https://bugs.kde.org/show_bug.cgi?id=405405

--- Comment #3 from Patrick Silva <bugsefor...@gmx.com> ---
backtrace generated on neon dev unstable


Thread 7 (Thread 0x7fffafabf700 (LWP 3157)):
#0  0x00007ffff352fbf9 in __GI___poll (fds=0x7fffa8007030, nfds=3, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffcac8e481 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fffcac7fe40 in pa_mainloop_poll () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fffcac804d0 in pa_mainloop_iterate () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fffcac80560 in pa_mainloop_run () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fffcac8e3c9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fffca82b318 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fffee9586db in start_thread (arg=0x7fffafabf700) at
pthread_create.c:463
#8  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fffc0410700 (LWP 3055)):
#0  0x00007ffff352fbf9 in __GI___poll (fds=0x7fffb8003ce0, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffec59a539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffec59a64c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff3e7213f in QEventDispatcherGlib::processEvents
(this=0x7fffb8000b20, flags=...)
    at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff3e1364a in QEventLoop::exec (this=this@entry=0x7fffc040fd40,
flags=..., 
    flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007ffff3c3b41a in QThread::exec (this=this@entry=0x555556018fd0) at
thread/qthread.cpp:531
#6  0x00007ffff19f52e5 in QQmlThreadPrivate::run (this=0x555556018fd0) at
qml/ftw/qqmlthread.cpp:148
#7  0x00007ffff3c3cbc2 in QThreadPrivate::start (arg=0x555556018fd0) at
thread/qthread_unix.cpp:361
#8  0x00007fffee9586db in start_thread (arg=0x7fffc0410700) at
pthread_create.c:463
#9  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fffc9163700 (LWP 2972)):
#0  0x00007ffff352fbf9 in __GI___poll (fds=0x7fffc4004a00, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffec59a539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffec59a64c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff3e7213f in QEventDispatcherGlib::processEvents
(this=0x7fffc4000b20, flags=...)
    at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff3e1364a in QEventLoop::exec (this=this@entry=0x7fffc9162d40,
flags=..., 
    flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007ffff3c3b41a in QThread::exec (this=this@entry=0x555555bb4ad0) at
thread/qthread.cpp:531
#6  0x00007ffff19f52e5 in QQmlThreadPrivate::run (this=0x555555bb4ad0) at
qml/ftw/qqmlthread.cpp:148
#7  0x00007ffff3c3cbc2 in QThreadPrivate::start (arg=0x555555bb4ad0) at
thread/qthread_unix.cpp:361
#8  0x00007fffee9586db in start_thread (arg=0x7fffc9163700) at
pthread_create.c:463
#9  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fffd54e1700 (LWP 2920)):
#0  0x00007fffee95e9f3 in futex_wait_cancelable (private=<optimized out>,
expected=0, 
    futex_word=0x5555558cf438) at
../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5555558cf3e8,
cond=0x5555558cf410)
    at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5555558cf410, mutex=0x5555558cf3e8) at
pthread_cond_wait.c:655
#3  0x00007fffd6880dcb in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fffd6880af7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fffee9586db in start_thread (arg=0x7fffd54e1700) at
pthread_create.c:463
#6  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fffddf8e700 (LWP 2919)):
#0  0x00007ffff352fbf9 in __GI___poll (fds=0x7fffd8013ae0, nfds=4, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffec59a539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fffec59a64c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff3e7213f in QEventDispatcherGlib::processEvents
(this=0x7fffd8000b20, flags=...)
