Adjust a rustc test to the safety changes

diff --git a/src/test/run-pass-fulldeps/newtype_index.rs b/src/test/run-pass-fulldeps/newtype_index.rs
index 3cd622a33b173afdbed2fb60bd59e4c7eb9aa46c..4c5a21201d674707b7ff8418662c330880cc78cb 100644 (file)
--- a/src/test/run-pass-fulldeps/newtype_index.rs
+++ b/src/test/run-pass-fulldeps/newtype_index.rs
@@ -1,7 +1,8 @@
-#![feature(rustc_attrs, rustc_private, step_trait)]
+#![feature(rustc_attrs, rustc_private, step_trait, min_const_unsafe_fn)]
 
 #[macro_use] extern crate rustc_data_structures;
 extern crate rustc_serialize;
+use rustc_serialize::{Decodable, Decoder};
 
 use rustc_data_structures::indexed_vec::Idx;