#0  0x00007f0aa83b155e in gtk_flow_box_select_child (box=0x558052bca8d0, child=0x558051ee9790) at ../../../../gtk/gtkflowbox.c:4844
  [Error: gtkflowbox.c was not found in source tree]
#1  0x000055805129b9c5 in on_interface_settings_changed (self=0x5580527f7b40) at ../panels/ubuntu/cc-ubuntu-panel.c:215
  210:       else if (g_strcmp0 (gtk_theme, "Yaru-dark") == 0)
  211:         theme_item = self->theme_dark;
  212:     }
  213: 
  214:   if (theme_item != NULL)
  215:     gtk_flow_box_select_child (self->theme_box, theme_item);
  216:   else
  217:     gtk_flow_box_unselect_all (self->theme_box);
  218: }
  219: 
  220: static void
#2  0x00007f0aa8a0d90f in g_cclosure_marshal_VOID__STRINGv () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#3  0x00007f0aa8a0aa56 in _g_closure_invoke_va () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#4  0x00007f0aa8a29b28 in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#5  0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#6  0x00007f0aa8b50300 in g_settings_real_change_event (settings=0x558052444eb0, keys=0x7ffed5a51764, n_keys=<optimized out>) at ../../../gio/gsettings.c:392
  [Error: gsettings.c was not found in source tree]
#7  0x00007f0aa8ada4f5 in _g_cclosure_marshal_BOOLEAN__POINTER_INTv (closure=<optimized out>, return_value=0x7ffed5a515b0, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x558051eea140) at ../../../gio/gmarshal-internal.c:426
  [Error: gmarshal-internal.c was not found in source tree]
#8  0x00007f0aa8a0aa56 in _g_closure_invoke_va () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#9  0x00007f0aa8a28dd1 in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#10 0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#11 0x00007f0aa8b5195c in settings_backend_changed (target=<optimized out>, backend=<optimized out>, key=<optimized out>, origin_tag=<optimized out>) at ../../../gio/gsettings.c:452
  [Error: gsettings.c was not found in source tree]
#12 0x00007f0aa8b4b71f in g_settings_backend_invoke_closure (user_data=0x558052a298c0) at ../../../gio/gsettingsbackend.c:273
  [Error: gsettingsbackend.c was not found in source tree]
#13 0x00007f0aa8920015 in g_main_context_invoke_full () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6305.0
#14 0x00007f0aa8b4b868 in g_settings_backend_dispatch_signal (backend=0x7f0a8c005950, function_offset=0, name=0x5580527e30c0 "/org/gnome/desktop/interface/gtk-theme", origin_tag=0x0, names=0x0) at ../../../gio/gsettingsbackend.c:337
  [Error: gsettingsbackend.c was not found in source tree]
#15 0x00007f0a9c1a8141 in dconf_engine_emit_changes (engine=engine@entry=0x558051f04c90, changeset=changeset@entry=0x7f0a8c050690, origin_tag=origin_tag@entry=0x0) at ../engine/dconf-engine.c:1141
  [Error: dconf-engine.c was not found in source tree]
#16 0x00007f0a9c1a9787 in dconf_engine_change_fast (engine=0x558051f04c90, changeset=changeset@entry=0x7f0a8c050690, origin_tag=origin_tag@entry=0x0, error=error@entry=0x0) at ../engine/dconf-engine.c:1300
  [Error: dconf-engine.c was not found in source tree]
#17 0x00007f0a9c1a680f in dconf_settings_backend_write (backend=0x7f0a8c005950, key=0x5580528439a0 "/org/gnome/desktop/interface/gtk-theme", value=0x7f0a8c07f8a0, origin_tag=0x0) at ../gsettings/dconfsettingsbackend.c:76
  [Error: dconfsettingsbackend.c was not found in source tree]
#18 0x00007f0aa8b4c4a9 in g_settings_backend_write (backend=0x7f0a8c005950, key=key@entry=0x5580528439a0 "/org/gnome/desktop/interface/gtk-theme", value=value@entry=0x7f0a8c07f8a0, origin_tag=origin_tag@entry=0x0) at ../../../gio/gsettingsbackend.c:800
  [Error: gsettingsbackend.c was not found in source tree]
