From 69e2b7946c764901ce49cf892782c958b884a71c Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Wed, 12 Oct 2005 16:53:30 +0000
Subject: [PATCH] Fixed infinite loop in formatComment due to backreferences in
 preg_replace replacement string

---
 includes/Linker.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/includes/Linker.php b/includes/Linker.php
index 84e1bdaefd..8da9612d08 100644
--- a/includes/Linker.php
+++ b/includes/Linker.php
@@ -726,6 +726,8 @@ class Linker {
 					$match[1] = substr($match[1], 1);
 				$thelink = $this->makeLink( $match[1], $text, "", $trail );
 			}
+			# Quote backreferences, then run preg_replace
+			$thelink = strtr( $thelink, array( "\\" => "\\\\", '$' => "\\$" ) );
 			$comment = preg_replace( $linkRegexp, $thelink, $comment, 1 );
 		}
 		wfProfileOut( $fname );
-- 
2.20.1