rust/src/test/compile-fail/rfc-1937-termination-trait/termination-trait-main-i32.rs

// 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.

fn main() -> i32 {
//~^ ERROR `i32: std::process::Termination` is not satisfied
//~| NOTE `main` can only return types that implement std::process::Termination, not `i32`
    0
}