#19 0x00007f0aa8b50b83 in g_settings_write_to_backend (settings=settings@entry=0x558052444eb0, value=value@entry=0x7f0a8c07f8a0, key=<optimized out>) at ../../../gio/gsettings.c:1159
  [Error: gsettings.c was not found in source tree]
#20 0x00007f0aa8b52998 in g_settings_set_value (settings=0x558052444eb0, key=key@entry=0x558051323616 "gtk-theme", value=0x7f0a8c07f8a0) at ../../../gio/gsettings.c:1599
  [Error: gsettings.c was not found in source tree]
#21 0x00007f0aa8b52e5e in g_settings_set_string (settings=<optimized out>, key=key@entry=0x558051323616 "gtk-theme", value=<optimized out>) at ../../../gio/gsettings.c:1832
  [Error: gsettings.c was not found in source tree]
#22 0x000055805129bf7a in on_theme_box_selected_children_changed (self=0x5580527f7b40) at ../panels/ubuntu/cc-ubuntu-panel.c:189
  184:       else if (selected_item == self->theme_dark)
  185:         gtk_theme = "Yaru-dark";
  186:     }
  187: 
  188:   if (gtk_theme != NULL)
  189:     g_settings_set_string (self->interface_settings, GTK_THEME_KEY, gtk_theme);
  190: }
  191: 
  192: static void
  193: on_interface_settings_changed (CcUbuntuPanel *self)
  194: {
#23 0x00007f0aa8a0a802 in g_closure_invoke () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#24 0x00007f0aa8a1e814 in signal_emit_unlocked_R () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#25 0x00007f0aa8a29b9e in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#26 0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#27 0x00007f0aa83ac192 in gtk_flow_box_select_and_activate (box=0x558052bca8d0, child=0x5580522072b0) at ../../../../gtk/gtkflowbox.c:1159
  [Error: gtkflowbox.c was not found in source tree]
#28 0x00007f0aa83acc60 in gtk_flow_box_select_and_activate (child=<optimized out>, box=0x558052bca8d0) at ../../../../gtk/gtkflowbox.c:1157
  [Error: gtkflowbox.c was not found in source tree]
#29 gtk_flow_box_multipress_gesture_released (gesture=0x5580527ca4f0, n_press=<optimized out>, x=<optimized out>, y=<optimized out>, box=0x558052bca8d0) at ../../../../gtk/gtkflowbox.c:3064
  [Error: gtkflowbox.c was not found in source tree]
#30 0x00007f0aa85a6e41 in _gtk_marshal_VOID__INT_DOUBLE_DOUBLEv (closure=<optimized out>, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x5580525b6bb0) at gtkmarshalers.c:4803
  [Error: gtkmarshalers.c was not found in source tree]
#31 0x00007f0aa8a0aa56 in _g_closure_invoke_va () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#32 0x00007f0aa8a29b28 in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#33 0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#34 0x00007f0aa83bed0c in gtk_gesture_multi_press_end (gesture=0x5580527ca4f0, sequence=<optimized out>) at ../../../../gtk/gtkgesturemultipress.c:287
  [Error: gtkgesturemultipress.c was not found in source tree]
#35 0x00007f0aa8a0dc56 in g_cclosure_marshal_VOID__BOXEDv () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#36 0x00007f0aa8a0aa56 in _g_closure_invoke_va () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#37 0x00007f0aa8a29b28 in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#38 0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#39 0x00007f0aa83bbd92 in _gtk_gesture_set_recognized (sequence=0x0, recognized=0, gesture=0x5580527ca4f0) at ../../../../gtk/gtkgesture.c:346
  [Error: gtkgesture.c was not found in source tree]
#40 _gtk_gesture_check_recognized (gesture=gesture@entry=0x5580527ca4f0, sequence=sequence@entry=0x0) at ../../../../gtk/gtkgesture.c:387
  [Error: gtkgesture.c was not found in source tree]
