Bug 446058

Application: systemsettings5 (5.23.3)

Qt Version: 5.15.3
Frameworks Version: 5.88.0
Operating System: Linux 5.11.0-40-generic x86_64
Windowing System: X11
Distribution: KDE neon User - Plasma 25th Anniversary Edition
DrKonqi: 5.23.3 [KCrashBackend]

-- Information about the crash:
- What I was doing when the application crashed:
  I was going to install new global theme but while installing it got crashed but theme installed successfully.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault

[New LWP 53462]
[New LWP 53463]
[New LWP 53464]
[New LWP 53465]
[New LWP 53466]
[New LWP 53467]
[New LWP 53472]
[New LWP 53473]
[New LWP 53532]
[New LWP 53751]
[New LWP 53752]
[New LWP 53753]
[New LWP 53759]
[New LWP 53760]
[New LWP 53761]
[New LWP 53762]
[New LWP 53764]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f3b401eaaff in __GI___poll (fds=0x7ffefc99ddb8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
__preamble__
____drkonqi_qmltrace_thread:1____
Failed to do pygdbmi parsing: No module named 'pygdbmi'
frame={level="0",func="onEntryEvent",file="/usr/share/kpackage/kcms/kcm_lookandfeel/contents/ui/main.qml",fullname="/usr/share/kpackage/kcms/kcm_lookandfeel/contents/ui/main.qml",line="124",lan".
---------------------------------
(beware that frames may have been optimized out)

[Current thread is 1 (Thread 0x7f3b3ba209c0 (LWP 53460))]

Thread 18 (Thread 0x7f3ac3fff700 (LWP 53764)):
#0  __GI___libc_read (nbytes=16, buf=0x7f3ac3ffe990, fd=67) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=67, buf=0x7f3ac3ffe990, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f3b3e322b2f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2d9ebe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e2da312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3ab8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3ac3ffeba0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#8  0x00007f3b405762c2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#9  0x00007f3b3f8ba3fa in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f3b4057745c in QThreadPrivate::start (arg=0x563897fca790) at thread/qthread_unix.cpp:329
#11 0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f3ad9640700 (LWP 53762)):
#0  0x00007f3b3e2d825d in g_source_ref () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3b3e2d8328 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2d982b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da29b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3ac8000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3ad963fbe0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f3b405762c2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f3b4057745c in QThreadPrivate::start (arg=0x563898477340) at thread/qthread_unix.cpp:329
#9  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f3ad9ffb700 (LWP 53761)):
#0  0x00007f3b3e2d68ed in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3b3e2d8345 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2d9cbf in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3ac4000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3ad9ffabe0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f3b405762c2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f3b4057745c in QThreadPrivate::start (arg=0x563898723160) at thread/qthread_unix.cpp:329
#9  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f3ada7fc700 (LWP 53760)):
#0  0x00007f3b401e61bb in __GI___libc_read (nbytes=16, buf=0x7f3ada7fb9d0, fd=41) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=41, buf=0x7f3ada7fb9d0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f3b3e322b2f in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2d9ebe in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e2da312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3ad0000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3ada7fbbe0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#8  0x00007f3b405762c2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#9  0x00007f3b4057745c in QThreadPrivate::start (arg=0x563898531850) at thread/qthread_unix.cpp:329
#10 0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f3adaffd700 (LWP 53759)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5638932d8eb0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5638932d8e60, cond=0x5638932d8e88) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5638932d8e88, mutex=0x5638932d8e60) at pthread_cond_wait.c:638
