Application: systemsettings5 (5.12.8)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-91-generic x86_64
Distribution: Ubuntu 18.04.4 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Close the "Get more theme" startup before installing a theme finishes; Close System Settings; Reopen System Settings; crash
- Custom settings of the application:
Blur-Glassy theme

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe917f9d800 (LWP 32577))]

Thread 7 (Thread 0x7fe8d2b63700 (LWP 32590)):
#0  0x00007fe9139e30b4 in __GI___libc_read (fd=28, buf=0x7fe8d2b62b90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fe90d88f2d0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe90d84a0b7 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe90d84a570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe90d84a6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe9143308ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe9142d590a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe9140f423a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe9140f917d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe90fb9b6db in start_thread (arg=0x7fe8d2b63700) at pthread_create.c:463
#10 0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe8d3d72700 (LWP 32587)):
#0  0x00007fe90d890649 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe90d849b33 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe90d84a4fb in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe90d84a6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe9143308ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe9142d590a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe9140f423a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe9140f917d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe90fb9b6db in start_thread (arg=0x7fe8d3d72700) at pthread_create.c:463
#9  0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe8d9575700 (LWP 32586)):
#0  0x00007fe9139e7bf9 in __GI___poll (fds=0x7fe8d4004e10, nfds=1, timeout=9450) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe90d84a5c9 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe90d84a6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe9143308ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe9142d590a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe9140f423a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe9140f917d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe90fb9b6db in start_thread (arg=0x7fe8d9575700) at pthread_create.c:463
#8  0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe8ef086700 (LWP 32580)):
#0  0x00007fe90fba19f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5599240313ec) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x559924031398, cond=0x5599240313c0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5599240313c0, mutex=0x559924031398) at pthread_cond_wait.c:655
#3  0x00007fe8efee1ecb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe8efee1ac7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe90fb9b6db in start_thread (arg=0x7fe8ef086700) at pthread_create.c:463
#6  0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe8fb712700 (LWP 32579)):
#0  0x00007fe90d890649 in g_mutex_lock () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fe90d849e1f in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe90d84a570 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe90d84a6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fe9143308ab in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe9142d590a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe9140f423a in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe915c3ad45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007fe9140f917d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fe90fb9b6db in start_thread (arg=0x7fe8fb712700) at pthread_create.c:463
#10 0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe904953700 (LWP 32578)):
#0  0x00007fe9139e7bf9 in __GI___poll (fds=0x7fe904952ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe90f72a747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fe90f72c36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fe9077005e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fe9140f917d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe90fb9b6db in start_thread (arg=0x7fe904953700) at pthread_create.c:463
#6  0x00007fe9139f488f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe917f9d800 (LWP 32577)):
[KCrash Handler]
#6  0x00007fe9153104fa in QWidget::testAttribute_helper(Qt::WidgetAttribute) const () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#7  0x00007fe91531062c in QWidgetPrivate::createTLSysExtra() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007fe9153185a0 in QWidget::setAttribute(Qt::WidgetAttribute, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007fe915319730 in QWidget::winId() const () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x0000559923a2cfca in ?? ()
#11 0x00007fe91430666f in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fe916117a57 in KDBusService::activateRequested(QStringList const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#13 0x00007fe9161122fc in KDBusService::Activate(QMap<QString, QVariant> const&) () from /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#14 0x00007fe916117825 in ?? () from /usr/lib/x86_64-linux-gnu/libKF5DBusAddons.so.5
#15 0x00007fe915c460f8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#16 0x00007fe915c4b0b0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#17 0x00007fe915c4b96c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#18 0x00007fe915c4e08e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#19 0x00007fe9143070c2 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fe9152e783c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fe9152ef104 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fe9142d78d8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007fe9142da04d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fe914331263 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fe90d84a417 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fe90d84a650 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fe90d84a6dc in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fe91433088f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fe9142d590a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fe9142de9b4 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x0000559923a2ce44 in ?? ()
#32 0x00007fe9138f4b97 in __libc_start_main (main=0x559923a2ca40, argc=1, argv=0x7ffd2ce62298, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd2ce62288) at ../csu/libc-start.c:310
#33 0x0000559923a2ceca in _start ()

Reported using DrKonqi