specified class size for type `CatType' is smaller than the parent type's `GObject

編寫了一個小小的Gobject程序，運行是出現錯誤：

(process:23258): GLib-GObject-WARNING **: specified class size for type `CatType' is smaller than the parent type's `GObject' class size
type = 0-----------------------------------g_type_register_static的返回爲0

(process:23258): GLib-GObject-CRITICAL **: g_object_new: assertion `G_TYPE_IS_OBJECT (object_type)' failed


查了好久，突然發現原來錯在：

struct _Cat
{
    GTypeInstance    parent;

    .......................

};


struct _CatClass
{
    GTypeClass        parent_class;

    ..........................

};


分別改成是：

struct _Cat
{
    GObject    parent;

    .......................

};


struct _CatClass
{
    GObjectClass        parent_class;

    ..........................

};


就好了