From 91ea00eedcdce0d812f60de8b51ecbb9169801f3 Mon Sep 17 00:00:00 2001
From: Roan Kattouw <catrope@users.mediawiki.org>
Date: Wed, 26 Mar 2008 18:08:58 +0000
Subject: [PATCH] (bug 13517) list=users threw fatal error when only invalid
 usernames are specified

---
 includes/api/ApiQueryUsers.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/includes/api/ApiQueryUsers.php b/includes/api/ApiQueryUsers.php
index a24e189ed9..80da512765 100644
--- a/includes/api/ApiQueryUsers.php
+++ b/includes/api/ApiQueryUsers.php
@@ -63,11 +63,13 @@ if (!defined('MEDIAWIKI')) {
 		// Canonicalize user names
 		foreach($users as $u) {
 			$n = User::getCanonicalName($u);
-			if($n === false) 
+			if($n === false || $n === '') 
 				$retval[] = array('name' => $u, 'invalid' => '');
 			 else
 				$goodNames[] = $n;
 		}
+		if(empty($goodNames))
+			return $retval;
 
 		$db = $this->getDb();
 		$userTable = $db->tableName('user');
-- 
2.20.1