src/test/compile-fail/issue-20825.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 pub trait Subscriber {
  12     type Input;
  13 }
  14
  15 pub trait Processor: Subscriber<Input = Self::Input> {
  16     //~^ ERROR unsupported cyclic reference between types/traits detected [E0391]
  17     type Input;
  18 }
  19
  20 fn main() {}