workaround example

patch_example.cs

// checkType https://github.com/pangweiwei/slua/blob/master/Assets/Slua/Script/LuaObject_overload.cs#L56-L68

static public bool checkType(IntPtr l, int p, out Vector3[] t)
{
	if(LuaDLL.luaL_checktype(l, p, LuaTypes.LUA_TTABLE, true) {
		int n = LuaDLL.lua_rawlen(l, p);
	  	t = new Vector3[n];
	  	for (int k = 0; k < n; k++)
	  	{
	  		LuaDLL.lua_rawgeti(l, p, k + 1);
	  		checkType(l, -1, out t[k]);
	  		LuaDLL.lua_pop(l, 1);
	  	}
  	} else {
  	  return checkType<Vector3[]>(l, p, out t);
  	}
}

// luaL_checktype https://github.com/pangweiwei/slua/blob/master/Assets/Slua/Script/LuaDLL.cs#L484-L491

public static bool luaL_checktype(IntPtr luaState, int p, LuaTypes t, bool ignoreError=false) {
	LuaTypes ct = LuaDLL.lua_type(luaState, p);
	if (ct != t) {
	  if (!ignoreError) throw new Exception(string.Format("arg {0} expect {1}, got {2}", p, lua_typenamestr(luaState, t), lua_typenamestr(luaState, ct)));
	  else return false;
	}
	return true;
}