Application: systemsettings5 (5.10.0)

Qt Version: 5.9.0
Frameworks Version: 5.34.0
Operating System: Linux 4.1.39-8ca719a859bc-mptcp x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
-inside the change system settings
-inside "look and feel" I click to open the download manager  titles 'Get new looks'
-the manager seems stable itself but the bug occurs when I click download on any of the themes
-a small notification dialog window tries to load and it never succeeds and causes the whole settings app to crash

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f19c53557c0 (LWP 2152))]

Thread 11 (Thread 0x7f195b7fe700 (LWP 2287)):
#0  0x00007f19c0ff2102 in __libc_disable_asynccancel () at /usr/lib/libc.so.6
#1  0x00007f19c0fdb2c9 in poll () at /usr/lib/libc.so.6
#2  0x00007f19bae42bf9 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f197b5ef700 (LWP 2214)):
#0  0x00007f19bcfc56cc in pthread_cond_timedwait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f19c16dbf68 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f19c16d7374 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#4  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f197bfff700 (LWP 2213)):
#0  0x00007f19c0fdb2bd in poll () at /usr/lib/libc.so.6
#1  0x00007f19bae42bf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f1989bde700 (LWP 2160)):
#0  0x00007f19c0fd702d in read () at /usr/lib/libc.so.6
#1  0x00007f19bae866f0 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f19bae426db in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f19bae42ba0 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f198afdf700 (LWP 2159)):
#0  0x00007fffa5702c7c in clock_gettime ()
#1  0x00007f19c0ff27b6 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f19c190d001 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f19c190b839 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f19c190be15 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f19c190d43e in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f19bae42138 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#7  0x00007f19bae42b2b in  () at /usr/lib/libglib-2.0.so.0
#8  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#9  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#10 0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#11 0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#12 0x00007f19bf9a7645 in  () at /usr/lib/libQt5Qml.so.5
#13 0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#15 0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f199449f700 (LWP 2158)):
#0  0x00007f19c0fdb2bd in poll () at /usr/lib/libc.so.6
#1  0x00007f19bae42bf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f19bf9a7645 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f199857f700 (LWP 2156)):
#0  0x00007f19bcfc539d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f199dcfe71b in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f199dcfe447 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f19995cf700 (LWP 2155)):
#0  0x00007f19bcfc539d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f199dcfe71b in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#2  0x00007f199dcfe447 in  () at /usr/lib/xorg/modules/dri/r600_dri.so
#3  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f19a997f700 (LWP 2154)):
#0  0x00007f19c0fdb2bd in poll () at /usr/lib/libc.so.6
#1  0x00007f19bae42bf9 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f19c16d63ca in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f19c2245d45 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f19b22ef700 (LWP 2153)):
#0  0x00007f19c0fdb2bd in poll () at /usr/lib/libc.so.6
#1  0x00007f19bd8548e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f19bd856679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f19b4ec1d49 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f19c16dac7d in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f19bcfbf297 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f19c0fe525f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f19c53557c0 (LWP 2152)):
[KCrash Handler]
#6  0x00007f195305fb94 in  () at /usr/lib/libQtGui.so.4
#7  0x00007f19c523f19a in call_init.part () at /lib64/ld-linux-x86-64.so.2
#8  0x00007f19c523f2a6 in _dl_init () at /lib64/ld-linux-x86-64.so.2
#9  0x00007f19c524370e in dl_open_worker () at /lib64/ld-linux-x86-64.so.2
#10 0x00007f19c101ec94 in _dl_catch_error () at /usr/lib/libc.so.6
#11 0x00007f19c5242f29 in _dl_open () at /lib64/ld-linux-x86-64.so.2
#12 0x00007f19bb110f26 in  () at /usr/lib/libdl.so.2
#13 0x00007f19c101ec94 in _dl_catch_error () at /usr/lib/libc.so.6
#14 0x00007f19bb1115f5 in  () at /usr/lib/libdl.so.2
#15 0x00007f19bb110fb1 in dlopen () at /usr/lib/libdl.so.2
#16 0x00007f197ab92bc0 in  () at /usr/lib/libvlccore.so.8
#17 0x00007f197ab76f5b in  () at /usr/lib/libvlccore.so.8
#18 0x00007f197ab77288 in  () at /usr/lib/libvlccore.so.8
#19 0x00007f197ab771e4 in  () at /usr/lib/libvlccore.so.8
