better debug info

diff --git a/includes/DifferenceEngine.php b/includes/DifferenceEngine.php
index e2e5180..52bf654 100644 (file)
--- a/includes/DifferenceEngine.php
+++ b/includes/DifferenceEngine.php
@@ -264,6 +264,7 @@ class DifferenceEngine {
                        $s = $dbr->getArray( 'cur', array( 'cur_text', 'cur_user_text', 'cur_comment' ),
                                array( 'cur_id' => $id ), $fname );
                        if ( $s === false ) {
+                               wfDebug( "Unable to load cur_id $id\n" );
                                return false;
                        }
 
@@ -276,6 +277,7 @@ class DifferenceEngine {
                                'old_flags','old_user_text','old_comment' ), array( 'old_id' => $this->mNewid ), $fname );
 
                        if ( $s === false ) {
+                               wfDebug( "Unable to load old_id {$this->mNewid}\n" );
                                return false;
                        }
 
@@ -297,15 +299,20 @@ class DifferenceEngine {
                                        'old_title' => $this->mNewPage->getDBkey()
                                ), $fname, array( 'ORDER BY' => 'inverse_timestamp', 'USE INDEX' => 'name_title_timestamp' )
                        );
+                       if ( $s === false ) {
+                               wfDebug( 'Unable to load ' . $this->mNewPage->getPrefixedDBkey . " from old\n" );
+                               return false;
+                       }
                } else {
                        $s = $dbr->getArray( 'old',
                                array( 'old_namespace','old_title','old_timestamp','old_text','old_flags','old_user_text','old_comment'),
                                array( 'old_id' => $this->mOldid ),
                                $fname
                        );
-               }
-               if ( $s === false ) {
-                       return false;
+                       if ( $s === false ) {
+                               wfDebug( "Unable to load old_id {$this->mOldid}\n" );
+                               return false;
+                       }
                }
                $this->mOldPage = Title::MakeTitle( $s->old_namespace, $s->old_title );
                $this->mOldtext = Article::getRevisionText( $s );