From 1ba1ef57b94a89af0527000666935c7c45462dec Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@users.mediawiki.org>
Date: Tue, 18 Mar 2008 21:45:18 +0000
Subject: [PATCH] Workaround for runJobs CategoryTree issue: * Don't bloat
 $this->mStripList on every setHook() call.

It adds up in batch processing until we end up with regex errors!
---
 includes/Parser.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/includes/Parser.php b/includes/Parser.php
index 00b8900e2f..8b2eb0f8a8 100644
--- a/includes/Parser.php
+++ b/includes/Parser.php
@@ -3843,7 +3843,9 @@ class Parser
 		$tag = strtolower( $tag );
 		$oldVal = isset( $this->mTagHooks[$tag] ) ? $this->mTagHooks[$tag] : null;
 		$this->mTagHooks[$tag] = $callback;
-		$this->mStripList[] = $tag;
+		if( !in_array( $tag, $this->mStripList ) ) {
+			$this->mStripList[] = $tag;
+		}
 
 		return $oldVal;
 	}
-- 
2.20.1