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-rw-r--r--src/libstd/sync/semaphore.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libstd/sync/semaphore.rs b/src/libstd/sync/semaphore.rs
index 907df69bfb0..891f8775ff2 100644
--- a/src/libstd/sync/semaphore.rs
+++ b/src/libstd/sync/semaphore.rs
@@ -10,7 +10,8 @@
 
 #![unstable(feature = "semaphore",
             reason = "the interaction between semaphores and the acquisition/release \
-                      of resources is currently unclear")]
+                      of resources is currently unclear",
+            issue = "27798")]
 
 use ops::Drop;
 use sync::{Mutex, Condvar};