rust/src/test/compile-fail/str-mut-idx.rs

// 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 <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.

fn bot<T>() -> T { loop {} }

fn mutate(s: &mut str) {
    s[1..2] = bot();
    //~^ ERROR the size for value values of type
    //~| ERROR the size for value values of type
    s[1usize] = bot();
    //~^ ERROR the type `str` cannot be mutably indexed by `usize`
}

pub fn main() {}