Ticket #5809: 5809-2.diff

wp-includes/taxonomy.php

@@ -2270 +2270 @@
                 else
                         return new WP_Error('duplicate_term_slug', sprintf(__('The slug “%s” is already in use by another term'), $slug));
         }
+        
+        if( $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->term_taxonomy WHERE term_id = %d AND taxonomy != %s", $id, $taxonomy ) ) ) {
+                $slug = wp_unique_term_slug( $slug, (object)$args );    
+                $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) );
+                $term_id = ( int ) $wpdb->insert_id;
+                $wpdb->update( $wpdb->term_taxonomy, compact( 'term_id' ), array( 'term_id' => $id, 'taxonomy' => $taxonomy ) );                
+        }
+        
         do_action( 'edit_terms', $term_id );
         $wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) );
         if ( empty($slug) ) {