From b4383e944928ad0f452e6cf5a3f7583cf3f30b81 Mon Sep 17 00:00:00 2001
From: King_DuckZ <king_duckz@gmx.com>
Date: Fri, 22 Apr 2022 01:05:11 +0200
Subject: [PATCH] Set slot in case caller didn't, or else why we get the object
 parameter?

---
 include/wrenpp/vm_fun.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/wrenpp/vm_fun.hpp b/include/wrenpp/vm_fun.hpp
index f580a59..c897e81 100644
--- a/include/wrenpp/vm_fun.hpp
+++ b/include/wrenpp/vm_fun.hpp
@@ -142,6 +142,9 @@ namespace wren {
 			variable(vm, name, slot_num);
 		}
 
+		//Sets arguments so wren is ready to perform a function call. It doesn't
+		//touch at slot 0, so eventual objects for method calls must be set
+		//manually
 		template <typename... Args, int... Indices>
 		inline void set_for_call (std::integer_sequence<int, Indices...>, VM& vm, const Args&... args) {
 			vm.ensure_slots(sizeof...(Args));
@@ -248,6 +251,7 @@ namespace wren {
 	template <typename R, typename... Args>
 	inline R call (VM& vm, const Handle& object, const Handle& method, const Args&... args) {
 		detail::set_for_call<Args...>(std::make_integer_sequence<int, sizeof...(Args)>(), vm, args...);
+		vm.set_slot_handle(object, 0);
 		vm.call(method);
 		if constexpr (not std::is_same<void, R>::value) {
 			return get<R>(vm, 0);