add Sync constraint for RwLock to prevent memory unsafety (#479)

laizy · Stjepan Glavina · commit fb19ebde1729 · 2019-11-08T08:56:55.000Z
diff --git 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.

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,7 @@ pub struct RwLock<T> {`
`57`	`57`	`}`
`58`	`58`
`59`	`59`	`unsafe impl<T: Send> Send for RwLock<T> {}`
`60`		`-unsafe impl<T: Send> Sync for RwLock<T> {}`
	`60`	`+unsafe impl<T: Send + Sync> Sync for RwLock<T> {}`
`61`	`61`
`62`	`62`	`impl<T> RwLock<T> {`
`63`	`63`	`/// Creates a new reader-writer lock.`