From 1546e07e63b7d0cf35688dc0215b4fb898d539db Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 11 Feb 2019 15:29:25 +0100
Subject: [PATCH] add missing feature flag

---
 src/libcore/lib.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 419980225c33..af6161bafe0d 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -124,6 +124,7 @@
 #![feature(adx_target_feature)]
 #![feature(maybe_uninit)]
 #![feature(unrestricted_attribute_tokens)]
+#![feature(external_doc)]
 
 #[prelude_import]
 #[allow(unused)]