// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // compile-flags:-Znll -Zborrowck=mir -Zverbose #![allow(warnings)] trait Foo<'a> { } impl<'a, T> Foo<'a> for T { } fn foo<'a, T>(x: &T) -> impl Foo<'a> { x //~^ WARNING not reporting region error due to -Znll //~| ERROR explicit lifetime required in the type of `x` [E0621] } fn main() {}