C:

• the initial code is missing several headers
• the typedef of an incomplete type is not done properly:

typedef struct {} Dinglemouse;

is not standard C (empty structures are forbidden). The correct way to refer to an incomplete type is by virtue of a forward declaration:

struct Dinglemouse;
typedef struct Dinglemouse Dinglemouse;

fork fixing both

How is this debugging? The code is completely incorrect and simply does something else.