Bug 391767

Application: systemsettings5 (5.12.2)

Qt Version: 5.10.1
Frameworks Version: 5.43.0
Operating System: Linux 4.15.7-1-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
I opened System Settings, then selected Printers. I was asked to enter user login and password. Root login was prefilled. I changed it to my user name (I'm sudoer) and entered password. Then System Settings crashed. I was unable to reproduce.

The crash does not seem to be reproducible.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f4fe7005800 (LWP 2726))]

Thread 10 (Thread 0x7f4f8095f700 (LWP 3016)):
#0  0x00007f4fe29ec97b in poll () at /usr/lib/libc.so.6
#1  0x00007f4fdc50dff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fe3338314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4fe30e97ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f4f451091ba in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#7  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f4f56361700 (LWP 2995)):
#0  0x00007f4fe29ec97b in poll () at /usr/lib/libc.so.6
#1  0x00007f4fdc50dff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fe3338314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4fe30e97ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f4fe0c0f379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f4fa9f49700 (LWP 2915)):
#0  0x00007f4fdeb663bd in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f4fe2d6b5bd in __gthread_cond_wait (__mutex=<optimized out>, __cond=<optimized out>) at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:864
#2  0x00007f4fe2d6b5bd in std::condition_variable::wait(std::unique_lock<std::mutex>&) (this=<optimized out>, __lock=...) at /build/gcc/src/gcc/libstdc++-v3/src/c++11/condition_variable.cc:53
#3  0x00007f4f5ca08d09 in  () at /usr/lib/libQt5WebKit.so.5
#4  0x00007f4f5ca08e59 in  () at /usr/lib/libQt5WebKit.so.5
#5  0x00007f4fe2d71b9f in std::execute_native_thread_routine(void*) (__p=0x55676c1940a0) at /build/gcc/src/gcc/libstdc++-v3/src/c++11/thread.cc:83
#6  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f4f9a7e8700 (LWP 2896)):
#0  0x00007f4fe29e83d8 in read () at /usr/lib/libc.so.6
#1  0x00007f4fdc5537d1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50dac8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fdc50df96 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4fdc50e3b2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#5  0x00007f4f67fac6d8 in  () at /usr/lib/libgio-2.0.so.0
#6  0x00007f4fdc53626a in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f4fa8f08700 (LWP 2895)):
#0  0x00007f4fdc554b94 in g_mutex_unlock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f4fdc50dfad in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fdc50e162 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4fdc53626a in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f4fb3cff700 (LWP 2732)):
#0  0x00007f4fe29ec97b in poll () at /usr/lib/libc.so.6
#1  0x00007f4fdc50dff3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fe3338314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4fe30e97ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f4fe0c0f379 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f4fbbf31700 (LWP 2731)):
#0  0x00007f4fe29e83d8 in read () at /usr/lib/libc.so.6
#1  0x00007f4fdc5537d1 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50dac8 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fdc50df96 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f4fe3338314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f4fe30e97ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f4fe0c0f379 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f4fca8dc700 (LWP 2729)):
#0  0x00007f4fdc554b79 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f4fdc50d386 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007f4fdc50df1e in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4fdc50e10e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4fe3338314 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f4fe30e97ae in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f4fe4c62416 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f4fd3930700 (LWP 2728)):
#0  0x00007f4fe29ec97b in poll () at /usr/lib/libc.so.6
#1  0x00007f4fde6eb8e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f4fde6ed679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f4fd66dd82a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f4fe30eeb4d in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f4fdeb6008c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f4fe29f6e7f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f4fe7005800 (LWP 2726)):
[KCrash Handler]
#5  0x00007f4fe111a4e4 in QQuickItem::isVisible() const () at /usr/lib/libQt5Quick.so.5
#6  0x00007f4fe111a5fa in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f4fe111a29d in QQuickItemPrivate::filterKeyEvent(QKeyEvent*, bool) () at /usr/lib/libQt5Quick.so.5
#8  0x00007f4fe1126cc6 in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#9  0x00007f4fe1127026 in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#10 0x00007f4fe42f4fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007f4fe42fc9c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007f4fe32dbda0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007f4fe1132b9a in QQuickWindowPrivate::deliverKeyEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#14 0x00007f4fe1137e36 in QQuickWindow::keyReleaseEvent(QKeyEvent*) () at /usr/lib/libQt5Quick.so.5
#15 0x00007f4fe3af6865 in QWindow::event(QEvent*) () at /usr/lib/libQt5Gui.so.5
#16 0x00007f4fe1141ea6 in QQuickWindow::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#17 0x00007f4fe42f4fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#18 0x00007f4fe42fc9c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#19 0x00007f4fe32dbda0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#20 0x00007f4fe17c859d in QQuickWidget::keyReleaseEvent(QKeyEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#21 0x00007f4fe4335188 in QWidget::event(QEvent*) () at /usr/lib/libQt5Widgets.so.5
#22 0x00007f4fe17c9f0c in QQuickWidget::event(QEvent*) () at /usr/lib/libQt5QuickWidgets.so.5
#23 0x00007f4fe42f4fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007f4fe42fdf53 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007f4fe32dbda0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007f4fe435304b in  () at /usr/lib/libQt5Widgets.so.5
#27 0x00007f4fe42f4fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#28 0x00007f4fe42fc9c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#29 0x00007f4fe32dbda0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#30 0x00007f4fe3ae6e12 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () at /usr/lib/libQt5Gui.so.5
#31 0x00007f4fe3aebf66 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib/libQt5Gui.so.5
#32 0x00007f4fe3ac329c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Gui.so.5
#33 0x00007f4fd676548d in  () at /usr/lib/libQt5XcbQpa.so.5
#34 0x00007f4fe32da3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007f4fe32e37d8 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#36 0x00005567683edd30 in  ()
#37 0x00007f4fe2921f4a in __libc_start_main () at /usr/lib/libc.so.6
#38 0x00005567683eddba in _start ()

Reported using DrKonqi