From efa8fb006e6e7d0d70f1e65810b69993df44006c Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Fri, 8 Feb 2019 16:44:15 +0900
Subject: [PATCH] error_index_generator => 2018

---
 src/tools/error_index_generator/Cargo.toml | 1 +
 src/tools/error_index_generator/main.rs    | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/tools/error_index_generator/Cargo.toml b/src/tools/error_index_generator/Cargo.toml
index 7f8783c9d89be..116be234f3ceb 100644
--- a/src/tools/error_index_generator/Cargo.toml
+++ b/src/tools/error_index_generator/Cargo.toml
@@ -2,6 +2,7 @@
 authors = ["The Rust Project Developers"]
 name = "error_index_generator"
 version = "0.0.0"
+edition = "2018"
 
 [dependencies]
 rustdoc = { path = "../../librustdoc" }
diff --git a/src/tools/error_index_generator/main.rs b/src/tools/error_index_generator/main.rs
index 72cfd7d5e58e9..ef045495a0864 100644
--- a/src/tools/error_index_generator/main.rs
+++ b/src/tools/error_index_generator/main.rs
@@ -1,8 +1,9 @@
 #![feature(rustc_private)]
 
+#![deny(rust_2018_idioms)]
+
 extern crate env_logger;
 extern crate syntax;
-extern crate rustdoc;
 extern crate serialize as rustc_serialize;
 
 use std::collections::BTreeMap;