rust/src/test/run-pass/issues/issue-41298.rs

// 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.

// run-pass
struct Function<T, F> { t: T, f: F }

impl<T, R> Function<T, fn() -> R> { fn foo() { } }
impl<T, R> Function<T, fn() -> R> { fn bar() { } }

fn main() { }