Application: plasma-discover (5.12.8)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 5.4.0-48-generic x86_64
Distribution: Ubuntu 18.04.5 LTS

-- Information about the crash:
- What I was doing when the application crashed: clicked updates icon in tray.  Icon showed updates were available.  Got an error installing nvidia documentation package.   Closed updates, clicked update icon again, got crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f0a2b5b1800 (LWP 17557))]

Thread 10 (Thread 0x7f09dabe7700 (LWP 17571)):
#0  0x00007f0a213c2644 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f0a2137bb18 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c4fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f0a234ab6db in start_thread (arg=0x7f09dabe7700) at pthread_create.c:463
#9  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f09f1706700 (LWP 17567)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x7f09cc002940, nfds=4, timeout=30325) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f0a234ab6db in start_thread (arg=0x7f09f1706700) at pthread_create.c:463
#8  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f09f35b9700 (LWP 17564)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x7f09e8003de0, nfds=1, timeout=10325) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f0a234ab6db in start_thread (arg=0x7f09f35b9700) at pthread_create.c:463
#8  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f09f3dba700 (LWP 17563)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x55e00c864220, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09f5bf9276 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f0a213a4175 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0a234ab6db in start_thread (arg=0x7f09f3dba700) at pthread_create.c:463
#6  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f09f45bb700 (LWP 17562)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x55e00c8511d0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a2137c721 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0a213a4175 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0a234ab6db in start_thread (arg=0x7f09f45bb700) at pthread_create.c:463
#6  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f09ffde1700 (LWP 17561)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x7f09f8004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a2a6782a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f0a234ab6db in start_thread (arg=0x7f09ffde1700) at pthread_create.c:463
#9  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f0a0eab9700 (LWP 17560)):
#0  0x00007f0a26b871c4 in __GI___libc_read (fd=9, buf=0x7f0a0eab8b70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f0a213c12b0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c0b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a2137c570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f0a27eae6f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f0a234ab6db in start_thread (arg=0x7f0a0eab9700) at pthread_create.c:463
#11 0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f0a0fcca700 (LWP 17559)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x7f0a08019230, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a2137c5c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a274d48ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a2729823a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f0a28689d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f0a234ab6db in start_thread (arg=0x7f0a0fcca700) at pthread_create.c:463
#9  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f0a190aa700 (LWP 17558)):
#0  0x00007f0a26b8bcf9 in __GI___poll (fds=0x7f0a190a9ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f0a21113747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f0a2111536a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f0a1be575e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f0a2729d17d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f0a234ab6db in start_thread (arg=0x7f0a190aa700) at pthread_create.c:463
#6  0x00007f0a26b98a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f0a2b5b1800 (LWP 17557)):
[KCrash Handler]
#6  0x00007f0a26ab5f47 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f0a26ab78b1 in __GI_abort () at abort.c:79
#8  0x00007f0a27287fb7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f0a2a6db2a7 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f0a2a6dc275 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f0a2a6dce9a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f0a28f9f3d5 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f0a2a7516c5 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007f0a2974f83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f0a29757104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f0a2747b8d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f0a28f9449f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007f0a28f950dd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007f0a28f6c2eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007f0a1bebc260 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007f0a2137c417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f0a2137c650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f0a2137c6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f0a274d488f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f0a2747990a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f0a274829b4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000055e00b446148 in  ()
#28 0x00007f0a26a98b97 in __libc_start_main (main=0x55e00b445870, argc=3, argv=0x7ffd7265d1f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd7265d1e8) at ../csu/libc-start.c:310
#29 0x000055e00b4463ca in _start ()

Reported using DrKonqi