#3  0x00007f3b4057d5cb in QWaitConditionPrivate::wait (deadline=..., this=0x5638932d8e60) at thread/qwaitcondition_unix.cpp:146
#4  QWaitCondition::wait (this=<optimized out>, mutex=0x5638978cf860, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007f3b3f97fc24 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f3b3f980099 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f3b4057745c in QThreadPrivate::start (arg=0x5638978cf7c0) at thread/qthread_unix.cpp:329
#8  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f3b03fff700 (LWP 53753)):
#0  0x00007f3b3e2d68d2 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3b3e2d8345 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2d982b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da29b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3af828c1a0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3b03ffebc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007f3b405762c2 in QThread::exec (this=this@entry=0x563894cb3730) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007f3b3f605549 in QQmlThreadPrivate::run (this=0x563894cb3730) at qml/ftw/qqmlthread.cpp:155
#9  0x00007f3b4057745c in QThreadPrivate::start (arg=0x563894cb3730) at thread/qthread_unix.cpp:329
#10 0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f3b1ffff700 (LWP 53752)):
#0  0x00007f3b401eaaff in __GI___poll (fds=0x563897ae6740, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3b3e2da36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2da6f3 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3af59c6f8a in ?? () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f3b3e303ad1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f3b1f7fe700 (LWP 53751)):
#0  0x00007f3b401eaaff in __GI___poll (fds=0x563894c4e3f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3b3e2da36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da4f1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b3e303ad1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f3b012a6700 (LWP 53532)):
#0  0x00007f3b401eaaff in __GI___poll (fds=0x7f3af0004000, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3b01b151d6 in ?? () from /lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f3b01b06841 in pa_mainloop_poll () from /lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f3b01b06ec3 in pa_mainloop_iterate () from /lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f3b01b06f70 in pa_mainloop_run () from /lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f3b01b1511d in ?? () from /lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f3b01ab172c in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-13.99.so
#7  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f3b1d6c0700 (LWP 53473)):
#0  0x00007f3b3e327508 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3b3e2d98e1 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2da29b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3afc000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3b1d6bfbc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#6  0x00007f3b405762c2 in QThread::exec (this=this@entry=0x56389056c6d0) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f3b3f605549 in QQmlThreadPrivate::run (this=0x56389056c6d0) at qml/ftw/qqmlthread.cpp:155
#8  0x00007f3b4057745c in QThreadPrivate::start (arg=0x56389056c6d0) at thread/qthread_unix.cpp:329
#9  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f3b1e7fc700 (LWP 53472)):
#0  0x00007f3b401eaaff in __GI___poll (fds=0x7f3b08005240, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3b3e2da36e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3b08000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3b1e7fbbc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#5  0x00007f3b405762c2 in QThread::exec (this=this@entry=0x5638902acb70) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#6  0x00007f3b3f605549 in QQmlThreadPrivate::run (this=0x5638902acb70) at qml/ftw/qqmlthread.cpp:155
#7  0x00007f3b4057745c in QThreadPrivate::start (arg=0x5638902acb70) at thread/qthread_unix.cpp:329
