#0  0x00007f163b7190a9 in gtk_switch_class_init (klass=0x0) at ././gtk/gtkswitch.c:875
  [Error: gtkswitch.c was not found in source tree]
#1  gtk_switch_class_intern_init (klass=0x0) at ././gtk/gtkswitch.c:129
  [Error: gtkswitch.c was not found in source tree]
#2  0x00007f163bd3e040 in default_icon_theme_value () from /tmp/apport_sandbox_urPSiG/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#3  0x00000000010ea010 in ?? ()
#4  0x0000000000000000 in ?? ()