New upstream version 1.28.0~beta.14+dfsg1

[rustc.git] / src / libstd / sync / rwlock.rs

diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index f7fdedc0d2179fc347d82a46297d712f5c3acc3a..e3db60cff8474767167eb02e5e6bb56c20f73ae2 100644 (file)
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -94,7 +94,7 @@ unsafe impl<T: ?Sized + Send + Sync> Sync for RwLock<T> {}
 /// [`read`]: struct.RwLock.html#method.read
 /// [`try_read`]: struct.RwLock.html#method.try_read
 /// [`RwLock`]: struct.RwLock.html
-#[must_use]
+#[must_use = "if unused the RwLock will immediately unlock"]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RwLockReadGuard<'a, T: ?Sized + 'a> {
     __lock: &'a RwLock<T>,
@@ -115,7 +115,7 @@ unsafe impl<'a, T: ?Sized + Sync> Sync for RwLockReadGuard<'a, T> {}
 /// [`write`]: struct.RwLock.html#method.write
 /// [`try_write`]: struct.RwLock.html#method.try_write
 /// [`RwLock`]: struct.RwLock.html
-#[must_use]
+#[must_use = "if unused the RwLock will immediately unlock"]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RwLockWriteGuard<'a, T: ?Sized + 'a> {
     __lock: &'a RwLock<T>,