Possibly weird getaddrinfo() behavior

test_v4mapped.c

#include <netdb.h>
#include <stdio.h>
#include <string.h>

int main(void) {
    struct addrinfo hints, *ai;
    char buf[INET6_ADDRSTRLEN];  
    int ret;

    /*
    Excerpt from GNU getaddrinfo(3) manpage, as of 2009-09-03:
    
    If hint.ai_flags specifies the AI_V4MAPPED flag, and hints.ai_family
    was specified as AF_INET6, and no matching IPv6 addresses could be
    found, then return IPv4-mapped IPv6 addresses in the list pointed
    to by res.
    */
    memset(&hints, 0, sizeof(struct addrinfo));
    hints.ai_family = AF_INET6;
    hints.ai_flags = AI_V4MAPPED;

    /*
    Expected: getaddrinfo succeeded: ::ffff:74.125.232.51
    Result: getaddrinfo failed: No address associated with hostname
    */
    ret = getaddrinfo("google.com", NULL, &hints, &ai);
    if (ret != 0) {
        printf("getaddrinfo failed: %s\n", gai_strerror(ret));
    } else {
        inet_ntop(AF_INET6,
                  &(((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr),
                  &buf, sizeof(buf));
        printf("getaddrinfo succeeded: %s\n", buf);
        freeaddrinfo(ai);
    }
	
    return 0;
}