ListG.toArray

[CromFr]

https://github.com/gtkd-developers/GtkD/blob/master/src/glib/ListG.d#L100
leading to Error: undefined identifier 'ListSG'

ListSG list = this; should be set to auto list = this; or ListG list = this;

[passenger94]

probably related :
https://github.com/gtkd-developers/GtkD/blob/master/src/glib/ListSG.d#L104
auto list = new ListG(null); should be auto list = new ListSG(null);