Deny internal lints on librustc_interface

3 files changed, 1 insertions, 2 deletions

diff --git a/src/librustc_interface/interface.rs b/src/librustc_interface/interface.rs
index 245a2bf92d5..74085123f89 100644
--- a/src/librustc_interface/interface.rs
+++ b/src/librustc_interface/interface.rs
@@ -12,7 +12,6 @@ use rustc_data_structures::OnDrop;
 use rustc_data_structures::sync::Lrc;
 use rustc_data_structures::fx::{FxHashSet, FxHashMap};
 use rustc_metadata::cstore::CStore;
-use std::collections::HashSet;
 use std::io::Write;
 use std::path::PathBuf;
 use std::result;
diff --git a/src/librustc_interface/lib.rs b/src/librustc_interface/lib.rs
index 3314681b698..353ff6a57a5 100644
--- a/src/librustc_interface/lib.rs
+++ b/src/librustc_interface/lib.rs
@@ -7,6 +7,7 @@
 #![cfg_attr(unix, feature(libc))]
 
 #![deny(rust_2018_idioms)]
+#![cfg_attr(not(stage0), deny(internal))]
 
 #![allow(unused_imports)]
 
diff --git a/src/librustc_interface/util.rs b/src/librustc_interface/util.rs
index 7f620de0f67..17523aedffb 100644
--- a/src/librustc_interface/util.rs
+++ b/src/librustc_interface/util.rs
@@ -21,7 +21,6 @@ use rustc_plugin;
 use rustc_privacy;
 use rustc_resolve;
 use rustc_typeck;
-use std::collections::HashSet;
 use std::env;
 use std::env::consts::{DLL_PREFIX, DLL_SUFFIX};
 use std::io::{self, Write};