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Reading symbols from /usr/bin/ark...Reading symbols from /usr/lib/debug/usr/bin/ark.debug...done.
done.
Attaching to program: /usr/bin/ark, process 23362
[New LWP 23363]
[New LWP 23364]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
0x00007f84610458ed in nanosleep () at ../sysdeps/unix/syscall-template.S:84
84      T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
(gdb) bt all
No symbol "all" in current context.
(gdb) backtrace
#0  0x00007f84610458ed in nanosleep () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f846104583a in __sleep (seconds=0, seconds@entry=1) at ../sysdeps/posix/sleep.c:55
#2  0x00007f84667fe5f3 in startProcessInternal(int, char const**, bool, bool) (argc=19, argv=<optimized out>, waitAndExit=waitAndExit@entry=true, directly=directly@entry=false)                                  
    at /usr/src/debug/kcrash-5.25.0/src/kcrash.cpp:650                                                                                                                                                            
#3  0x00007f84667fec59 in KCrash::startProcess(int, char const**, bool) (argc=argc@entry=19, argv=argv@entry=0x7fff9f5f8370, waitAndExit=waitAndExit@entry=true)                                                  
    at /usr/src/debug/kcrash-5.25.0/src/kcrash.cpp:616                                                                                                                                                            
#4  0x00007f84667ff0ce in KCrash::defaultCrashHandler(int) (sig=<optimized out>) at /usr/src/debug/kcrash-5.25.0/src/kcrash.cpp:527                                                                               
#5  0x00007f8460fb1770 in <signal handler called> () at /lib64/libc.so.6                                                                                                                                          
#6  0x000055af80000012 in  ()                                                                                                                                                                                     
#7  0x00007f8461e5540f in QObject::disconnect(QObject const*, char const*, QObject const*, char const*) (sender=0x55af27df2b30, signal=signal@entry=0x0, receiver=receiver@entry=0x55af27df3710, method=method@entry=0x0) at kernel/qobject.cpp:2949                                                                                                                                                                                
#8  0x00007f8462e5492f in KJobTrackerInterface::unregisterJob(KJob*) (member=0x0, receiver=0x55af27df3710, this=<optimized out>) at /usr/include/qt5/QtCore/qobject.h:361                                         
#9  0x00007f8462e5492f in KJobTrackerInterface::unregisterJob(KJob*) (this=this@entry=0x55af27df3710, job=<optimized out>) at /usr/src/debug/kcoreaddons-5.25.0/src/lib/jobs/kjobtrackerinterface.cpp:81          
#10 0x00007f84652c6920 in KUiServerJobTracker::unregisterJob(KJob*) (this=0x55af27df3710, job=<optimized out>) at /usr/src/debug/kjobwidgets-5.25.0/src/kuiserverjobtracker.cpp:141                               
#11 0x00007f8462e54a75 in KJobTrackerInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>)                    
    at /usr/src/debug/kcoreaddons-5.25.0/x86_64-redhat-linux-gnu/src/lib/moc_kjobtrackerinterface.cpp:121                                                                                                         
#12 0x00007f8461e52bd9 in QObject::event(QEvent*) (this=0x55af27df3710, e=<optimized out>) at kernel/qobject.cpp:1256                                                                                             
#13 0x00007f84626bcc0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55af27df3710, e=0x7f843c00fe80) at kernel/qapplication.cpp:3804                                 
#14 0x00007f84626c20ef in QApplication::notify(QObject*, QEvent*) (this=0x7fff9f5f9460, receiver=0x55af27df3710, e=0x7f843c00fe80) at kernel/qapplication.cpp:3561                                                
#15 0x00007f8461e297aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55af27df3710, event=event@entry=0x7f843c00fe80) at kernel/qcoreapplication.cpp:1015                                    
#16 0x00007f8461e2b84f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x7f843c00fe80, receiver=<optimized out>) at kernel/qcoreapplication.h:225                                
#17 0x00007f8461e2b84f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x55af27ceee70)                                
    at kernel/qcoreapplication.cpp:1650                                                                                                                                                                           
#18 0x00007f8461e2bd68 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1508                                      
#19 0x00007f8461e791b3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x55af27d35660) at kernel/qeventdispatcher_glib.cpp:270                                                                     
#20 0x00007f845dcf46ba in g_main_context_dispatch (context=0x7f84400016f0) at gmain.c:3154
#21 0x00007f845dcf46ba in g_main_context_dispatch (context=context@entry=0x7f84400016f0) at gmain.c:3769
#22 0x00007f845dcf4a70 in g_main_context_iterate (context=context@entry=0x7f84400016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3840
#23 0x00007f845dcf4b1c in g_main_context_iteration (context=0x7f84400016f0, may_block=may_block@entry=1) at gmain.c:3901
#24 0x00007f8461e7922f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55af27d38430, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#25 0x00007f8461e285ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fff9f5f9310, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#26 0x00007f8461e3017c in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1285
#27 0x000055af27505585 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/ark-16.04.3/app/main.cpp:299
(gdb)

Reproducible: Didn't try