#8  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f3b3217c700 (LWP 53467)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563890028ee8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x563890028e98, cond=0x563890028ec0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x563890028ec0, mutex=0x563890028e98) at pthread_cond_wait.c:638
#3  0x00007f3b3334ca4b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f3b3334c64b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f3b3297d700 (LWP 53466)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563890028ee8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x563890028e98, cond=0x563890028ec0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x563890028ec0, mutex=0x563890028e98) at pthread_cond_wait.c:638
#3  0x00007f3b3334ca4b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f3b3334c64b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f3b3317e700 (LWP 53465)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563890028eec) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x563890028e98, cond=0x563890028ec0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x563890028ec0, mutex=0x563890028e98) at pthread_cond_wait.c:638
#3  0x00007f3b3334ca4b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f3b3334c64b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f3b38945700 (LWP 53464)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x563890028ee8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x563890028e98, cond=0x563890028ec0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x563890028ec0, mutex=0x563890028e98) at pthread_cond_wait.c:638
#3  0x00007f3b3334ca4b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f3b3334c64b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f3b3a020700 (LWP 53463)):
#0  0x00007f3b3e3274dd in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f3b3e2d9c03 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3b3e2da312 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3b407b861b in QEventDispatcherGlib::processEvents (this=0x7f3b2c000b60, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7f3b3a01fbb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#6  0x00007f3b405762c2 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#7  0x00007f3b3f220f4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f3b4057745c in QThreadPrivate::start (arg=0x7f3b3f2a4d80) at thread/qthread_unix.cpp:329
#9  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f3b3aeb2700 (LWP 53462)):
#0  0x00007f3b401eaaff in __GI___poll (fds=0x7f3b3aeb1ae8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3b3ecdec1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3b3ece090a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3b3b600e88 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f3b4057745c in QThreadPrivate::start (arg=0x56388fd94870) at thread/qthread_unix.cpp:329
#5  0x00007f3b3ec99609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f3b401f7293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f3b3ba209c0 (LWP 53460)):
[KCrash Handler]
#4  0x00007f3b406759fd in QDir::fromNativeSeparators(QString const&) () at /usr/include/c++/9/bits/atomic_base.h:318
#5  0x00007f3b40689b97 in QFileInfoPrivate::QFileInfoPrivate (file=..., this=0x563898823e10) at /usr/include/c++/9/bits/atomic_base.h:279
#6  QFileInfo::QFileInfo (this=0x7ffefc99ea28, file=...) at io/qfileinfo.cpp:347
#7  0x00007f3b1c1ed134 in KCMLookandFeel::<lambda()>::operator() (__closure=<synthetic pointer>, __closure=<synthetic pointer>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:117
#8  KCMLookandFeel::knsEntryChanged (this=0x5638974baf00, wrapper=<optimized out>) at ./kcms/lookandfeel/kcm.cpp:126
#9  0x00007f3b1c1ea9a4 in KCMLookandFeel::qt_static_metacall (_o=_o@entry=0x5638974baf00, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=5, _a=_a@entry=0x7ffefc99ec10) at ./obj-x86_64-linux-gnu/kcms/lookandfeel/kcm_lookandfeel_static_autogen/EWIEGA46WW/moc_kcm.cpp:128
#10 0x00007f3b1c1eadd3 in KCMLookandFeel::qt_metacall (this=0x5638974baf00, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0x7ffefc99ec10) at ./obj-x86_64-linux-gnu/kcms/lookandfeel/kcm_lookandfeel_static_autogen/EWIEGA46WW/moc_kcm.cpp:214
#11 0x00007f3b3f598bf5 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffefc99ef50, type=type@entry=QMetaObject::InvokeMetaMethod, index=<optimized out>, index@entry=43, argv=<optimized out>) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/qml/ftw/qflagpointer_p.h:351
