From 7cf5455e9b249e47961519bfb172118ddf960d71 Mon Sep 17 00:00:00 2001
From: laizy <aochyi@126.com>
Date: Fri, 8 Nov 2019 14:43:53 +0800
Subject: [PATCH] add `Sync` constraint for RwLock to prevent memory unsafety

---
 src/sync/rwlock.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sync/rwlock.rs b/src/sync/rwlock.rs
index 65b9dcad2..e042bbd2a 100644
--- a/src/sync/rwlock.rs
+++ b/src/sync/rwlock.rs
@@ -57,7 +57,7 @@ pub struct RwLock<T> {
 }
 
 unsafe impl<T: Send> Send for RwLock<T> {}
-unsafe impl<T: Send> Sync for RwLock<T> {}
+unsafe impl<T: Send + Sync> Sync for RwLock<T> {}
 
 impl<T> RwLock<T> {
     /// Creates a new reader-writer lock.