Version 5.0.0 beta 7

applications/core/modules/admin/support/support.php

@@ -65,6 +65,7 @@ use function intval;
 use function is_array;
 use function is_int;
 use function method_exists;
+use function strrpos;
 use function strtoupper;
 use function substr;
 use function trim;
@@ -1914,11 +1915,21 @@ class support extends Controller
 		{
 			foreach( $listeners as $class )
 			{
+				if( !class_exists( $class ) )
+				{
+					continue;
+				}
+
 				foreach( get_class_methods( $class ) as $method )
 				{
-					if( substr( $method, 0, 2 ) == 'on' and !in_array( $method, $events ) )
+					if( substr( $method, 0, 2 ) == 'on' )
 					{
-						$events[] = $method;
+						$parentClass = get_parent_class( $class );
+						$method = substr( $parentClass, strrpos( $parentClass, '\\' ) + 1 ) . ': ' . $method;
+						if( !in_array( $method, $events ) )
+						{
+							$events[] = $method;
+						}
 					}
 				}
 			}