Make sure that there isn't an error if no event object exists. Fixes #8755.

src/event.js

@@ -63,7 +63,7 @@ jQuery.event = {
 			elemData.handle = eventHandle = function( e ) {
 				// Discard the second event of a jQuery.event.trigger() and
 				// when an event is called after a page has unloaded
-				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
+				return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ?
 					jQuery.event.handle.apply( eventHandle.elem, arguments ) :
 					undefined;
 			};