Review

Author: arnaud-lb

Zend/zend_ast.c

@@ -2409,6 +2409,8 @@ static ZEND_COLD void zend_ast_export_ex(smart_str *str, zend_ast *ast, int prio
 				APPEND_STR("?");
 			} else if (ast->attr == _IS_PLACEHOLDER_VARIADIC) {
 				APPEND_STR("...");
+			} else {
+				ZEND_UNREACHABLE();
 			}
 			break;