From 48cd8c646ace585153d6ed25baccdd8420742e42 Mon Sep 17 00:00:00 2001
From: Steven Fackler <sfackler@gmail.com>
Date: Sat, 16 Nov 2013 14:35:35 -0800
Subject: More Mut tests

---
 src/libstd/mutable.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/libstd/mutable.rs')

diff --git a/src/libstd/mutable.rs b/src/libstd/mutable.rs
index 98177b3cdf5..44efbc149c1 100644
--- a/src/libstd/mutable.rs
+++ b/src/libstd/mutable.rs
@@ -295,4 +295,13 @@ mod test {
         let _b = x.borrow();
         x.with_mut(|x| *x += 1);
     }
+
+    #[test]
+    #[should_fail]
+    fn discard_doesnt_unborrow() {
+        let x = Mut::new(0);
+        let _b = x.borrow();
+        let _ = _b;
+        let _b = x.borrow_mut();
+    }
 }
-- 
cgit 1.4.1-3-g733a5