From c1407fb12dec28abac5ab45834edaf89b523480b Mon Sep 17 00:00:00 2001
From: =?utf8?q?Tim=20D=C3=BCsterhus?= <timwolla@arcor.de>
Date: Thu, 7 Jun 2012 16:34:01 +0200
Subject: [PATCH] Fixed Error-Handling of Regex.class.php

---
 wcfsetup/install/files/lib/system/Regex.class.php | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/wcfsetup/install/files/lib/system/Regex.class.php b/wcfsetup/install/files/lib/system/Regex.class.php
index 848a3245f9..4eae656de4 100644
--- a/wcfsetup/install/files/lib/system/Regex.class.php
+++ b/wcfsetup/install/files/lib/system/Regex.class.php
@@ -6,7 +6,7 @@ use \wcf\system\exception\SystemException;
  * Represents a regex.
  * 
  * @author	Tim Düsterhus
- * @copyright	2011 Tim Düsterhus
+ * @copyright	2011 - 2012 Tim Düsterhus
  * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  * @package	com.woltlab.wcf
  * @subpackage	system
@@ -181,7 +181,7 @@ final class Regex {
 	 * @param	mixed	$result
 	 */
 	private function checkResult($result, $method = '') {
-		if ($result === false) {
+		if ($result === false || $result === null) {
 			switch (preg_last_error()) {
 				case PREG_INTERNAL_ERROR:
 					$error = 'Internal error';
@@ -195,10 +195,12 @@ final class Regex {
 				case PREG_BAD_UTF8_ERROR:
 					$error = 'Bad UTF8';
 				break;
+				case PREG_NO_ERROR:
+					return $result;
 				default:
 					$error = 'Unknown error';
 			}
-
+			
 			throw new SystemException('Could not execute '.($method ? $method.' on ' : '').$this->regex.': '.$error);
 		}
 		return $result;
-- 
2.20.1