Add compile-fail test.

1 files changed, 26 insertions, 0 deletions

diff --git a/src/test/compile-fail/object-safety-associated-consts.rs b/src/test/compile-fail/object-safety-associated-consts.rs
new file mode 100644
index 00000000000..e38187fe86a
--- /dev/null
+++ b/src/test/compile-fail/object-safety-associated-consts.rs
@@ -0,0 +1,26 @@
+// Copyright 2014 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.
+
+// Check that we correctly prevent users from making trait objects
+// from traits with associated consts.
+
+trait Bar {
+    const X: usize;
+}
+
+fn make_bar<T:Bar>(t: &T) -> &Bar {
+        //~^ ERROR E0038
+        //~| NOTE the trait cannot contain associated consts like `X`
+        //~| NOTE the trait `Bar` cannot be made into an object
+    t
+}
+
+fn main() {
+}