#12 0x00007f3b3f461765 in CallMethod (object=..., index=<optimized out>, returnType=returnType@entry=43, argCount=<optimized out>, argTypes=<optimized out>, engine=engine@entry=0x563898282d30, callArgs=<optimized out>, callType=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:1301
#13 0x00007f3b3f463867 in CallPrecise (object=..., data=..., engine=engine@entry=0x563898282d30, callArgs=callArgs@entry=0x7f3af64b45b8, callType=callType@entry=QMetaObject::InvokeMetaMethod) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/qml/qqmlpropertydata_p.h:285
#14 0x00007f3b3f46475a in QV4::QObjectMethod::callInternal (this=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=1) at jsruntime/qv4qobjectwrapper.cpp:2131
#15 0x00007f3b3f4841e1 in QV4::FunctionObject::call (argc=<optimized out>, argv=<optimized out>, thisObject=<optimized out>, this=<optimized out>) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/jsruntime/qv4functionobject_p.h:172
#16 QV4::Moth::VME::interpret (frame=0x7ffefc99f240, engine=0x563898282d30, code=0x7f3af64b4568 "\240\334\360\365:\177") at jsruntime/qv4vme_moth.cpp:754
#17 0x00007f3b3f48611f in QV4::Moth::VME::exec (frame=frame@entry=0x7ffefc99f240, engine=engine@entry=0x563898282d30) at jsruntime/qv4vme_moth.cpp:463
#18 0x00007f3b3f4132fd in QV4::Function::call (this=this@entry=0x5638984768d0, thisObject=<optimized out>, argv=argv@entry=0x7f3af64b4510, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:69
#19 0x00007f3b3f5b8fb7 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x5638977838e0, callData=callData@entry=0x7f3af64b44e0, isUndefined=isUndefined@entry=0x0) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/jsruntime/qv4value_p.h:343
#20 0x00007f3b3f55c8be in QQmlBoundSignalExpression::evaluate (this=<optimized out>, a=<optimized out>) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/jsruntime/qv4jscall_p.h:95
#21 0x00007f3b3f55d958 in QQmlBoundSignal_callback (e=0x563897783970, a=0x7ffefc9a0f50) at ../../include/QtQml/5.15.3/QtQml/private/../../../../../src/qml/qml/qqmlboundsignalexpressionpointer_p.h:69
#22 0x00007f3b3f59865d in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffefc9a0f50) at qml/qqmlnotifier.cpp:104
#23 0x00007f3b3f53afcf in QQmlData::signalEmitted (object=0x56389716a2d0, index=18, a=0x7ffefc9a0f50) at qml/qqmlengine.cpp:834
#24 0x00007f3b40794955 in doActivate<false> (sender=0x56389716a2d0, signal_index=18, argv=0x7ffefc9a0f50) at kernel/qobject_p.h:110
#25 0x00007f3b4078e197 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f3b1c049400 <Engine::staticMetaObject>, local_signal_index=local_signal_index@entry=15, argv=argv@entry=0x7ffefc9a0f50) at kernel/qobject.cpp:3946
#26 0x00007f3b1c022374 in Engine::entryEvent (this=<optimized out>, _t1=<optimized out>, _t1@entry=0x5638907fd030, _t2=<optimized out>, _t2@entry=Engine::StatusChangedEvent) at ./obj-x86_64-linux-gnu/src/qtquick/newstuffqmlplugin_autogen/EWIEGA46WW/moc_quickengine.cpp:600
#27 0x00007f3b1c02a094 in Engine::<lambda(const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent)>::operator() (__closure=0x5638907e0d70, event=KNSCore::EntryInternal::StatusChangedEvent, entry=...) at ./src/qtquick/quickengine.cpp:144
#28 QtPrivate::FunctorCall<QtPrivate::IndexesList<0, 1>, QtPrivate::List<const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent>, void, Engine::setConfigFile(const QString&)::<lambda(const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent)> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#29 QtPrivate::Functor<Engine::setConfigFile(const QString&)::<lambda(const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent)>, 2>::call<QtPrivate::List<KNSCore::EntryInternal const&, KNSCore::EntryInternal::EntryEvent>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#30 QtPrivate::QFunctorSlotObject<Engine::setConfigFile(const QString&)::<lambda(const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent)>, 2, QtPrivate::List<const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent>, void>::impl (which=1, r=<optimized out>, ret=<optimized out>, a=<optimized out>, this_=0x5638907e0d60) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:443
