rust/src/test/ui/issue-45107-unnecessary-unsafe-in-closure.rs

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// 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.
#[deny(unused_unsafe)]
fn main() {
let mut v = Vec::<i32>::with_capacity(24);
unsafe {
let f = |v: &mut Vec<_>| {
unsafe {
v.set_len(24);
|w: &mut Vec<u32>| { unsafe {
w.set_len(32);
} };
}
|x: &mut Vec<u32>| { unsafe {
x.set_len(40);
} };
};
v.set_len(0);
f(&mut v);
}
|y: &mut Vec<u32>| { unsafe {
y.set_len(48);
} };
}