Thread: Arg struct in pThread function [pthread_create()]

I study pThread, and now I have problem with sending arg (struct data type) to new thread...


In terminal I have this output:
grytskiv@ZXDSL831II:~/thread/$ gcc -l pthread scaner.c -o scaner && ./scaner
In main: creating thread 0
In child: creating thread 0
�:10072052 ok
grytskiv@ZXDSL831II:~/thread/$


but if i call function scanner_port(void *thread_arg) whitout pthread_create(), my function work successful!
I can't find error...

Code:

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <pthread.h>

struct address
{
 char *ip;
 int port;
};


void *
scanner_port(void *thread_arg)
{
 struct address *address_pc;
 address_pc = (struct address *) thread_arg;

  printf("%s:%i\tok\n",address_pc->ip,address_pc->port);
  exit(0);
}


void *
scanner_ip(char *ip)
{
 int port_list[19];
 struct address address_pc;
 address_pc.ip = ip;

 port_list[0] = 80;
 port_list[1] = 8080;

 pthread_t threads[2];
 int rc;
 long t;
 for(t=0; t<1; t++)
 {
  address_pc.port = port_list[t];
  printf("In child: creating thread %ld\n", t);
  rc = pthread_create(&threads[t],NULL,(void*)scanner_port,(void *) &address_pc);
  if (rc)
  {
   printf("ERROR; return code from pthread_create() is %d\n", rc);
   exit(-1);
  }
  //scanner_port((void *) &address_pc);
 }

 pthread_exit(NULL);
}


int
main()
{
 char *ip;
 int ip_count = 1;

 ip="127.0.0.1";

 pthread_t threads[ip_count];
 int rc;
 long t;
 for(t=0; t<ip_count; t++)
 {
  printf("In main: creating thread %ld\n", t);
  rc = pthread_create(&threads[t],NULL,(void*)scanner_ip,ip);
  if (rc)
  {
   printf("ERROR; return code from pthread_create() is %d\n", rc);
   exit(-1);
  }
 }

 pthread_exit(NULL);

 return 0;
}