Bug 428395

korgac is using a lot of CPU cores at 100% usage. I attach GDB backtrace 

korganizer-20.08.2-1.fc33.x86_64
KDE Frameworks 5.75.0
Qt 5.15.1 

$ gdb korgac 2969
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Reading symbols from korgac...
Reading symbols from .gnu_debugdata for /usr/bin/korgac...
(No debugging symbols found in .gnu_debugdata for /usr/bin/korgac)
Attaching to program: /usr/bin/korgac, process 2969
[New LWP 3179]
[New LWP 3184]
[New LWP 3189]

warning: .dynamic section for "/lib64/libKF5Service.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5WidgetsAddons.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5CoreAddons.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5Contacts.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5ItemModels.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5KIOGui.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5XmlGui.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5ConfigWidgets.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5ConfigGui.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5KCMUtils.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5Prison.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5SyntaxHighlighting.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5NewStuff.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5PurposeWidgets.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5Purpose.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5NewStuffCore.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5Package.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/usr/lib64/qt5/plugins/platformthemes/KDEPlasmaPlatformTheme.so" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5KIOFileWidgets.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/lib64/libKF5Solid.so.5" is not at the expected address (wrong library or version mismatch?)

warning: .dynamic section for "/usr/lib64/qt5/plugins/styles/breeze.so" is not at the expected address (wrong library or version mismatch?)

warning: Could not load shared library symbols for /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemKWaylandPlugin.so.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
0x00007f295e83ba0f in poll () from /lib64/libc.so.6
(gdb) set height 0
(gdb) set print elements 0
(gdb) set print frame-arguments all
(gdb) thread apply all backtrace

Thread 4 (Thread 0x7f294958d640 (LWP 3189)):
#0  0x00007f295e83742c in read () from /lib64/libc.so.6
#1  0x00007f295c9f747c in g_main_context_check () from /lib64/libglib-2.0.so.0
#2  0x00007f295ca47cc5 in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0
#3  0x00007f295c9f441f in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f295edb8a4b in QEventDispatcherGlib::processEvents (this=0x7f2940000b60, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f295ed6c65b in QEventLoop::exec (this=0x7f294958cb80, flags={i = 36}) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#6  0x00007f295ebdb2e7 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f295ebdc4bc in QThreadPrivate::start (arg=0x56253cd7ab50) at thread/qthread_unix.cpp:329
#8  0x00007f295d31a3f9 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f295e846b03 in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f2949d8e640 (LWP 3184)):
#0  0x00007f295eba57c0 in __tls_get_addr@plt () from /lib64/libQt5Core.so.5
#1  0x00007f295ebdbbd6 in get_thread_data () at thread/qthread_unix.cpp:207
#2  QThreadData::current (createIfNecessary=<optimized out>) at thread/qthread_unix.cpp:207
#3  0x00007f295edb88fa in postEventSourcePrepare (s=0x7f293c004bb0, timeout=0x7f2949d8d9a4) at kernel/qeventdispatcher_glib.cpp:253
#4  0x00007f295c9f6c5a in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#5  0x00007f295ca47c4b in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0
#6  0x00007f295c9f441f in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#7  0x00007f295edb8a4b in QEventDispatcherGlib::processEvents (this=0x7f293c000b60, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:425
#8  0x00007f295ed6c65b in QEventLoop::exec (this=0x7f2949d8db80, flags={i = 36}) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#9  0x00007f295ebdb2e7 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#10 0x00007f295ebdc4bc in QThreadPrivate::start (arg=0x56253cd6f5e0) at thread/qthread_unix.cpp:329
#11 0x00007f295d31a3f9 in start_thread () from /lib64/libpthread.so.0
#12 0x00007f295e846b03 in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f294af9f640 (LWP 3179)):
#0  0x00007f295e83ba0f in poll () from /lib64/libc.so.6
#1  0x00007f295ca47d1e in g_main_context_iterate.constprop () from /lib64/libglib-2.0.so.0
#2  0x00007f295c9f441f in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f295edb8a4b in QEventDispatcherGlib::processEvents (this=0x7f2944000b60, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f295ed6c65b in QEventLoop::exec (this=0x7f294af9eb30, flags={i = 36}) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007f295ebdb2e7 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007f295f04ba47 in QDBusConnectionManager::run (this=0x7f295f0b9060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:179
#7  0x00007f295ebdc4bc in QThreadPrivate::start (arg=0x7f295f0b9060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:329
#8  0x00007f295d31a3f9 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f295e846b03 in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f2958e52980 (LWP 2969)):
#0  0x00007f295e83ba0f in poll () from /lib64/libc.so.6
#1  0x00007f295d4f6640 in QListData::detach_grow(int*, int)@plt () from /lib64/libKF5Crash.so.5
#2  0x000056253cda2e50 in ?? ()
#3  0x00007ffe1d9c8880 in ?? ()
#4  0x00007ffe1d9c8880 in ?? ()
#5  0x0000000100000003 in ?? ()
#6  0x752f6e75722f0001 in ?? ()
#7  0x303030312f726573 in ?? ()
#8  0x5f68736172636b2f in ?? ()
#9  0x00007f0039363932 in ?? ()
#10 0x000056253cda2e50 in ?? ()
#11 0x0000000000000011 in ?? ()
#12 0x00007ffe1d9c88e0 in ?? ()
#13 0x00007f295e78514e in unsetenv () from /lib64/libc.so.6
#14 0x00007ffe1d9c8950 in ?? ()
#15 0x00007ffe1d9c8950 in ?? ()
#16 0x69d67de186bca600 in ?? ()
#17 0x000056253ccf76d0 in ?? ()
#18 0x0000000000000013 in ?? ()
#19 0x0000000000000006 in ?? ()
#20 0x0000000000000010 in ?? ()
#21 0x00007ffe1d9c8950 in ?? ()
#22 0x00007ffe1d9c8948 in ?? ()
#23 0x000056253ccf76d0 in ?? ()
#24 0x00007f295d4f6f57 in KCrash::startProcess (argv=<optimized out>, waitAndExit=<optimized out>, argc=<optimized out>) at /usr/src/debug/kf5-kcrash-5.75.0-1.fc33.x86_64/src/kcrash.cpp:663
#25 0x00007f295d4f909a in ?? () from /lib64/libKF5Crash.so.5
#26 0x000056253cdfefe8 in ?? ()
#27 0x0000000000000000 in ?? ()