Application: apper (0.9.3)

Qt Version: 5.9.2
Frameworks Version: 5.42.0
Operating System: Linux 4.14.0-3-amd64 x86_64
Distribution: Debian GNU/Linux testing (buster)

-- Information about the crash:
I started apper with no arguments or options, the application crashes without show it main window. The problems occurred after restarting the system and reinstall the application, too.

If I rund it from terminal emulator sometimes it outputs something like this:
„QCommandLineParser: option not defined: "install-mime-type"
QCommandLineParser: option not defined: "install-package-name"
QCommandLineParser: option not defined: "install-provide-file"
QCommandLineParser: option not defined: "install-catalog"
QCommandLineParser: option not defined: "remove-package-by-file"
kf5.kwidgetsaddons: Invalid pixmap specified.
kf5.kwidgetsaddons: Invalid pixmap specified.
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = apper path = /usr/bin pid = 32159
KCrash: Arguments: /usr/bin/apper 
KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi from kdeinit
sock_file=/run/user/1000/kdeinit5__0”

And sometimes something like this:
„QSocketNotifier: Invalid socket 8 and type 'Read', disabling...
QSocketNotifier: Invalid socket 12 and type 'Read', disabling...
QSocketNotifier: Invalid socket 9 and type 'Read', disabling...”

Followed by bash output

„[1]+  Exit 253                apper“

The crash can be reproduced every time.

-- Backtrace:
Application: apper (apper), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3af4ac0940 (LWP 29029))]

Thread 3 (Thread 0x7f3ada234700 (LWP 29031)):
#0  0x00007f3aeb1f7908 in read () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f3aedc57230 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3aedc12c07 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3aedc130c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3aedc1322c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3aec09210b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3aec0372aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3aebe5635a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f3af0756e45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f3aebe5b22d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f3ae8f7951a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f3aeb2063ef in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7f3adc764700 (LWP 29030)):
#0  0x00007f3aeb1fbe6b in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f3ae8495150 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3ae8496ee9 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3ade8c7029 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f3aebe5b22d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3ae8f7951a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f3aeb2063ef in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7f3af4ac0940 (LWP 29029)):
[KCrash Handler]
#6  0x00007f3af46e4aea in KCModuleProxy::realModule() const () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#7  0x0000557fe23849a6 in MainUi::MainUi(QWidget*) ()
#8  0x0000557fe23891b7 in Apper::showUi() ()
#9  0x00007f3aec0688c2 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f3aecf198d4 in QGuiApplication::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007f3aeeab34ef in QApplication::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f3aeeaad63c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f3aeeab4f04 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f3aec039258 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f3aec03b9cd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f3aec092ac3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f3aedc12f67 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f3aedc131a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f3aedc1322c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f3aec0920ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f3aec0372aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f3aec040214 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x0000557fe23843e7 in main ()