extern struct tag *lookup_tag(const struct object_id *oid);
extern int parse_tag_buffer(struct tag *item, const void *data, unsigned long size);
extern int parse_tag(struct tag *item);
+extern void release_tag_memory(struct tag *t);
extern struct object *deref_tag(struct object *, const char *, int);
extern struct object *deref_tag_noverify(struct object *);
extern int gpg_verify_tag(const struct object_id *oid,