Application: systemsettings5 (5.9.1)

Qt Version: 5.7.1
Frameworks Version: 5.30.0
Operating System: Linux 4.4.0-62-generic x86_64
Distribution: KDE neon User Edition 5.9

-- Information about the crash:
- What I was doing when the application crashed:
Crash after setting GTK Theme and closing the system settings.

The crash can be reproduced sometimes.

-- 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 0x7f70669fe8c0 (LWP 19010))]

Thread 4 (Thread 0x7f703cbd4700 (LWP 19020)):
#0  0x00007f7063130b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f705e28638c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f705e28649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7063a5075b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f70639fb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f706382af64 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f7062187bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f706382fb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f70603416ba in start_thread (arg=0x7f703cbd4700) at pthread_create.c:333
#9  0x00007f706313c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f704cdfa700 (LWP 19013)):
#0  0x00007f705e2caa79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f705e285929 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f705e2862bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f705e28649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7063a5075b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f70639fb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f706382af64 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f7066b55735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f706382fb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f70603416ba in start_thread (arg=0x7f704cdfa700) at pthread_create.c:333
#10 0x00007f706313c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f70553ec700 (LWP 19012)):
#0  0x00007f7063130b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f7060bb7c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f7060bb98d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f7057944d79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f706382fb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f70603416ba in start_thread (arg=0x7f70553ec700) at pthread_create.c:333
#6  0x00007f706313c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f70669fe8c0 (LWP 19010)):
[KCrash Handler]
#6  0x00007f7062062025 in QV4::WeakValue::free() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f70620cecd9 in QV4::QObjectWrapper::destroyObject(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f7061f6874c in QV4::MemoryManager::sweep(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f7061f6a28c in QV4::MemoryManager::~MemoryManager() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f70620526f2 in QV4::ExecutionEngine::~ExecutionEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f7062189648 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f7062189769 in QV8Engine::~QV8Engine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f7061fe7686 in QJSEngine::~QJSEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f70620f8265 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f70620f8319 in QQmlEngine::~QQmlEngine() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f7063a2f814 in QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f7062455454 in QQuickWindow::~QQuickWindow() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f7062504e89 in QQuickView::~QQuickView() () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f7064f3c3d5 in QWindowContainer::~QWindowContainer() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f7064f3c3f9 in QWindowContainer::~QWindowContainer() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f7064f1abb9 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f7064f1abb9 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f7065066769 in QStackedWidget::~QStackedWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007f70650732f9 in QTabWidget::~QTabWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#34 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007f70407850de in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#37 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007f7065bb2afd in KCModule::~KCModule() () from /usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#40 0x00007f70407819a1 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/kcm_kwindecoration.so
#41 0x00007f70665902b4 in KCModuleProxy::deleteClient() () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#42 0x00007f706659035a in KCModuleProxy::~KCModuleProxy() () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#43 0x00007f70665904f9 in KCModuleProxy::~KCModuleProxy() () from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#44 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#46 0x00007f7064f1abb9 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007f7065091319 in QScrollArea::~QScrollArea() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#51 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#52 0x00007f70654c822e in ?? () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#53 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#55 0x00007f70654cc499 in KPageWidget::~KPageWidget() () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#56 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#58 0x00007f70667c8b49 in ModuleView::~ModuleView() () from /usr/lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#59 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#61 0x00007f7065066769 in QStackedWidget::~QStackedWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#62 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#64 0x00007f7065066769 in QStackedWidget::~QStackedWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#65 0x00007f7063a26663 in QObjectPrivate::deleteChildren() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007f7064f1a8e4 in QWidget::~QWidget() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#67 0x00007f70662dfac1 in KMainWindow::~KMainWindow() () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#68 0x000000000040ef3b in ?? ()
#69 0x000000000040ef99 in ?? ()
#70 0x00007f7063a28dd0 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#71 0x00007f7064f1f12b in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007f706501ce3b in QMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#73 0x00007f70662e1f57 in KMainWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#74 0x00007f7066327085 in KXmlGuiWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#75 0x00007f7064ed7ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#76 0x00007f7064edf8c6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#77 0x00007f70639fd0c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#78 0x00007f70639ff78b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#79 0x00007f7063a50333 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#80 0x00007f705e286197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#81 0x00007f705e2863f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#82 0x00007f705e28649c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#83 0x00007f7063a5073f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#84 0x00007f70639fb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#85 0x00007f7063a036cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#86 0x000000000040c2a0 in ?? ()
#87 0x00007f7063056830 in __libc_start_main (main=0x40beb0, argc=1, argv=0x7ffe3db43ec8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe3db43eb8) at ../csu/libc-start.c:291
#88 0x000000000040c319 in _start ()

Possible duplicates by query: bug 376171, bug 376166, bug 376152, bug 376135, bug 376133.

Reported using DrKonqi