The base event handler does not handle any event by itself, because of that the event_methods classvar may be NULL.

src/event_handler.c

@@ -41,10 +41,7 @@ static
 void
 eventHandlerDtor(void * _this) {}
 
-TR_INSTANCE(TR_Hash, _event_methods);
 TR_INIT_IFACE(TR_Class, eventHandlerCtor, eventHandlerDtor, NULL);
-TR_CREATE_CLASS(TR_EventHandler, NULL, NULL, TR_IF(TR_Class)) = {
-	&(__event_methods.data)
-};
+TR_CREATE_CLASS(TR_EventHandler, NULL, NULL, TR_IF(TR_Class)) = { NULL };
 
 // vim: set ts=4 sw=4:

src/event_handler_class_cleanup.c

@@ -31,7 +31,9 @@ TR__eventHandlerClassCleanup(TR_class_ptr class)
 	while (class) {
 		struct c_TR_EventHandler_vars * vars;
 		vars = (struct c_TR_EventHandler_vars *)class->vars;
+		if (vars->event_methods) {
 			TR_hashCleanup(vars->event_methods);
+		}
 		class = class->parent;
 	}
 }