1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/run-pass/traits/trait-alias-object.rs b/src/test/run-pass/traits/trait-alias-object.rs
new file mode 100644
index 00000000000..adac28eeb12
--- /dev/null
+++ b/src/test/run-pass/traits/trait-alias-object.rs
@@ -0,0 +1,26 @@
+// Copyright 2018 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.
+
+#![feature(trait_alias)]
+
+trait Foo = PartialEq<i32> + Send;
+trait Bar = Foo + Sync;
+
+trait I32Iterator = Iterator<Item = i32>;
+
+pub fn main() {
+    let a: &dyn Bar = &123;
+    assert!(*a == 123);
+    let b = Box::new(456) as Box<dyn Foo>;
+    assert!(*b == 456);
+
+    let c: &mut dyn I32Iterator = &mut vec![123].into_iter();
+    assert_eq!(c.next(), Some(123));
+}