*AppName* closed unexpectedly or Alt+F4 does not work

[Денис]

-- Information about the crash:
Having Compiz windows manager running the every window closing by means of pressing Alt+F4 buttons I recieve the crash report, e.g.
Konsole closed unexpectedly.

After resuming the session Alt+F4 stops to work - no applications can be closed by this shortcut.

the corresponding KDE's bug report is https://bugs.kde.org/show_bug.cgi?id=412733

Application: dolphin (19.04.3)

Qt Version: 5.12.2
Frameworks Version: 5.62.0
Operating System: Linux 5.0.0-31-generic x86_64
Distribution: Ubuntu 19.04

The crash can be reproduced every time.

-- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f56db6d6c80 (LWP 3356))]

Thread 3 (Thread 0x7f56d968b700 (LWP 3358)):
#0 0x00007f56e27f6729 in __GI___poll (fds=0x7f56cc012b90, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f56de672bf6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f56de672d1c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f56e0882063 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007f56e082d5bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007f56e06782c6 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007f56e0afa565 in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7 0x00007f56e0679612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007f56def35182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9 0x00007f56e2802b1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f56da423700 (LWP 3357)):
#0 0x00007f56e27f6729 in __GI___poll (fds=0x7f56da422ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007f56de4c0917 in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2 0x00007f56de4c253a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3 0x00007f56db0136a8 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4 0x00007f56e0679612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007f56def35182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6 0x00007f56e2802b1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f56db6d6c80 (LWP 3356)):
[KCrash Handler]
#6 0x0000000000000018 in ?? ()
#7 0x00007f56e0cd42d6 in QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate::ActivatedWindowEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#8 0x00007f56e0cd916d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#9 0x00007f56e0cb305b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#10 0x00007f56db01467a in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#11 0x00007f56de6729ee in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f56de672c88 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f56de672d1c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f56e0882047 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f56e082d5bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f56e08355e2 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f56e2914151 in kdemain () from /lib/x86_64-linux-gnu/libkdeinit5_dolphin.so
#18 0x00007f56e270bb6b in __libc_start_main (main=0x562850938050, argc=2, argv=0x7fff72624a08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff726249f8) at ../csu/libc-start.c:308
#19 0x000056285093808a in _start ()
[Inferior 1 (process 3356) detached]

Possible duplicates by query: bug 410638, bug 404702, bug 401513.

Reported using DrKonqi