e3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f5c73a8e35a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007f5c7352100f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f5c73b24296 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#27 0x00007f5c73a6db55 in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, QV4::Value*, int, QV4::Value*, int) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#28 0x00007f5c73a61082 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#29 0x00007f5c73b1882f in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#30 0x00007f5c73aaad57 in QQmlBoundSignalExpression::evaluate(void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#31 0x00007f5c73aabeeb in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#32 0x00007f5c73af55e3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#33 0x00007f5c73a8e35a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#34 0x00007f5c7352100f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f5c73b6fa76 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#36 0x00007f5c73b70eb6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#37 0x00007f5c735216db in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f5c73b6755d in QQmlInstanceModel::createdItem(int, QObject*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#39 0x00007f5c73b7b25d in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#40 0x00007f5c73aa670f in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#41 0x00007f5c73aa6baf in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#42 0x00007f5c73b7a269 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#43 0x00007f5c73b7a391 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#44 0x00007f5c73b7094a in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#45 0x00007f5c73b70ed4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007f5c735216db in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f5c73b674f6 in QQmlInstanceModel::modelUpdated(QQmlChangeSet const&, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#48 0x00007f5c73b72158 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#49 0x00007f5c73b77c25 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007f5c73b77d98 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007f5c73b78d51 in QQmlDelegateModel::_q_itemsInserted(int, int) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007f5c73b7ecf5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007f5c73b7f05b in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#54 0x00007f5c735217ac in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f5c734ac46e in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007f5c734b3f89 in QAbstractItemModel::endInsertRows() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007f5c74c28efd in ResourcesProxyModel::sortedInsertion(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#58 0x00007f5c74c2a492 in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#59 0x00007f5c73521830 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f5c74c44842 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#61 0x00007f5c74c23444 in AggregatedResultsStream::emitResults() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#62 0x00007f5c74c23479 in AggregatedResultsStream::clear() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#63 0x00007f5c74c245a3 in AggregatedResultsStream::destruction(QObject*) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#64 0x00007f5c73521830 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x00007f5c73521d9f in QObject::destroyed(QObject*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007f5c7352863f in QObject::~QObject() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#67 0x00007f5c74c33b29 in ResultsStream::~ResultsStream() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#68 0x00007f5c73521fb0 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#69 0x00007f5c743524a1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#70 0x00007f5c74359ae0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007f5c734f8499 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#72 0x00007f5c734fb48b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#73 0x00007f5c7354ab23 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x00007f5c70d87c3e in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f5c70d87ed8 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f5c70d87f6c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007f5c7354a143 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#78 0x00007f5c6d36ee51 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#79 0x00007f5c734f716b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#80 0x00007f5c734ff2e2 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#81 0x000055d982f38b23 in  ()
#82 0x00007f5c72f3b09b in __libc_start_main (main=0x55d982f38550, argc=1, argv=0x7ffcf00f3458, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcf00f3448) at ../csu/libc-start.c:308
#83 0x000055d982f390ca in _start ()
[Inferior 1 (process 9514) detached]

Reported using DrKonqi