1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/traits/trait-alias-wf.rs b/src/test/ui/traits/trait-alias-wf.rs
new file mode 100644
index 00000000000..8c8ce1221ba
--- /dev/null
+++ b/src/test/ui/traits/trait-alias-wf.rs
@@ -0,0 +1,17 @@
+// 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 {}
+trait A<T: Foo> {}
+trait B<T> = A<T>; // T cannot be unbounded
+
+fn main() {}