src/test/compile-fail/const-err.rs


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
30
31
32
33
34
35

// Copyright 2012 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.

#![feature(rustc_attrs)]
#![allow(exceeding_bitshifts)]

fn black_box<T>(_: T) {
    unimplemented!()
}

#[rustc_no_mir] // FIXME #29769 MIR overflow checking is TBD.
fn main() {
    let a = -std::i8::MIN;
    //~^ WARN attempted to negate with overflow
    let b = 200u8 + 200u8 + 200u8;
    //~^ WARN attempted to add with overflow
    //~^^ WARN attempted to add with overflow
    let c = 200u8 * 4;
    //~^ WARN attempted to multiply with overflow
    let d = 42u8 - (42u8 + 1);
    //~^ WARN attempted to subtract with overflow
    let _e = [5u8][1];
    //~^ ERROR const index-expr is out of bounds
    black_box(a);
    black_box(b);
    black_box(c);
    black_box(d);
}