From bc5bd51c4563cd76fd3d73eb3eeff7cf6e9905b1 Mon Sep 17 00:00:00 2001
From: Tatsuyuki Ishi <ishitatsuyuki@gmail.com>
Date: Sun, 11 Jun 2017 11:44:22 +0900
Subject: [PATCH] Make unused-extern-crate warn-by-default

---
 src/librustc/lint/builtin.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index cbe642a9a76a..811bf9776101 100644
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -30,7 +30,7 @@ declare_lint! {
 
 declare_lint! {
     pub UNUSED_EXTERN_CRATES,
-    Allow,
+    Warn,
     "extern crates that are never used"
 }