Bug 417518

Application: plasma-discover (5.12.8)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-76-generic x86_64
Distribution: Ubuntu 18.04.4 LTS

-- Information about the crash:
Have to do apt update && apt upgrade from the command line, Discover won't launch.

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 0x7fb2e2ec4800 (LWP 19553))]

Thread 12 (Thread 0x7fb28ffff700 (LWP 19567)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x7fb284011a30, nfds=1, timeout=6374) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb2ddd666db in start_thread (arg=0x7fb28ffff700) at pthread_create.c:463
#8  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fb2a194a700 (LWP 19566)):
#0  0x00007fb2ddd6ced9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fb2a1949c40, expected=0, futex_word=0x7fb290006fc0) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb2ddd6ced9 in __pthread_cond_wait_common (abstime=0x7fb2a1949d00, mutex=0x7fb290006f70, cond=0x7fb290006f98) at pthread_cond_wait.c:533
#2  0x00007fb2ddd6ced9 in __pthread_cond_timedwait (cond=0x7fb290006f98, mutex=0x7fb290006f70, abstime=0x7fb2a1949d00) at pthread_cond_wait.c:667
#3  0x00007fb2de9a9468 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2de9a553d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2ddd666db in start_thread (arg=0x7fb2a194a700) at pthread_create.c:463
#7  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fb2a214b700 (LWP 19565)):
#0  0x00007fb2ddd6ced9 in futex_reltimed_wait_cancelable (private=<optimized out>, reltime=0x7fb2a214ac40, expected=0, futex_word=0x7fb2900042f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:142
#1  0x00007fb2ddd6ced9 in __pthread_cond_wait_common (abstime=0x7fb2a214ad00, mutex=0x7fb2900042a0, cond=0x7fb2900042c8) at pthread_cond_wait.c:533
#2  0x00007fb2ddd6ced9 in __pthread_cond_timedwait (cond=0x7fb2900042c8, mutex=0x7fb2900042a0, abstime=0x7fb2a214ad00) at pthread_cond_wait.c:667
#3  0x00007fb2de9a9468 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2de9a553d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2ddd666db in start_thread (arg=0x7fb2a214b700) at pthread_create.c:463
#7  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fb2a294c700 (LWP 19564)):
#0  0x00007fb2de2b2746 in __libc_disable_asynccancel () at ../sysdeps/unix/sysv/linux/x86_64/cancellation.S:89
#1  0x00007fb2de296c0d in __GI___poll (fds=0x7fb2880018c0, nfds=1, timeout=6393) at ../sysdeps/unix/sysv/linux/poll.c:29
#2  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2ddd666db in start_thread (arg=0x7fb2a294c700) at pthread_create.c:463
#9  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fb2a8970700 (LWP 19560)):
#0  0x00007fb2d8a854a2 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2d8a87a63 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a884fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2ddd666db in start_thread (arg=0x7fb2a8970700) at pthread_create.c:463
#9  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fb2a9171700 (LWP 19559)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x55a42333e030, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a88962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2acfbd0e6 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fb2d8ab0195 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb2ddd666db in start_thread (arg=0x7fb2a9171700) at pthread_create.c:463
#6  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb2a9972700 (LWP 19558)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x55a42332af40, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2d8a88721 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2d8ab0195 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb2ddd666db in start_thread (arg=0x7fb2a9972700) at pthread_create.c:463
#6  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb2bd1f3700 (LWP 19557)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x7fb2b0004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2e1d832a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2ddd666db in start_thread (arg=0x7fb2bd1f3700) at pthread_create.c:463
#9  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb2c605c700 (LWP 19556)):
#0  0x00007fb2d8ace649 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb2d8a87b33 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a884fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fb2df5b96f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb2ddd666db in start_thread (arg=0x7fb2c605c700) at pthread_create.c:463
#10 0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb2c726d700 (LWP 19555)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x7fb2c0019290, nfds=1, timeout=1375) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d8a885c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb2debdf8ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2de9a323a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fb2dfd94d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fb2ddd666db in start_thread (arg=0x7fb2c726d700) at pthread_create.c:463
#9  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb2d07b6700 (LWP 19554)):
#0  0x00007fb2de296bf9 in __GI___poll (fds=0x7fb2d07b5ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb2d881f747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb2d882136a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb2d35635e9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fb2de9a817d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fb2ddd666db in start_thread (arg=0x7fb2d07b6700) at pthread_create.c:463
#6  0x00007fb2de2a388f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb2e2ec4800 (LWP 19553)):
[KCrash Handler]
#6  0x00007fb2de1c0e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007fb2de1c2801 in __GI_abort () at abort.c:79
#8  0x00007fb2de992fb7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fb2e1de62a7 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fb2e1de7275 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fb2e1de7e9a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fb2e06aa3d5 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007fb2e1e5c6c5 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fb2e0e5a83c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fb2e0e62104 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fb2deb868d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fb2e069f49f in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#18 0x00007fb2e06a00dd in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fb2e06772eb in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007fb2d35c8260 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#21 0x00007fb2d8a88417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fb2d8a88650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fb2d8a886dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fb2debdf88f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fb2deb8490a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fb2deb8d9b4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x000055a421951148 in  ()
#28 0x00007fb2de1a3b97 in __libc_start_main (main=0x55a421950870, argc=1, argv=0x7fffd56262d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffd56262c8) at ../csu/libc-start.c:310
#29 0x000055a4219513ca in _start ()

Reported using DrKonqi