From 171164f835c9d6265b59f3736da66429a1d707a8 Mon Sep 17 00:00:00 2001
From: Antoine Musso <hashar@users.mediawiki.org>
Date: Sat, 6 Jan 2007 18:46:08 +0000
Subject: [PATCH] Return nothing on empty math tags instead of char encoding

---
 RELEASE-NOTES     | 1 +
 includes/Math.php | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index e7c278d18e..cc305920ae 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -470,6 +470,7 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * Recentchanges RSS/Atom feeds now use a separate message for the description
   to avoid cluttering it with useless wiki formatting
 * (bug 8417) Handle EXIF unknown dates
+* (bug 8372) Return nothing on empty <math> tags.
 
 
 == Languages updated ==
diff --git a/includes/Math.php b/includes/Math.php
index 30b4bfe669..9fa631f7f1 100644
--- a/includes/Math.php
+++ b/includes/Math.php
@@ -39,6 +39,9 @@ class MathRenderer {
 			# No need to render or parse anything more!
 			return ('$ '.htmlspecialchars( $this->tex ).' $');
 		}
+		if( $this->tex == '' ) {
+			return; # bug 8372
+		}
 
 		if( !$this->_recall() ) {
 			# Ensure that the temp and output directories are available before continuing...
-- 
2.20.1