src/test/ui/invalid_const_promotion.rs

// run-pass

#![allow(unused_mut)]
// ignore-wasm32
// ignore-emscripten
// ignore-sgx no processes

// compile-flags: -C debug_assertions=yes

#![stable(feature = "rustc", since = "1.0.0")]
#![feature(const_fn, rustc_private, staged_api, rustc_attrs)]
#![allow(const_err)]

extern crate libc;

use std::env;
use std::process::{Command, Stdio};

// this will panic in debug mode and overflow in release mode
//
// NB we give bar an unused argument because otherwise memoization
// of the const fn kicks in, causing a different code path in the
// compiler to be executed (see PR #66294).
#[stable(feature = "rustc", since = "1.0.0")]
#[rustc_promotable]
const fn bar(_: bool) -> usize { 0 - 1 }

fn foo() {
    let _: &'static _ = &bar(true);
}

#[cfg(unix)]
fn check_status(status: std::process::ExitStatus)
{
    use std::os::unix::process::ExitStatusExt;

    assert!(status.signal() == Some(libc::SIGILL)
            || status.signal() == Some(libc::SIGTRAP)
            || status.signal() == Some(libc::SIGABRT));
}

#[cfg(not(unix))]
fn check_status(status: std::process::ExitStatus)
{
    assert!(!status.success());
}

fn main() {
    let args: Vec<String> = env::args().collect();
    if args.len() > 1 && args[1] == "test" {
        foo();
        return;
    }

    let mut p = Command::new(&args[0])
        .stdout(Stdio::piped())
        .stdin(Stdio::piped())
        .arg("test").output().unwrap();
    check_status(p.status);
}