typedef struct node {
    int num;
    struct node *next;
} Node;

int delnode(Node **p_strtlst,int elmt)
{
    Node *tmp = *p_strtlst;
    Node *tmp_start = NULL;

    int flag = 0;    

    while(tmp != NULL) {
        if(tmp -> num == elmt) { //element found
            if(tmp_start == NULL) { //remove 1st element
                printf("rem 1st elmt (*p_strtlst) -> num = %d\n",(*p_strtlst) -> num);                
                *p_strtlst = (*p_strtlst) -> next; //--> apparently fails when RHS is NULL
                printf("*p_strtlst now points at %d, and *tmp points at %d\n",(*p_strtlst) -> num,tmp -> num);
                printf("flag = %d\n",flag);
            }
            else{
                printf("tmp -> num = %d\n",tmp -> num);
                tmp_start -> next = tmp -> next;
                printf("flag = %d\n",flag);
            }
            free(tmp);
            puts("after freeing list is:");
            printlist(*p_strtlst);
            flag = 1;
            break;
        }
        else { //element not found move on to the next
            tmp_start = tmp;
            tmp = tmp -> next;
        }
    }
    printf("\nflag = %d\n",flag);
    return flag;
}

        printf("rem 1st elmt (*p_strtlst) -> num = %d\n",(*p_strtlst) -> num);

        printf("(*p_strtlst)->next = %p\n", (void *)(*p_strtlst)->next);

        *p_strtlst = ((*p_strtlst) -> next); 

        printf("So far, so good, (*p_strtlst) = %p, tmp = %p\n", (void *)(*p_strtlst), (void *)tmp);
  
        /* The following crashes if the list only has one node */
        printf("*p_strtlst now points at %d, and *tmp points at %d\n",(*p_strtlst) -> num,tmp -> num);

        printf("rem 1st elmt (*p_strtlst) -> num = %d\n",(*p_strtlst) -> num);

        printf("(*p_strtlst)->next = %p\n", (void *)(*p_strtlst)->next);

        *p_strtlst = ((*p_strtlst) -> next); /*--> apparently fails when RHS is NULL */

        if (*p_strtlst) {
            printf("(*p_strtlst)->num = %d, and ", (*p_strtlst)->num);
        }

        printf("*tmp->num =  %d\n",tmp->num);