https://bugs.kde.org/show_bug.cgi?id=390196

            Bug ID: 390196
           Summary: Discover crash
           Product: Discover
           Version: 5.12.0
          Platform: Ubuntu Packages
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: discover
          Assignee: aleix...@kde.org
          Reporter: bund...@gmail.com
  Target Milestone: ---

Application: plasma-discover (5.12.0)

Qt Version: 5.9.3
Frameworks Version: 5.42.0
Operating System: Linux 4.15.2-041502-generic x86_64
Distribution: Ubuntu Bionic Beaver (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
Browsing through system addons. Was about to go shopping for apps when Discover
shut down.


- Unusual behavior I noticed:
Desktop has been glitching. Don't know if it's new drivers or recent upgrade to
Kubuntu 18.04.

-- 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 0x7f8ed126d900 (LWP 6551))]

Thread 13 (Thread 0x7f8e94cce700 (LWP 6710)):
#0  0x00007f8ec9176072 in futex_wait_cancelable (private=<optimized out>,
expected=0, futex_word=0x55cdf779946c) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8ec9176072 in __pthread_cond_wait_common (abstime=0x0,
mutex=0x55cdf7799418, cond=0x55cdf7799440) at pthread_cond_wait.c:502
#2  0x00007f8ec9176072 in __pthread_cond_wait (cond=0x55cdf7799440,
mutex=0x55cdf7799418) at pthread_cond_wait.c:655
#3  0x00007f8eab14509b in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#4  0x00007f8eab144dc7 in  () at /usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so
#5  0x00007f8ec916f7fc in start_thread (arg=0x7f8e94cce700) at
pthread_create.c:465
#6  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f8e7dbe6700 (LWP 6592)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x7f8e7007d730, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec7233169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ec916f7fc in start_thread (arg=0x7f8e7dbe6700) at
pthread_create.c:465
#8  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f8e7e3e7700 (LWP 6591)):
#0  0x00007f8ec72785b9 in g_mutex_lock () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8ec723312e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ec916f7fc in start_thread (arg=0x7f8e7e3e7700) at
pthread_create.c:465
#8  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f8e7ffff700 (LWP 6574)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x7f8e74034ba0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec7233169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ec916f7fc in start_thread (arg=0x7f8e7ffff700) at
pthread_create.c:465
#8  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8e85386700 (LWP 6561)):
#0  0x00007f8ecc94c06d in __GI___libc_read (fd=23, buf=0x7f8e85385bd0,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f8ec7277280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec7232c4b in g_main_context_check () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ec7233110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8ec7233502 in g_main_loop_run () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8e86fbcb26 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f8ec725a645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f8ec916f7fc in start_thread (arg=0x7f8e85386700) at
pthread_create.c:465
#8  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f8e85b87700 (LWP 6560)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x55cdf7c29d90, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec7233169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ec72332c1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8ec725a645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8ec916f7fc in start_thread (arg=0x7f8e85b87700) at
pthread_create.c:465
#6  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8e954cf700 (LWP 6558)):
#0  0x00007f8ecc96b1af in __libc_enable_asynccancel () at
../sysdeps/unix/sysv/linux/x86_64/cancellation.S:67
#1  0x00007f8ecc94c05d in __GI___libc_read (fd=20, buf=0x7f8e954cea90,
nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:26
#2  0x00007f8ec7277280 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ec7232c4b in g_main_context_check () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8ec7233110 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8ec916f7fc in start_thread (arg=0x7f8e954cf700) at
pthread_create.c:465
#11 0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8e96a2f700 (LWP 6557)):
#0  0x00007f8ec72785d4 in g_mutex_unlock () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8ec7232d09 in g_main_context_dispatch () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec72331f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ec916f7fc in start_thread (arg=0x7f8e96a2f700) at
pthread_create.c:465
#9  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8ea055f700 (LWP 6556)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x7f8e98004f00, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec7233169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ed044eb46 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ec916f7fc in start_thread (arg=0x7f8ea055f700) at
pthread_create.c:465
#9  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8eb33cf700 (LWP 6555)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x7f8ea40029e0, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec7233169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecdc73065 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ec916f7fc in start_thread (arg=0x7f8eb33cf700) at
pthread_create.c:465
#9  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8eb45e7700 (LWP 6554)):
#0  0x00007f8ecd053a4f in QMutex::unlock() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f8ecd2932af in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f8ec72326a8 in g_main_context_prepare () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8ec723309b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8ecd29337b in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8ecd05726a in QThread::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8ecef55d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8ec916f7fc in start_thread (arg=0x7f8eb45e7700) at
pthread_create.c:465
#11 0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8ebd68f700 (LWP 6553)):
#0  0x00007f8ecc950951 in __GI___poll (fds=0x7f8ebd68ebb8, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8ec6fcb747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8ec6fcd53a in xcb_wait_for_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8ebfc1a0e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f8ecd05c1ad in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8ec916f7fc in start_thread (arg=0x7f8ebd68f700) at
pthread_create.c:465
#6  0x00007f8ecc95cb5f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8ed126d900 (LWP 6551)):
[KCrash Handler]
#6  0x00007f8ed0502614 in QQuickItem::isVisible() const () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8ed0506395 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f8ed0506fcc in QQuickItem::inputMethodQuery(Qt::InputMethodQuery)
const () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007f8ed050e88e in QQuickItem::event(QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f8ece84c5bc in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f8ece853e84 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f8ecd23a4c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f8ece0916fd in
QGuiApplicationPrivate::_q_updateFocusObject(QObject*) () at
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#14 0x00007f8ece0919a5 in
QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate::ActivatedWindowEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#15 0x00007f8ece091d4d in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f8ece069cab in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#17 0x00007f8ebfc7cf50 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#18 0x00007f8ec7232fb7 in g_main_context_dispatch () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f8ec72331f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f8ec723327c in g_main_context_iteration () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f8ecd29335f in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f8ecd23851a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f8ecd241484 in QCoreApplication::exec() () at
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x000055cdf58e4008 in  ()
#25 0x00007f8ecc8691c1 in __libc_start_main (main=0x55cdf58e3730, argc=1,
argv=0x7ffc2343c108, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffc2343c0f8) at ../csu/libc-start.c:308
#26 0x000055cdf58e41ea in _start ()

Reported using DrKonqi

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