blob: 07fac8e39c4a12045da034efe9ad835525b0b099 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
// Copyright 2012-2014 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.
// ignore-test
// error-pattern:index out of bounds
use std::usize;
fn main() {
let x = vec!(1_usize,2_usize,3_usize);
// This should cause a bounds-check panic, but may not if we do our
// bounds checking by comparing a scaled index value to the vector's
// length (in bytes), because the scaling of the index will cause it to
// wrap around to a small number.
let idx = usize::MAX & !(usize::MAX >> 1_usize);
println!("ov2 idx = 0x%x", idx);
// This should panic.
println!("ov2 0x%x", x[idx]);
}
|