    at kernel/qeventdispatcher_glib.cpp:422
#4  0x00007ffff3e1364a in QEventLoop::exec (this=this@entry=0x7fffddf8dd30,
flags=..., 
    flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007ffff3c3b41a in QThread::exec (
    this=this@entry=0x7ffff4557d80 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at thread/qthread.cpp:531
#6  0x00007ffff42e0015 in QDBusConnectionManager::run (
    this=0x7ffff4557d80 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at qdbusconnection.cpp:178
#7  0x00007ffff3c3cbc2 in QThreadPrivate::start (
    arg=0x7ffff4557d80 <(anonymous
namespace)::Q_QGS__q_manager::innerFunction()::holder>)
    at thread/qthread_unix.cpp:361
#8  0x00007fffee9586db in start_thread (arg=0x7fffddf8e700) at
pthread_create.c:463
#9  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fffe5fa7700 (LWP 2918)):
#0  0x00007ffff352fbf9 in __GI___poll (fds=0x7fffe5fa6c78, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fffee51c747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fffee51e36a in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fffe6ef832a in QXcbEventQueue::run (this=0x5555557af9b0) at
qxcbeventqueue.cpp:225
#4  0x00007ffff3c3cbc2 in QThreadPrivate::start (arg=0x5555557af9b0) at
thread/qthread_unix.cpp:361
#5  0x00007fffee9586db in start_thread (arg=0x7fffe5fa7700) at
pthread_create.c:463
#6  0x00007ffff353c88f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ffff7fb1680 (LWP 2834)):
#0  0x0000000000000018 in ?? ()
#1  0x00007fffbd07e084 in DialogInstaller::~DialogInstaller
(this=0x555556179090, 
    __in_chrg=<optimized out>) at ./src/dialog_installer.cpp:77
#2  0x00007fffbd07e0d9 in DialogInstaller::~DialogInstaller
(this=0x555556179090, 
    __in_chrg=<optimized out>) at ./src/dialog_installer.cpp:81
#3  0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x55555a4b6df0)
    at kernel/qobject.cpp:1995
#4  0x00007ffff4ed619c in QWidget::~QWidget (this=0x55555bb42fe0,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#5  0x00007ffff6dc51d1 in KCModule::~KCModule() ()
   from /usr/lib/x86_64-linux-gnu/libKF5ConfigWidgets.so.5
#6  0x00007fffbd071c79 in GTKConfigKCModule::~GTKConfigKCModule
(this=0x55555bb42fe0, 
    __in_chrg=<optimized out>) at ./src/gtkconfigkcmodule.cpp:160
#7  0x00007ffff79914e4 in KCModuleProxy::deleteClient() ()
   from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#8  0x00007ffff799158f in KCModuleProxy::~KCModuleProxy() ()
   from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#9  0x00007ffff7991759 in KCModuleProxy::~KCModuleProxy() ()
   from /usr/lib/x86_64-linux-gnu/libKF5KCMUtils.so.5
#10 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x55555bb276e0)
    at kernel/qobject.cpp:1995
#11 0x00007ffff4ed619c in QWidget::~QWidget (this=0x55555bb157f0,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#12 0x00007ffff4ed63d9 in QWidget::~QWidget (this=0x55555bb157f0,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1726
#13 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x55555bad9a10)
    at kernel/qobject.cpp:1995
#14 0x00007ffff4ed619c in QWidget::~QWidget (this=0x7fffe0009db0,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#15 0x00007ffff5027199 in QScrollArea::~QScrollArea (this=0x7fffe0009db0,
__in_chrg=<optimized out>)
    at widgets/qscrollarea.cpp:172
#16 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555ab2530)
    at kernel/qobject.cpp:1995
#17 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555b870d0,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#18 0x00007ffff64eb73d in KPageStackedWidget::~KPageStackedWidget
(this=0x555555b870d0, 
    __in_chrg=<optimized out>)
    at
./obj-x86_64-linux-gnu/src/KF5WidgetsAddons_autogen/EWIEGA46WW/../../../../src/kpageview_p.h:37
#19 KPageStackedWidget::~KPageStackedWidget (this=0x555555b870d0,
__in_chrg=<optimized out>)
    at
./obj-x86_64-linux-gnu/src/KF5WidgetsAddons_autogen/EWIEGA46WW/../../../../src/kpageview_p.h:37
#20 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555b86bb0)
    at kernel/qobject.cpp:1995
#21 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555b86b20,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#22 0x00007ffff64d3fc9 in KPageWidget::~KPageWidget (this=0x555555b86b20,
__in_chrg=<optimized out>)
    at ./src/kpagewidget.cpp:80
#23 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555b86750)
