WordPress 3.6 get_users function wonkiness

Interesting oddity when I upgraded to 3.6 this morning. A plugin I wrote uses the get_users() function to fetch users that are assigned to one of the roles in a given list. It had been working fine right up until the upgrade.

I finally tracked the problem down to the “fields” parameter of the get_users() function. For some reason, when I was using that parameter, an empty result set was returned. Take it out, and it works just fine.

Code snippet is below for reference. I’m not sure if this is a bug, or if something changed about the way one is supposed to use the get_users() function.

$meta_query = array('relation' => 'OR');
foreach($add_roles as $role) {
	$meta_query[] = array(
				'key' => $table_prefix.'capabilities',
				'value' => $role,
				'compare' => 'like'
			);
}

//get all eligible users
$args = array(
		'meta_query' => $meta_query,
		'orderby' => 'display_name',
		'order' => 'ASC',
		'fields' => array('ID, display_name'),
);

$users = get_users($args);