Bug 391556

kubuntu: 16.04.4 LTS
KDE: 5.8.8
KDE frameworks: 5.36.0
Qt: 5.6.1

Application: kcmshell5 (kcmshell5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
[Current thread is 1 (Thread 0x7f84f8db78c0 (LWP 2389))]

Thread 2 (Thread 0x7f84dee48700 (LWP 2391)):
[KCrash Handler]
#6  0x00007f84f67b26c7 in QObject::disconnect(QObject const*, char const*, QObject const*, char const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f84f8f25330 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f84f8f125f6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f84f65ad808 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f84f40126ba in start_thread (arg=0x7f84dee48700) at pthread_create.c:333
#11 0x00007f84f88b541d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f84f8db78c0 (LWP 2389)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f84f65ae6bb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f84f65ad3b6 in QThread::wait(unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f84f8f12386 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#4  0x00007f84f8f12419 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#5  0x00007f84f87e7ff8 in __run_exit_handlers (status=0, listp=0x7f84f8b725f8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:82
#6  0x00007f84f87e8045 in __GI_exit (status=<optimized out>) at exit.c:104
#7  0x00007f84f87ce837 in __libc_start_main (main=0x4006d0, argc=2, argv=0x7fff1d353978, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff1d353968) at ../csu/libc-start.c:325
#8  0x0000000000400709 in _start ()