/in/correct/dlist.c:217:37: error: expected expression
            fprintf(stdout, "%d\n", int(tmp->key));
                                    ^
/in/correct/dlist.c:220:36: error: expected expression
            fprintf(stdout, "%lf", double(tmp->key));
                                   ^
/in/correct/dlist.c:245:13: error: passing 'dlistValue' (aka 'union dlistValue_t') to parameter of incompatible type 'void *'
     insert(value, key, this);
            ^~~~~
/in/correct/dlist.c:42:19: note: passing argument to parameter 'op' here
void insert(void* op, char *name, list_t *list) {
                  ^
3 errors generated.