Thread: using memcpy to fill a struct

I try to fill the parent structure with a memcpy. I work on embedded system (with Contiki OS). So I try to avoid using a malloc because I read that it is not recommended.

I test the code on my computer and I get the error Segmentation fault (core dumped).

On Contiki there are no errors but the values after the fill call are not the expected ones.

I have no idea why this error occurs and I don't know another way to do this.

Here is an example of the code that looks like what I'm trying to do:

Code:

typedef struct child{
    uint8_t age;
    uint16_t size;
}child_t;


typedef struct parent{
    child_t *child1;
    child_t *child2;
    bool has_child;
}parent_t;


void fill(parent_t *dest){
    parent_t parent;
    child_t child;
    
    uint8_t age=24;
    uint16_t size=180;
    
    child.age=age;
    child.size=size;
    
    printf("h2\n");
    memcpy(parent.child1, &child, sizeof(child_t));//Segmentation fault (core dumped)
    printf("h3\n");


    memcpy(dest, &parent, sizeof(parent_t);
}


int main(int argc, char *argv[]){


    parent_t parent;
    fill(&parent);
    return 0;
}