oops, forgot to return the result

src/twopass.rs

@@ -226,6 +226,11 @@ fn build_function(parent: &BuildContext<'_>, code: &ast::Function) -> Function {
 			}
 		}
 	}
+	let ret = Box::new(if let Some(ret) = &code.ret {
+		build_expression(&scope, &ret)
+	} else {
+		Expression::Constant(ast::Constant::Nil)
+	});
 	let scope = scope.scope.into_inner().finish();
 	Function {
 		name: code.name.clone(),
@@ -233,7 +238,7 @@ fn build_function(parent: &BuildContext<'_>, code: &ast::Function) -> Function {
 		locals: scope.locals,
 		upvalues: scope.upvalues,
 		body,
-		ret: Box::new(Expression::Constant(ast::Constant::Nil)),
+		ret,
 	}
 }