PHP warning on Users screen when post count = 0

[kpdesign]

I'm developing a wiki site that will consist of all pages (no posts).

When viewing the Users screen, there is a PHP warning at the top of the page:

Warning: Invalid argument supplied for foreach() in /home/xxx/public_html/xxx/wp-includes/user.php on line 180

If posts have a status other than "Published" or there are no posts at all, the warning displays. As soon as I publish one post, the warning goes away.

This happens in both single and multi-site 3.0 installs.

This is a result of the change to user.php in ​changeset 13576 in function count_many_users_posts().

function count_many_users_posts($users) {
	global $wpdb;
	
	if (0 == count($users))
		return array();
	    
	$userlist = implode(',', $users);
	$where = get_posts_by_author_sql('post');

	$result = $wpdb->get_results( "SELECT post_author, COUNT(*) FROM $wpdb->posts $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_N );

	$count = array();
	foreach($result as $row) {
		$count[$row[0]] = $row[1];
	}

	foreach($users as $id) {
		$id = (string) $id;
		if (!isset($count[$id]))
			$count[$id] = 0;
	}

	return $count;
}

[nacin]

(In [13617]) Fix warning in users.php. Fixes #12555

[miqrogroove]

Reverts [13617]. Improves style.

[miqrogroove]

Please revert [13617] and close as a duplicate of #10607.

I added some style improvements if you'd like to throw those in as well.

[miqrogroove]

Unified patch, if needed.

[miqrogroove]

12555.proper.diff is ready to go since other ticket is now closed.

[nacin]

(In [13680]) Fix notice on users admin panel. More or less reverts earlier fix, [13617]. props miqrogroove. fixes #12555