Client does not skip over unreachable nodes

In some recent testing, I found that the client does not skip over the array to find a reachable node. For example when I'm running one on localhost, this fails:

<?php

$hosts = array(
'1.2.3.4',
'127.0.0.1'
);
$client = new Couchbase($hosts, "default", "", "default");

?>

Of course, when I leave out the first one it works. And it works too if I put the localhost before the invalid node.

Here is the libcouchbase error:

Warning: Failed to establish libcouchbase connection to server: Connection failure

Hopefully this should be easy to reproduce!