GLib-GObject-WARNING **: invalid cast from `GtkSeparator' to `CcShellCategoryView'

Program received signal SIGSEGV, Segmentation fault.
0x000055555555f224 in cc_shell_category_view_get_item_view (self=0x5555559d7010) at cc-shell-category-view.c:261
261	cc-shell-category-view.c: No such file or directory.

Thread 3 (Thread 0x7fffd4ea7700 (LWP 3968)):
#0  0x00007ffff5682d93 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff5ef2136 in g_main_context_poll (n_fds=1, fds=0x7fffc80010e0, timeout=-1, context=0x555555bef2e0, priority=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3412
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x555555bef2e0, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3113
#3  g_main_context_iterate (context=0x555555bef2e0, block=<optimized out>, dispatch=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3055
#4  0x00007ffff5ef259a in g_main_loop_run (loop=0x7fffc80010c0) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3312
#5  0x00007fffefe3975b in dconf_context_thread (data=0x555555bef2e0) at dconfcontext.c:11
#6  0x00007ffff5f137d5 in g_thread_proxy (data=0x555555baf450) at /build/buildd/glib2.0-2.31.18/./glib/gthread.c:801
#7  0x00007ffff5960e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007ffff568e74d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fffd5af5700 (LWP 3966)):
#0  0x00007ffff5682d93 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007ffff5ef2136 in g_main_context_poll (n_fds=3, fds=0x7fffd00010e0, timeout=-1, context=0x5555559a4f30, priority=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3412
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x5555559a4f30, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3113
#3  g_main_context_iterate (context=0x5555559a4f30, block=<optimized out>, dispatch=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3055
#4  0x00007ffff5ef259a in g_main_loop_run (loop=0x5555559a4ee0) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3312
#5  0x00007ffff64be446 in gdbus_shared_thread_func (user_data=0x5555559a4f00) at /build/buildd/glib2.0-2.31.18/./gio/gdbusprivate.c:276
#6  0x00007ffff5f137d5 in g_thread_proxy (data=0x5555559a3ca0) at /build/buildd/glib2.0-2.31.18/./glib/gthread.c:801
#7  0x00007ffff5960e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8  0x00007ffff568e74d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7fd2940 (LWP 3962)):
#0  0x000055555555f224 in cc_shell_category_view_get_item_view (self=0x5555559d7010) at cc-shell-category-view.c:261
#1  0x000055555555c1e4 in get_item_views (shell=<optimized out>) at gnome-control-center.c:337
#2  keynav_failed (current_view=0x555555982010, direction=GTK_DIR_DOWN, shell=<optimized out>) at gnome-control-center.c:361
#3  0x00007ffff76a9ac2 in _gtk_marshal_BOOLEAN__ENUM (closure=0x555555888ff0, return_value=0x7fffffffcfc0, n_param_values=<optimized out>, 
    param_values=0x555555bba000, invocation_hint=<optimized out>, marshal_data=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmarshalers.c:165
#4  0x00007ffff61ad3c4 in g_closure_invoke (closure=0x555555888ff0, return_value=0x7fffffffcfc0, n_param_values=2, 
    param_values=0x555555bba000, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.18/./gobject/gclosure.c:774
#5  0x00007ffff61bd5f5 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x7fffffffd100, 
    instance_and_params=0x555555bba000) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3302
#6  0x00007ffff61c4ead in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, 
    var_args=0x7fffffffd168) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3043
#7  0x00007ffff61c5192 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3090
#8  0x00007ffff77e6bd1 in gtk_widget_keynav_failed (widget=0x555555982010, direction=GTK_DIR_DOWN)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwidget.c:9109
#9  0x00007ffff768360d in gtk_icon_view_move_cursor_up_down (count=<optimized out>, icon_view=0x555555982010)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkiconview.c:3661
#10 gtk_icon_view_real_move_cursor (icon_view=0x555555982010, step=<optimized out>, count=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkiconview.c:3457
#11 0x00007ffff76a9e2f in _gtk_marshal_BOOLEAN__ENUM_INT (closure=<optimized out>, return_value=0x7fffffffd580, 
    n_param_values=<optimized out>, param_values=0x555555c10240, invocation_hint=<optimized out>, marshal_data=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmarshalers.c:287
#12 0x00007ffff61ad3c4 in g_closure_invoke (closure=0x555555788470, return_value=0x7fffffffd580, n_param_values=3, 
    param_values=0x555555c10240, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.18/./gobject/gclosure.c:774
