Index: wp-includes/post-template.php
===================================================================
--- wp-includes/post-template.php	(revision 21759)
+++ wp-includes/post-template.php	(working copy)
@@ -261,6 +261,8 @@
 	if ( !empty( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, '2.3' );
 
+	$post = get_post();
+
 	if ( post_password_required() ) {
 		return __( 'There is no excerpt because this is a protected post.' );
 	}