rust/src/test/run-pass/issues/issue-43923.rs

// Copyright 2017 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 A<T: ?Sized> { ptr: T }

fn foo<T>(x: &A<[T]>) {}

fn main() {
    let a = foo;
    let b = A { ptr: [a, a, a] };
    a(&A { ptr: [()] });
}