#13 0x00007ffff61bdbda in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x7fffffffd580, 
    instance_and_params=0x555555c10240) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3340
#14 0x00007ffff75c86ba in gtk_binding_entry_activate (entry=<optimized out>, object=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkbindings.c:652
#15 0x00007ffff75c8c58 in binding_activate (binding_set=<optimized out>, entries=<optimized out>, object=0x555555982010, is_release=0, 
    unbound=0x7fffffffd62c) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkbindings.c:1524
#16 0x00007ffff75c8dc2 in gtk_bindings_activate_list (object=0x555555982010, entries=0x555555a03320, is_release=0)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkbindings.c:1585
#17 0x00007ffff75ca1b0 in gtk_bindings_activate_event (object=0x555555982010, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkbindings.c:1670
#18 0x00007ffff76a9893 in _gtk_marshal_BOOLEAN__BOXED (closure=0x555555783690, return_value=0x7fffffffd850, n_param_values=<optimized out>, 
    param_values=0x7fffc80040d0, invocation_hint=<optimized out>, marshal_data=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmarshalers.c:85
#19 0x00007ffff61ad31a in g_closure_invoke (closure=0x555555783690, return_value=0x7fffffffd850, n_param_values=2, 
    param_values=0x7fffc80040d0, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.18/./gobject/gclosure.c:774
#20 0x00007ffff61bdbda in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x7fffffffd990, 
    instance_and_params=0x7fffc80040d0) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3340
#21 0x00007ffff61c4ead in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, 
    var_args=0x7fffffffd9f8) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3043
#22 0x00007ffff61c5192 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3090
#23 0x00007ffff77e5199 in gtk_widget_event_internal (widget=0x555555982010, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwidget.c:6154
#24 0x00007ffff78009b3 in gtk_window_propagate_key_event (window=<optimized out>, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwindow.c:6065
#25 0x00007ffff780392b in gtk_window_key_press_event (widget=0x5555557a9190, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwindow.c:6095
#26 0x00007ffff76a9893 in _gtk_marshal_BOOLEAN__BOXED (closure=0x555555783690, return_value=0x7fffffffdd00, n_param_values=<optimized out>, 
    param_values=0x555555bf0430, invocation_hint=<optimized out>, marshal_data=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmarshalers.c:85
#27 0x00007ffff61ad3c4 in g_closure_invoke (closure=0x555555783690, return_value=0x7fffffffdd00, n_param_values=2, 
    param_values=0x555555bf0430, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.18/./gobject/gclosure.c:774
#28 0x00007ffff61bdbda in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x7fffffffde40, 
    instance_and_params=0x555555bf0430) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3340
#29 0x00007ffff61c4ead in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, 
    var_args=0x7fffffffdea8) at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3043
#30 0x00007ffff61c5192 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./gobject/gsignal.c:3090
#31 0x00007ffff77e5199 in gtk_widget_event_internal (widget=0x5555557a9190, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkwidget.c:6154
#32 0x00007ffff76a9137 in gtk_propagate_event (widget=0x5555557a9190, event=0x555555bb6420)
    at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmain.c:2408
#33 0x00007ffff76a948b in gtk_main_do_event (event=0x555555bb6420) at /build/buildd/gtk+3.0-3.3.16/./gtk/gtkmain.c:1691
#34 0x00007ffff72db792 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>)
    at /build/buildd/gtk+3.0-3.3.16/./gdk/x11/gdkeventsource.c:360
#35 0x00007ffff5ef1dda in g_main_dispatch (context=0x5555557bb1a0) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:2510
#36 g_main_context_dispatch (context=0x5555557bb1a0) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3047
#37 0x00007ffff5ef21a0 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x5555557bb1a0, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3118
#38 g_main_context_iterate (context=0x5555557bb1a0, block=<optimized out>, dispatch=1, self=<optimized out>)
    at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3055
#39 0x00007ffff5ef2264 in g_main_context_iteration (context=0x5555557bb1a0, may_block=1) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3179
#40 0x00007ffff648a894 in g_application_run (application=0x5555558bb500, argc=<optimized out>, argv=0x7fffffffe2a8)
    at /build/buildd/glib2.0-2.31.18/./gio/gapplication.c:1496
#41 0x000055555555b7ba in main (argc=1, argv=0x7fffffffe2a8) at control-center.c:207