error instead of print, expanded message

src/runner/instance.rs

@@ -248,7 +248,7 @@ impl mlua::UserData for Instance{
 					Some(&rbx_types::Variant::CFrame(cf))=>return Into::<super::cframe::CFrame>::into(cf).into_lua(lua),
 					Some(&rbx_types::Variant::Vector3(v))=>return Into::<super::vector3::Vector3>::into(v).into_lua(lua),
 					None=>(),
-					other=>println!("instance.properties.get(i)={other:?}"),
+					other=>return Err(mlua::Error::runtime(format!("Instance.__index Unsupported property type instance={} index={index_str} value={other:?}",instance.name))),
 				}
 				//find a function with a matching name
 				if let Some(function)=class_functions_mut(lua,|cf|{