Add regression tests for #29859. However #29859 is not fully fixed.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/test/compile-fail/traits-inductive-overflow-supertrait-oibit.rs b/src/test/compile-fail/traits-inductive-overflow-supertrait-oibit.rs
new file mode 100644
index 00000000000..1362f8ac0ae
--- /dev/null
+++ b/src/test/compile-fail/traits-inductive-overflow-supertrait-oibit.rs
@@ -0,0 +1,28 @@
+// 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.
+
+// OIBIT-based version of #29859, supertrait version. Test that using
+// a simple OIBIT `..` impl alone still doesn't allow arbitary bounds
+// to be synthesized.
+
+#![feature(optin_builtin_traits)]
+
+trait Magic: Copy {}
+impl Magic for .. {}
+
+fn copy<T: Magic>(x: T) -> (T, T) { (x, x) }
+
+#[derive(Debug)]
+struct NoClone;
+
+fn main() {
+    let (a, b) = copy(NoClone); //~ ERROR E0277
+    println!("{:?} {:?}", a, b);
+}