问HASH_FIND_STR上UTHash多级哈希表崩溃

EN

struct item2_map{
char stringkey[MAX_SIZE];
UT_hash_handle hh;
}

struct item1_map{
int key1;
struct item2_map *item2_map;
UT_hash_handle hh;
}

struct item1_map *retrieved;
struct item2_map *found_value, *tmp;

HASH_FIND(hh, hash_head, key1, &someintvalue, sizeof(int), retrieved)
if(retrieved==NULL)
{
    HASH_ADD(hh, hash_head, key1, sizeof(key1), my_item1);
    my_item1->item2_map = NULL;
    HASH_ADD_STR(my_item1->item2_map, stringkey, my_item2);
} else 
{
    //THIS WORKS
    HASH_ITER(hh, retrieved->item2_map, found_value, tmp)
    { //do something }

    //THIS SEG FAULTS
    HASH_FIND_STR(retrieved->item2_map, &my_item2->stringkey, found_value)
}