#41 0x00007f0aa83bd39b in gtk_gesture_handle_event (event=0x7f0a8401aca0, controller=0x5580527ca4f0) at ../../../../gtk/gtkgesture.c:815
  [Error: gtkgesture.c was not found in source tree]
#42 gtk_gesture_handle_event (controller=0x5580527ca4f0, event=0x7f0a8401aca0) at ../../../../gtk/gtkgesture.c:713
  [Error: gtkgesture.c was not found in source tree]
#43 0x00007f0aa83c0376 in gtk_gesture_single_handle_event (controller=0x5580527ca4f0, event=0x7f0a8401aca0) at ../../../../gtk/gtkgesturesingle.c:222
  [Error: gtkgesturesingle.c was not found in source tree]
#44 0x00007f0aa8387a60 in gtk_event_controller_handle_event (controller=0x5580527ca4f0, event=event@entry=0x7f0a8401aca0) at ../../../../gtk/gtkeventcontroller.c:230
  [Error: gtkeventcontroller.c was not found in source tree]
#45 0x00007f0aa854950d in _gtk_widget_run_controllers (widget=0x558052bca8d0, event=0x7f0a8401aca0, phase=GTK_PHASE_BUBBLE) at ../../../../gtk/gtkwidget.c:7443
  [Error: gtkwidget.c was not found in source tree]
#46 0x00007f0aa85a094f in _gtk_marshal_BOOLEAN__BOXEDv (closure=0x558052023f50, return_value=0x7ffed5a52860, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x558052023f80) at gtkmarshalers.c:129
  [Error: gtkmarshalers.c was not found in source tree]
#47 0x00007f0aa8a0aa56 in _g_closure_invoke_va () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#48 0x00007f0aa8a28dd1 in g_signal_emit_valist () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#49 0x00007f0aa8a2a0d3 in g_signal_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6305.0
#50 0x00007f0aa854afa3 in gtk_widget_event_internal (event=0x7f0a8401aca0, widget=0x558052bca8d0) at ../../../../gtk/gtkwidget.c:7808
  [Error: gtkwidget.c was not found in source tree]
#51 gtk_widget_event_internal (widget=0x558052bca8d0, event=0x7f0a8401aca0) at ../../../../gtk/gtkwidget.c:7677
  [Error: gtkwidget.c was not found in source tree]
#52 0x00007f0aa84069f8 in propagate_event_up (topmost=<optimized out>, event=<optimized out>, widget=0x558052bca8d0) at ../../../../gtk/gtkmain.c:2594
  [Error: gtkmain.c was not found in source tree]
#53 propagate_event (widget=<optimized out>, event=0x7f0a8401aca0, captured=<optimized out>, topmost=0x0) at ../../../../gtk/gtkmain.c:2697
  [Error: gtkmain.c was not found in source tree]
#54 0x00007f0aa8408c4b in gtk_main_do_event (event=0x7f0a8401aca0) at ../../../../gtk/gtkmain.c:1917
  [Error: gtkmain.c was not found in source tree]
#55 gtk_main_do_event (event=<optimized out>) at ../../../../gtk/gtkmain.c:1687
  [Error: gtkmain.c was not found in source tree]
#56 0x00007f0aa80f2f19 in _gdk_event_emit () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgdk-3.so.0.2404.9
#57 0x00007f0aa8126016 in gdk_event_source_dispatch () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libgdk-3.so.0.2404.9
#58 0x00007f0aa891ef4d in g_main_context_dispatch () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6305.0
#59 0x00007f0aa891f1d0 in g_main_context_iterate.isra () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6305.0
#60 0x00007f0aa891f273 in g_main_context_iteration () from /tmp/apport_sandbox_0jy5vb1p/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6305.0
#61 0x00007f0aa8b38945 in g_application_run (application=0x558052574ab0, argc=<optimized out>, argv=<optimized out>) at ../../../gio/gapplication.c:2559
  [Error: gapplication.c was not found in source tree]
#62 0x00005580511e06b9 in main (argc=<optimized out>, argv=<optimized out>) at ../shell/main.c:70
  65: 
  66:   initialize_dependencies (&argc, &argv);
  67: 
  68:   application = cc_application_new ();
  69: 
  70:   return g_application_run (G_APPLICATION (application), argc, argv);
  71: }