Application: plasma-discover (5.10.2)

Qt Version: 5.9.0
Frameworks Version: 5.35.0
Operating System: Linux 4.11.3-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
I started typing "plasma" into the search box and as I am a completely fresh convert from Gnome I pressed enter without thinking.
When I pressed Enter it crashed.
This happened a second time exact same situation
The third time I tried it didn't press enter and the search worked as it should.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe7491807c0 (LWP 26332))]

Thread 16 (Thread 0x7fe6eeecf700 (LWP 26353)):
#0  0x00007fe7410f06cc in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe744feefa8 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fe744fea3b4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7fe6ef6d0700 (LWP 26352)):
#0  0x00007fe7448ea02d in read () at /usr/lib/libc.so.6
#1  0x00007fe73efb16f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6d6db in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe73ef6dba0 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7fe6efed1700 (LWP 26349)):
#0  0x00007fe7448ee2bd in poll () at /usr/lib/libc.so.6
#1  0x00007fe73ef6dbf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6df92 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe7085ef426 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007fe73ef94ac5 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7fe6f06d2700 (LWP 26348)):
#0  0x00007fe7448ee2bd in poll () at /usr/lib/libc.so.6
#1  0x00007fe73ef6dbf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe73ef6dd51 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe73ef94ac5 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7fe709752700 (LWP 26347)):
#0  0x00007fe7410f06cc in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe744feefa8 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fe744fea3b4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7fe70a1e8700 (LWP 26346)):
#0  0x00007fe7410f06cc in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe744feefa8 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fe744fea3b4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fe70a9e9700 (LWP 26345)):
#0  0x00007fe7410f06cc in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe744feefa8 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007fe744fea3b4 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fe70b1ea700 (LWP 26344)):
#0  0x00007fe7448ea02d in read () at /usr/lib/libc.so.6
#1  0x00007fe73efb16f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6d6db in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe73ef6dba0 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fe70c09a700 (LWP 26343)):
#0  0x00007fe73ef6cb00 in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#1  0x00007fe73ef6dab5 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#7  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fe717562700 (LWP 26342)):
#0  0x00007fe7448ea02d in read () at /usr/lib/libc.so.6
#1  0x00007fe73efb16f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6d6db in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe73ef6dba0 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fe7484b0836 in  () at /usr/lib/libQt5Quick.so.5
#9  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fe719622700 (LWP 26340)):
#0  0x00007fe7410f039d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe71eee02fb in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007fe71eee0037 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fe71a7ba700 (LWP 26339)):
#0  0x00007fe7410f039d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe71eee02fb in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007fe71eee0037 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fe727fff700 (LWP 26336)):
#0  0x00007fe7448ee2bd in poll () at /usr/lib/libc.so.6
#1  0x00007fe73ef6dbf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fe745baa645 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fe72d882700 (LWP 26335)):
#0  0x00007fe7448ee2bd in poll () at /usr/lib/libc.so.6
#1  0x00007fe73ef6dbf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe745220e9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe744fe940a in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fe747358d45 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fe73617a700 (LWP 26334)):
#0  0x00007fe7448ee2bd in poll () at /usr/lib/libc.so.6
#1  0x00007fe73ecff8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fe73ed01679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fe738d4cd49 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fe744fedcbd in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fe7410ea297 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fe7448f825f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fe7491807c0 (LWP 26332)):
[KCrash Handler]
#5  0x00007fe7456286d0 in typeinfo for QObject () at /usr/lib/libQt5Core.so.5
#6  0x00007fe70c4efdaa in KNSCore::Engine::doRequest() () at /usr/lib/libKF5NewStuffCore.so.5
#7  0x00007fe70c7549ba in  () at /usr/lib/qt/plugins/discover/kns-backend.so
#8  0x00007fe7451f7e72 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#9  0x00007fe74678f46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#10 0x00007fe746796cf4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007fe7451c8b98 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#12 0x00007fe7451cb02d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fe745220a63 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007fe73ef6da47 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#15 0x00007fe73ef6dc78 in  () at /usr/lib/libglib-2.0.so.0
#16 0x00007fe73ef6dd0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#17 0x00007fe745220e7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#18 0x00007fe7451c721a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fe7451cfa74 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#20 0x000000000040d328 in  ()
#21 0x00007fe74482b43a in __libc_start_main () at /usr/lib/libc.so.6
#22 0x000000000040d64a in _start ()

Reported using DrKonqi