From 6a11e17b6bf64f1676a69d45edd336c8697a931b Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Fri, 18 Oct 2013 09:22:03 -0700
Subject: [PATCH] Fix an off-by-one in managed::refcount

This fixes a bug I accidentally introduced in #9922
---
 src/libstd/managed.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/libstd/managed.rs b/src/libstd/managed.rs
index a27c8aa4a76da..7322f0b0647a8 100644
--- a/src/libstd/managed.rs
+++ b/src/libstd/managed.rs
@@ -21,7 +21,7 @@ pub static RC_IMMORTAL : uint = 0x77777777;
 #[inline]
 pub fn refcount<T>(t: @T) -> uint {
     use unstable::raw::Repr;
-    unsafe { (*t.repr()).ref_count }
+    unsafe { (*t.repr()).ref_count - 1 }
 }
 
 /// Determine if two shared boxes point to the same object
@@ -110,3 +110,14 @@ fn test() {
     assert!((!ptr_eq::<int>(x, y)));
     assert!((!ptr_eq::<int>(y, x)));
 }
+
+#[test]
+fn refcount_test() {
+    use clone::Clone;
+
+    let x = @3;
+    assert_eq!(refcount(x), 1);
+    let y = x.clone();
+    assert_eq!(refcount(x), 2);
+    assert_eq!(refcount(y), 2);
+}