Application: systemsettings5 (5.21.80)
 (Compiled from sources)
Qt Version: 5.15.2
Frameworks Version: 5.80.0
Operating System: Linux 5.4.0-66-generic x86_64
Windowing System: X11
Drkonqi Version: 5.21.80
Distribution: KDE neon Unstable Edition

-- Information about the crash:
when I try to open bluetooth setting, the app keeps crashing. and then I log out and log in again, the problem still occurs

The crash can be reproduced every time.

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

[New LWP 37494]
[New LWP 37495]
[New LWP 37496]
[New LWP 37497]
[New LWP 37498]
[New LWP 37499]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fa2e28ddaff in __GI___poll (fds=0x7ffe40d7e3a8, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7fa2de6a28c0 (LWP 37492))]

Thread 7 (Thread 0x7fa2ca85a700 (LWP 37499)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ab91769f08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55ab91769eb8, cond=0x55ab91769ee0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55ab91769ee0, mutex=0x55ab91769eb8) at pthread_cond_wait.c:638
#3  0x00007fa2d53b4b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa2d53b475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fa2cb05b700 (LWP 37498)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ab91769f08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55ab91769eb8, cond=0x55ab91769ee0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55ab91769ee0, mutex=0x55ab91769eb8) at pthread_cond_wait.c:638
#3  0x00007fa2d53b4b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa2d53b475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fa2c705b700 (LWP 37497)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ab91769f08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55ab91769eb8, cond=0x55ab91769ee0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55ab91769ee0, mutex=0x55ab91769eb8) at pthread_cond_wait.c:638
#3  0x00007fa2d53b4b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa2d53b475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fa2d4c82700 (LWP 37496)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55ab91769f08) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55ab91769eb8, cond=0x55ab91769ee0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55ab91769ee0, mutex=0x55ab91769eb8) at pthread_cond_wait.c:638
#3  0x00007fa2d53b4b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fa2d53b475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fa2dcc59700 (LWP 37495)):
#0  0x00007fa2e28ddaff in __GI___poll (fds=0x7fa2d0012520, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2e0b6718e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fa2e0b672c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fa2e2ff7fbb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fa2e2f9c1ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2e2db6a12 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fa2e1cc7f4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fa2e2db7bac in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fa2ddd68700 (LWP 37494)):
#0  0x00007fa2e28ddaff in __GI___poll (fds=0x7fa2ddd67be8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fa2e14bec1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fa2e14c090a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fa2de299d58 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fa2e2db7bac in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fa2e1477609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fa2e28ea293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fa2de6a28c0 (LWP 37492)):
[KCrash Handler]
#4  0x00007fa2e3324268 in KConfigGroup::sync() () from /lib/x86_64-linux-gnu/libKF5ConfigCore.so.5
#5  0x00007fa2d4100cb8 in SidebarMode::~SidebarMode (this=0x55ab91866270, __in_chrg=<optimized out>) at ./sidebar/SidebarMode.cpp:318
#6  0x00007fa2d4100d5d in SidebarMode::~SidebarMode (this=0x55ab91866270, __in_chrg=<optimized out>) at ./sidebar/SidebarMode.cpp:316
#7  0x000055ab8f659032 in KPluginFactory::create<BaseMode> (args=..., parent=0x55ab912204b0, this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject.h:519
#8  SettingsBase::initApplication (this=0x55ab912204b0) at ./app/SettingsBase.cpp:142
#9  0x00007fa2e2fcb239 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fa2e3be0bad in QWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007fa2e3cf98c8 in QMainWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007fa2e4805c73 in KMainWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#13 0x00007fa2e485113b in KXmlGuiWindow::event(QEvent*) () from /lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#14 0x00007fa2e3b9ddc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fa2e3ba6bb8 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fa2e2f9d69a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fa2e2f9ffa1 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fa2e2ff8947 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fa2e0b66f9d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fa2e0b67220 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fa2e0b672c3 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fa2e2ff7fa2 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fa2e2f9c1ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fa2e2fa4354 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x000055ab8f654392 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:222
[Inferior 1 (process 37492) detached]

Possible duplicates by query: bug 434045, bug 225025, bug 187894, bug 182494, bug 181571.

Reported using DrKonqi