Console overhaul, part 2. New console is mostly working.

luprex/cpp/core/world-core.cpp

@@ -874,9 +874,8 @@ void World::invoke_lua_expr(int64_t actor_id, int64_t place_id, std::string_view
         LuaExtStack LS(L, func);
 
         // create the compiled closure.
-        int status = luaL_loadbuffer(L, datapack.data(), datapack.size(), "=invoke");
-        lua_replace(L, func.index());
-        if (status != LUA_OK) {
+        eng::string error = LS.load(func, datapack,  "=invoke");
+        if (!error.empty()) {
             // The closure is actually an error message. Do nothing.
             // This should normally not happen: LuaConsole should filter
             // out syntax errors.