#31 QtPrivate::QFunctorSlotObject<Engine::setConfigFile(const QString&)::<lambda(const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent)>, 2, QtPrivate::List<const KNSCore::EntryInternal&, KNSCore::EntryInternal::EntryEvent>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x5638907e0d60, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:436
#32 0x00007f3b40794dce in QtPrivate::QSlotObjectBase::call (a=0x7ffefc9a10a0, r=0x56389716a2d0, this=0x5638907e0d60) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#33 doActivate<false> (sender=0x5638982211a0, signal_index=27, argv=0x7ffefc9a10a0) at kernel/qobject.cpp:3886
#34 0x00007f3b4078e197 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f3b1c1c8560 <KNSCore::Engine::staticMetaObject>, local_signal_index=local_signal_index@entry=24, argv=argv@entry=0x7ffefc9a10a0) at kernel/qobject.cpp:3946
#35 0x00007f3b1c144f3a in KNSCore::Engine::signalEntryEvent (this=<optimized out>, _t1=..., _t2=<optimized out>) at ./obj-x86_64-linux-gnu/src/core/KF5NewStuffCore_autogen/EWIEGA46WW/moc_engine.cpp:794
#36 0x00007f3b40794dce in QtPrivate::QSlotObjectBase::call (a=0x7ffefc9a11b0, r=0x5638982211a0, this=0x5638907531b0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#37 doActivate<false> (sender=0x5638933de6b0, signal_index=3, argv=0x7ffefc9a11b0) at kernel/qobject.cpp:3886
#38 0x00007f3b4078e197 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7f3b1c1c84a0 <KNSCore::Installation::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffefc9a11b0) at kernel/qobject.cpp:3946
#39 0x00007f3b1c1441d6 in KNSCore::Installation::signalEntryChanged (this=<optimized out>, _t1=...) at ./obj-x86_64-linux-gnu/src/core/KF5NewStuffCore_autogen/EWIEGA46WW/moc_installation.cpp:269
#40 0x00007f3b1c173062 in KNSCore::Installation::<lambda(KJob*)>::operator()(KJob *) const (__closure=0x563897c85f90, job=<optimized out>) at ./src/core/installation.cpp:479
#41 0x00007f3b40794dce in QtPrivate::QSlotObjectBase::call (a=0x7ffefc9a13a0, r=0x5638933de6b0, this=0x563897c85f80) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#42 doActivate<false> (sender=0x563898701f20, signal_index=6, argv=0x7ffefc9a13a0) at kernel/qobject.cpp:3886
#43 0x00007f3b4078e197 in QMetaObject::activate (sender=sender@entry=0x563898701f20, m=m@entry=0x7f3b40ac1720 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7ffefc9a13a0) at kernel/qobject.cpp:3946
#44 0x00007f3b40a6bdb0 in KJob::result (this=this@entry=0x563898701f20, _t1=<optimized out>, _t1@entry=0x563898701f20, _t2=...) at ./obj-x86_64-linux-gnu/src/lib/KF5CoreAddons_autogen/include/moc_kjob.cpp:633
#45 0x00007f3b40a6d22b in KJob::finishJob (this=0x563898701f20, emitResult=<optimized out>) at ./src/lib/jobs/kjob.cpp:98
#46 0x00007f3b4078b949 in QObject::event (this=0x563898701f20, e=0x7f3adc01d930) at kernel/qobject.cpp:1314
#47 0x00007f3b41373dc3 in QApplicationPrivate::notify_helper (this=this@entry=0x56388fd90aa0, receiver=receiver@entry=0x563898701f20, e=e@entry=0x7f3adc01d930) at kernel/qapplication.cpp:3632
#48 0x00007f3b4137cbb8 in QApplication::notify (this=0x7ffefc9a1a70, receiver=0x563898701f20, e=0x7f3adc01d930) at kernel/qapplication.cpp:3156
#49 0x00007f3b4075ddaa in QCoreApplication::notifyInternal2 (receiver=0x563898701f20, event=0x7f3adc01d930) at ../../include/QtCore/5.15.3/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:325
#50 0x00007f3b407606b1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x56388fd6b480) at kernel/qcoreapplication.cpp:1821
#51 0x00007f3b407b8fa7 in postEventSourceDispatch (s=0x56388fe48900) at kernel/qeventdispatcher_glib.cpp:277
#52 0x00007f3b3e2da17d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007f3b3e2da400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007f3b3e2da4a3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#55 0x00007f3b407b8602 in QEventDispatcherGlib::processEvents (this=0x56388fe4c120, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#56 0x00007f3b4075c8ab in QEventLoop::exec (this=this@entry=0x7ffefc9a1950, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#57 0x00007f3b40764a64 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#58 0x000056388e2b5332 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:208
[Inferior 1 (process 53460) detached]

Possible duplicates by query: bug 446018, bug 445704, bug 445386, bug 445066, bug 445025.

Reported using DrKonqi