1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/variance-contravariant-arg-object.rs b/src/test/ui/compile-fail-migration/variance-contravariant-arg-object.rs
new file mode 100644
index 00000000000..1795ac95358
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/variance-contravariant-arg-object.rs
@@ -0,0 +1,35 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![allow(dead_code)]
+
+// Test that even when `T` is only used in contravariant position, it
+// is treated as invariant.
+
+trait Get<T> : 'static {
+    fn get(&self, t: T);
+}
+
+fn get_min_from_max<'min, 'max>(v: Box<Get<&'max i32>>)
+                                -> Box<Get<&'min i32>>
+    where 'max : 'min
+{
+    v //~ ERROR mismatched types
+}
+
+fn get_max_from_min<'min, 'max, G>(v: Box<Get<&'min i32>>)
+                                   -> Box<Get<&'max i32>>
+    where 'max : 'min
+{
+    // Previously OK:
+    v //~ ERROR mismatched types
+}
+
+fn main() { }