From 8e5eb025a2b438eaaf609894ed910458078cc899 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20K=C3=A5re=20Alsaker?= <john.kare.alsaker@gmail.com>
Date: Wed, 14 Mar 2018 20:13:42 +0100
Subject: [PATCH] Add an Default impl for Lock

---
 src/librustc_data_structures/sync.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/librustc_data_structures/sync.rs b/src/librustc_data_structures/sync.rs
index f066ea98f91f..184ef1369761 100644
--- a/src/librustc_data_structures/sync.rs
+++ b/src/librustc_data_structures/sync.rs
@@ -333,6 +333,13 @@ impl<T> Lock<T> {
     }
 }
 
+impl<T: Default> Default for Lock<T> {
+    #[inline]
+    fn default() -> Self {
+        Lock::new(T::default())
+    }
+}
+
 // FIXME: Probably a bad idea
 impl<T: Clone> Clone for Lock<T> {
     #[inline]