2 files changed, 42 insertions, 0 deletions
diff --git a/src/test/compile-fail/issue-38404.rs b/src/test/compile-fail/issue-38404.rs
new file mode 100644
index 00000000000..a2b0d0a60c0
--- /dev/null
+++ b/src/test/compile-fail/issue-38404.rs
@@ -0,0 +1,16 @@
+// Copyright 2016 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.
+
+trait A<T>: std::ops::Add<Self> + Sized {}
+trait B<T>: A<T> {}
+trait C<T>: A<B<T, Output=usize>> {}
+//~^ ERROR the trait `B` cannot be made into an object
+
+fn main() {}
diff --git a/src/test/compile-fail/issue-38604.rs b/src/test/compile-fail/issue-38604.rs
new file mode 100644
index 00000000000..c1939a7707f
--- /dev/null
+++ b/src/test/compile-fail/issue-38604.rs
@@ -0,0 +1,26 @@
+// Copyright 2016 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.
+
+trait Q<T:?Sized> {}
+trait Foo where u32: Q<Self> {
+    fn foo(&self);
+}
+
+impl Q<()> for u32 {}
+impl Foo for () {
+    fn foo(&self) {
+        println!("foo!");
+    }
+}
+
+fn main() {
+    let _f: Box<Foo> = //~ ERROR `Foo` cannot be made into an object
+        Box::new(()); //~ ERROR `Foo` cannot be made into an object
+}