From 7404ba829aed5b961a4fa2a243c27c72f532d94a Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Thu, 19 Jan 2006 04:52:18 +0000
Subject: [PATCH] check if Revision::getText() returned without an error

---
 includes/DifferenceEngine.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/includes/DifferenceEngine.php b/includes/DifferenceEngine.php
index 178e967474..588f215a59 100644
--- a/includes/DifferenceEngine.php
+++ b/includes/DifferenceEngine.php
@@ -325,6 +325,7 @@ CONTROL;
 			$difftext = $wgMemc->get( $key );
 			if ( $difftext ) {
 				wfIncrStats( 'diff_cache_hit' );
+				$difftext .= "\n<!-- diff cache key $key -->\n"; 
 				return $difftext;
 			}
 		}
@@ -479,9 +480,15 @@ CONTROL;
 		}
 		if ( $this->mOldRev ) {
 			$this->mOldtext = $this->mOldRev->getText();
+			if ( $this->mOldtext === false ) {
+				return false;
+			}
 		}
 		if ( $this->mNewRev ) {
 			$this->mNewtext = $this->mNewRev->getText();
+			if ( $this->mNewtext === false ) {
+				return false;
+			}
 		}
 		return true;
 	}
-- 
2.20.1