New upstream version 1.13.0+dfsg1

[rustc.git] / src / libcollectionstest / vec_deque.rs

diff --git a/src/libcollectionstest/vec_deque.rs b/src/libcollectionstest/vec_deque.rs
index a02666a50c2258e20bb1b8bc3f589fe91a4a3122..5e8633a9748246b38ad7fe66b4194ff86d912ac5 100644 (file)
--- a/src/libcollectionstest/vec_deque.rs
+++ b/src/libcollectionstest/vec_deque.rs
@@ -10,6 +10,7 @@
 
 use std::collections::VecDeque;
 use std::fmt::Debug;
+use std::collections::vec_deque::Drain;
 
 use test;
 
@@ -999,3 +1000,8 @@ fn test_contains() {
 
     assert!(!v.contains(&3));
 }
+
+#[allow(dead_code)]
+fn assert_covariance() {
+    fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &'new str> { d }
+}