Index: wp-includes/post.php
===================================================================
--- wp-includes/post.php	(revision 21566)
+++ wp-includes/post.php	(working copy)
@@ -3521,7 +3521,9 @@
 			// Convert to WP_Post instances
 			$pages = array_map( 'get_post', $cache[ $key ] );
 
-			return apply_filters( 'get_pages', $pages, $r );
+			$pages = apply_filters( 'get_pages', $pages, $r );
+
+			return $pages;
 		}
 	}