From 36ba96ea3cfef575ddc5eea7754a1b70b50e2080 Mon Sep 17 00:00:00 2001
From: nwin <nwin@users.noreply.github.com>
Date: Fri, 20 Feb 2015 13:09:29 +0100
Subject: Implement `Debug` for `RwLock`, `arc::Weak` and `Mutex`

---
 src/liballoc/arc.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/liballoc')

diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index 934e6ab2159..8cd27125646 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -139,6 +139,13 @@ pub struct Weak<T> {
 unsafe impl<T: Sync + Send> Send for Weak<T> { }
 unsafe impl<T: Sync + Send> Sync for Weak<T> { }
 
+#[stable(feature = "rust1", since = "1.0.0")]
+impl<T: fmt::Debug> fmt::Debug for Weak<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "(Weak)")
+    }
+}
+
 struct ArcInner<T> {
     strong: atomic::AtomicUsize,
     weak: atomic::AtomicUsize,
-- 
cgit 1.4.1-3-g733a5