From 864bb47fe0e120dc323dc43df577888758227dfa Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Tue, 7 Jan 2014 13:32:39 +0100
Subject: [PATCH] Fixed error in username validation

http://www.woltlab.com/forum/index.php/Thread/219895-Fehlerhafter-Benutzername-bei-starten-einer-PN-Fatal-Error/
---
 wcfsetup/install/files/lib/data/user/UserProfile.class.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wcfsetup/install/files/lib/data/user/UserProfile.class.php b/wcfsetup/install/files/lib/data/user/UserProfile.class.php
index 8a003c7a9c..63780322b1 100644
--- a/wcfsetup/install/files/lib/data/user/UserProfile.class.php
+++ b/wcfsetup/install/files/lib/data/user/UserProfile.class.php
@@ -451,7 +451,9 @@ class UserProfile extends DatabaseObjectDecorator implements IBreadcrumbProvider
 		// revert usernames to original case
 		foreach ($users as $username => $user) {
 			unset($users[$username]);
-			$users[$caseSensitiveUsernames[$username]] = $user;
+			if (isset($caseSensitiveUsernames[$username])) {
+				$users[$caseSensitiveUsernames[$username]] = $user;
+			}
 		}
 		
 		return $users;
-- 
2.20.1