Bug 409987

Application: plasma-discover (5.16.3)

Qt Version: 5.13.0
Frameworks Version: 5.60.0
Operating System: Linux 5.2.0-zen1-1-zen x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- Unusual behavior I noticed: after the last update of kde on my computer, kde discovery start to crash, I tried restart the application but it didnt work, I rebooted the machine several time and log in the desktop without opening any other app, and KDE discovery crashed, I'm using arch linux

The crash can be reproduced sometimes.

-- Backtrace:
Application: Discover (plasma-discover), signal: Aborted
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f34ca596ec0 (LWP 14354))]

Thread 12 (Thread 0x7f348b7fe700 (LWP 14396)):
#0  0x00007f34cebb9e3d in syscall () at /usr/lib/libc.so.6
#1  0x00007f34cd09d11b in g_cond_wait_until () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd11a203 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cd0c1e4b in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f34cd0c8a31 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7f348a7fc700 (LWP 14376)):
#0  0x00007ffde111b605 in  ()
#1  0x00007f34cebccee3 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f34cf1552a2 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f34cf153b8a in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f34cf154156 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f34cf1556ff in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f34cd0eb360 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#7  0x00007f34cd0eb9a6 in  () at /usr/lib/libglib-2.0.so.0
#8  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#9  0x00007f34cf1559bc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#10 0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007f34cef2f2f5 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#12 0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#13 0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f34ad877700 (LWP 14369)):
#0  0x00007f34cebb018c in read () at /usr/lib/libc.so.6
#1  0x00007f34cd09c9f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0ea311 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cd0eba28 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f34cf1559bc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f34cef2f2f5 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f34ae44f700 (LWP 14368)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34cd0eba80 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cf1559bc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f34cef2f2f5 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f34affff700 (LWP 14365)):
[KCrash Handler]
#4  0x00007f34ceafd755 in raise () at /usr/lib/libc.so.6
#5  0x00007f34ceae8851 in abort () at /usr/lib/libc.so.6
#6  0x00007f34cd09c062 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007f34cd0c899d in g_assertion_message_expr () at /usr/lib/libglib-2.0.so.0
#8  0x00007f34ba03dee2 in  () at /usr/lib/libostree-1.so.1
#9  0x00007f34cccc9351 in g_object_unref () at /usr/lib/libgobject-2.0.so.0
#10 0x00007f34ba2514f4 in  () at /usr/lib/libflatpak.so.0
#11 0x00007f34cccc9351 in g_object_unref () at /usr/lib/libgobject-2.0.so.0
#12 0x00007f34ba2a6523 in flatpak_installation_update_appstream_full_sync () at /usr/lib/libflatpak.so.0
#13 0x00007f34c002cc9f in  () at /usr/lib/qt/plugins/discover/flatpak-backend.so
#14 0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#16 0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f34b887d700 (LWP 14364)):
[KCrash Handler]
#4  0x00007f34ceafd755 in raise () at /usr/lib/libc.so.6
#5  0x00007f34ceae8851 in abort () at /usr/lib/libc.so.6
#6  0x00007f34cd09c062 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007f34cd0c899d in g_assertion_message_expr () at /usr/lib/libglib-2.0.so.0
#8  0x00007f34ba03dee2 in  () at /usr/lib/libostree-1.so.1
#9  0x00007f34cccc9351 in g_object_unref () at /usr/lib/libgobject-2.0.so.0
#10 0x00007f34ba2514f4 in  () at /usr/lib/libflatpak.so.0
#11 0x00007f34cccc9351 in g_object_unref () at /usr/lib/libgobject-2.0.so.0
#12 0x00007f34ba2a6523 in flatpak_installation_update_appstream_full_sync () at /usr/lib/libflatpak.so.0
#13 0x00007f34c002cc9f in  () at /usr/lib/qt/plugins/discover/flatpak-backend.so
#14 0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#16 0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f34b907e700 (LWP 14363)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34cd0eba80 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0eca63 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34ccb469c8 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007f34cd0c8a31 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f34b987f700 (LWP 14362)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34cd0eba80 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cd0ebba2 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f34cd0c8a31 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f34c2c2e700 (LWP 14360)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34cd0eba80 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cf1559bc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f34cef2f2f5 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f34cf9138f9 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f34c3e3f700 (LWP 14358)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34cd0eba80 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f34cf1559bc in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f34cef2f2f5 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f34cfac8b37 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f34c972c700 (LWP 14356)):
#0  0x00007f34cebb4667 in poll () at /usr/lib/libc.so.6
#1  0x00007f34ccfef630 in  () at /usr/lib/libxcb.so.1
#2  0x00007f34ccff12db in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f34ca0f9049 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f34cef30520 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f34ce34957f in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f34cebbf0e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f34ca596ec0 (LWP 14354)):
[KCrash Handler]
#6  0x00007f34ceafd755 in raise () at /usr/lib/libc.so.6
#7  0x00007f34ceae8851 in abort () at /usr/lib/libc.so.6
#8  0x00007f34ceef58b6 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f34d0c5abc9 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () at /usr/lib/libQt5Quick.so.5
#10 0x00007f34d0c5bd2c in  () at /usr/lib/libQt5Quick.so.5
#11 0x00007f34d0c5c605 in  () at /usr/lib/libQt5Quick.so.5
#12 0x00007f34cff2534d in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#13 0x00007f34d0cddc33 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#14 0x00007f34d05334d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f34d053ca21 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f34cf0fd9c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f34cff1ad15 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /usr/lib/libQt5Gui.so.5
#18 0x00007f34cff1af48 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#19 0x00007f34cfef337c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#20 0x00007f34ca0f9fec in  () at /usr/lib/libQt5XcbQpa.so.5
#21 0x00007f34cd0e9cf4 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#22 0x00007f34cd0ebb11 in  () at /usr/lib/libglib-2.0.so.0
#23 0x00007f34cd0ebb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#24 0x00007f34cf1559a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#25 0x00007f34cf0fc5ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007f34cf104326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#27 0x00005618877a16ed in  ()
#28 0x00007f34ceae9ee3 in __libc_start_main () at /usr/lib/libc.so.6
#29 0x00005618877a1cae in _start ()
[Inferior 1 (process 14354) detached]

Reported using DrKonqi