// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. fn f(_: F) where F: Fn() -> R { } fn main() { f(|| -> ! { () }); //~^ ERROR: computation may converge in a function marked as diverging [E0270] }