| // 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. |
| |
| // compile-pass |
| // Regression test for #37655. The problem was a false edge created by |
| // coercion that wound up requiring that `'a` (in `split()`) outlive |
| // `'b`, which shouldn't be necessary. |
| |
| #![allow(warnings)] |
| |
| trait SliceExt<T> { |
| type Item; |
| |
| fn get_me<I>(&self, index: I) -> &I::Output |
| where I: SliceIndex<Self::Item>; |
| } |
| |
| impl<T> SliceExt<T> for [T] { |
| type Item = T; |
| |
| fn get_me<I>(&self, index: I) -> &I::Output |
| where I: SliceIndex<T> |
| { |
| panic!() |
| } |
| } |
| |
| pub trait SliceIndex<T> { |
| type Output: ?Sized; |
| } |
| |
| impl<T> SliceIndex<T> for usize { |
| type Output = T; |
| } |
| |
| fn foo<'a, 'b>(split: &'b [&'a [u8]]) -> &'a [u8] { |
| split.get_me(0) |
| } |
| |
| fn main() { } |