libcurl getaddrinfo list order issue

SUCCESS ON UBUNTU
=================
XXX@ubuntu:~/curl $ ./src/curl www.yahoo.com/nothing
Curl_resolv :: START
Curl_resolv :: BEFORE Curl_getaddrinfo
Curl_resolv :: AFTER Curl_getaddrinfo
curl_addrinfo.c :: Curl_getaddrinfo_ex :: START
curl_addrinfo.c :: curl_dogetaddrinfo : START
curl_addrinfo.c :: curl_dogetaddrinfo : RES: 0
 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 6
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 17
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 0
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 6
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 17
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 0
 GETADDRINFO ENTRY END

connect.c :: singleipconnect
 to 206.190.36.105
 ai->ai_protocol: 6
connect.c :: Curl_socket START
ai->ai_protocol: 6
BEFORE SOCKET
FAMILY: 2
SOCKTYPE: 1
PROTOCOL: 6
AFTER SOCKET
[SUCCESSFUL DOWNLOAD FROM HERE ON]



FAILURE ON MACOS
================
XXX@macos:~/curl $
Curl_resolv :: START
Curl_resolv :: BEFORE Curl_getaddrinfo
Curl_resolv :: AFTER Curl_getaddrinfo
curl_addrinfo.c :: Curl_getaddrinfo_ex :: START
curl_addrinfo.c :: curl_dogetaddrinfo : START
curl_addrinfo.c :: curl_dogetaddrinfo : RES: 0
 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 17
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 6
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 6
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 17
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 6
 GETADDRINFO ENTRY END

 GETADDRINFO ENTRY BEGIN
 ca->ai_protocol: 17
 GETADDRINFO ENTRY END

connect.c :: singleipconnect
 to 98.138.252.30
 ai->ai_protocol: 17
connect.c :: Curl_socket START
ai->ai_protocol: 17
BEFORE SOCKET
FAMILY: 2
SOCKTYPE: 1
PROTOCOL: 17
AFTER SOCKET
connect.c :: singleipconnect res: 7
connect.c :: singleipconnect : bailing out, Curl_socket failed
[FAILURE]