#20 0x00007f197ab77764 in  () at /usr/lib/libvlccore.so.8
#21 0x00007f197ab77d6d in  () at /usr/lib/libvlccore.so.8
#22 0x00007f197aafdf81 in libvlc_InternalInit () at /usr/lib/libvlccore.so.8
#23 0x00007f197a8c7cee in libvlc_new () at /usr/lib/libvlc.so.5
#24 0x00007f1988947051 in  () at /usr/lib/qt5/plugins/phonon4qt5_backend/phonon_vlc.so
#25 0x00007f198891a8f3 in  () at /usr/lib/qt5/plugins/phonon4qt5_backend/phonon_vlc.so
#26 0x00007f198894b7b8 in qt_plugin_instance () at /usr/lib/qt5/plugins/phonon4qt5_backend/phonon_vlc.so
#27 0x00007f19c1899286 in QPluginLoader::instance() () at /usr/lib/libQt5Core.so.5
#28 0x00007f19ab963380 in  () at /usr/lib/libphonon4qt5.so.4
#29 0x00007f19ab9657ec in  () at /usr/lib/libphonon4qt5.so.4
#30 0x00007f19ab96619e in  () at /usr/lib/libphonon4qt5.so.4
#31 0x00007f19ab96702c in Phonon::Factory::backend(bool) () at /usr/lib/libphonon4qt5.so.4
#32 0x00007f19ab967919 in  () at /usr/lib/libphonon4qt5.so.4
#33 0x00007f19ab9594d1 in  () at /usr/lib/libphonon4qt5.so.4
#34 0x00007f19b092fa20 in  () at /usr/lib/libKF5Notifications.so.5
#35 0x00007f19b0904870 in  () at /usr/lib/libKF5Notifications.so.5
#36 0x00007f19b0900120 in KNotification::sendEvent() () at /usr/lib/libKF5Notifications.so.5
#37 0x00007f19c18e4e32 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#38 0x00007f19c34b446c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#39 0x00007f19c34bbcf4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#40 0x00007f19c18b5b58 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#41 0x00007f19c18b7fed in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#42 0x00007f19c190da23 in  () at /usr/lib/libQt5Core.so.5
#43 0x00007f19bae42a47 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#44 0x00007f19bae42c78 in  () at /usr/lib/libglib-2.0.so.0
#45 0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#46 0x00007f19c190de3f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#47 0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#48 0x00007f19c36e0787 in QDialog::exec() () at /usr/lib/libQt5Widgets.so.5
#49 0x00007f19c3c7bdeb in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () at /usr/lib/libKF5WidgetsAddons.so.5
#50 0x00007f19c3c7c8dc in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) () at /usr/lib/libKF5WidgetsAddons.so.5
#51 0x00007f19c3c7cdc7 in  () at /usr/lib/libKF5WidgetsAddons.so.5
#52 0x00007f19c3c7d0ec in KMessageBox::questionYesNo(QWidget*, QString const&, QString const&, KGuiItem const&, KGuiItem const&, QString const&, QFlags<KMessageBox::Option>) () at /usr/lib/libKF5WidgetsAddons.so.5
#53 0x00007f19955905cb in  () at /usr/lib/libKF5NewStuff.so.5
#54 0x00007f19c18e453f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#55 0x00007f199474e2ff in KNSCore::QuestionManager::askQuestion(KNSCore::Question*) () at /usr/lib/libKF5NewStuffCore.so.5
#56 0x00007f199473691c in KNSCore::Question::ask() () at /usr/lib/libKF5NewStuffCore.so.5
#57 0x00007f19947249ce in KNSCore::Installation::slotPayloadResult(KJob*) () at /usr/lib/libKF5NewStuffCore.so.5
#58 0x00007f19c18e453f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#59 0x00007f19c1d5ff22 in KJob::result(KJob*, KJob::QPrivateSignal) () at /usr/lib/libKF5CoreAddons.so.5
#60 0x00007f19c1d61891 in KJob::finishJob(bool) () at /usr/lib/libKF5CoreAddons.so.5
#61 0x00007f19c18e453f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#62 0x00007f199473907c in  () at /usr/lib/libKF5NewStuffCore.so.5
#63 0x00007f19c18e453f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#64 0x00007f19be7d49f2 in QNetworkAccessManager::finished(QNetworkReply*) () at /usr/lib/libQt5Network.so.5
#65 0x00007f19be7d55c4 in  () at /usr/lib/libQt5Network.so.5
#66 0x00007f19be7d8c19 in  () at /usr/lib/libQt5Network.so.5
#67 0x00007f19c18e4425 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#68 0x00007f19be7f89a7 in  () at /usr/lib/libQt5Network.so.5
#69 0x00007f19be89fa69 in  () at /usr/lib/libQt5Network.so.5
#70 0x00007f19c18e4e32 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#71 0x00007f19c34b446c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#72 0x00007f19c34bbcf4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#73 0x00007f19c18b5b58 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#74 0x00007f19c18b7fed in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#75 0x00007f19c190da23 in  () at /usr/lib/libQt5Core.so.5
#76 0x00007f19bae42a47 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#77 0x00007f19bae42c78 in  () at /usr/lib/libglib-2.0.so.0
#78 0x00007f19bae42d0c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#79 0x00007f19c190de5b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#80 0x00007f19c18b41da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#81 0x00007f19c18bca34 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#82 0x000000000040b5ba in  ()
#83 0x00007f19c0f1843a in __libc_start_main () at /usr/lib/libc.so.6
#84 0x000000000040b63a in _start ()

Reported using DrKonqi