    at kernel/qobject.cpp:1995
#24 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555b86710,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#25 0x00007ffff7bcbae9 in ModuleView::~ModuleView (this=0x555555b86710,
__in_chrg=<optimized out>)
    at ./core/ModuleView.cpp:118
#26 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555b86390)
    at kernel/qobject.cpp:1995
#27 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555b86350,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#28 0x00007fffc9807af1 in FocusHackWidget::~FocusHackWidget
(this=0x555555b86350, 
    __in_chrg=<optimized out>) at ./sidebar/SidebarMode.cpp:69
#29 FocusHackWidget::~FocusHackWidget (this=0x555555b86350,
__in_chrg=<optimized out>)
    at ./sidebar/SidebarMode.cpp:70
#30 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555845010)
    at kernel/qobject.cpp:1995
#31 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555834280,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#32 0x00007ffff503d189 in QStackedWidget::~QStackedWidget (this=0x555555834280, 
    __in_chrg=<optimized out>) at widgets/qstackedwidget.cpp:147
#33 0x00007ffff3e429fb in QObjectPrivate::deleteChildren
(this=this@entry=0x555555786e10)
    at kernel/qobject.cpp:1995
#34 0x00007ffff4ed619c in QWidget::~QWidget (this=0x555555828870,
__in_chrg=<optimized out>)
    at kernel/qwidget.cpp:1702
#35 0x00007ffff76dc68d in KMainWindow::~KMainWindow() ()
   from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#36 0x0000555555562cfb in SettingsBase::~SettingsBase (this=0x555555828870, 
    __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at
./app/SettingsBase.cpp:74
#37 0x0000555555562d59 in SettingsBase::~SettingsBase (this=0x555555828870, 
    __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at
./app/SettingsBase.cpp:77
#38 0x00007ffff3e459b0 in QObject::event (this=this@entry=0x555555828870,
e=e@entry=0x55555bd8b7b0)
    at kernel/qobject.cpp:1240
#39 0x00007ffff4edaf4b in QWidget::event (this=this@entry=0x555555828870, 
    event=event@entry=0x55555bd8b7b0) at kernel/qwidget.cpp:9334
#40 0x00007ffff4fe3030 in QMainWindow::event (this=0x555555828870,
event=0x55555bd8b7b0)
    at widgets/qmainwindow.cpp:1339
#41 0x00007ffff76deb61 in KMainWindow::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#42 0x00007ffff77249c5 in KXmlGuiWindow::event(QEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#43 0x00007ffff4e9a83c in QApplicationPrivate::notify_helper
(this=this@entry=0x555555795980, 
    receiver=receiver@entry=0x555555828870, e=e@entry=0x55555bd8b7b0) at
kernel/qapplication.cpp:3752
#44 0x00007ffff4ea1dd0 in QApplication::notify (this=0x7fffffffdcc0,
receiver=0x555555828870, 
    e=0x55555bd8b7b0) at kernel/qapplication.cpp:3499
#45 0x00007ffff3e15328 in QCoreApplication::notifyInternal2
(receiver=0x555555828870, 
    event=0x55555bd8b7b0) at kernel/qcoreapplication.cpp:1061
#46 0x00007ffff3e154fe in QCoreApplication::sendEvent (receiver=<optimized
out>, 
    event=event@entry=0x55555bd8b7b0) at kernel/qcoreapplication.cpp:1451
#47 0x00007ffff3e17e87 in QCoreApplicationPrivate::sendPostedEvents
(receiver=receiver@entry=0x0, 
    event_type=event_type@entry=0, data=0x55555578cff0) at
kernel/qcoreapplication.cpp:1800
#48 0x00007ffff3e18428 in QCoreApplication::sendPostedEvents
(receiver=receiver@entry=0x0, 
    event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1654
#49 0x00007ffff3e72b23 in postEventSourceDispatch (s=0x5555557e3320)
    at kernel/qeventdispatcher_glib.cpp:276
#50 0x00007fffec59a387 in g_main_context_dispatch () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007fffec59a5c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007fffec59a64c in g_main_context_iteration () from
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007ffff3e7213f in QEventDispatcherGlib::processEvents
(this=0x5555557f1c80, flags=...)
    at kernel/qeventdispatcher_glib.cpp:422
#54 0x00007ffff3e1364a in QEventLoop::exec (this=this@entry=0x7fffffffdbe0,
flags=..., 
    flags@entry=...) at kernel/qeventloop.cpp:225
#55 0x00007ffff3e1c800 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:1364
#56 0x000055555555fe78 in main (argc=<optimized out>, argv=<optimized out>) at
./app/main.cpp:71

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