rust/src/test/ui/run-pass/generator/panic-safe.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.

// ignore-wasm32-bare compiled with panic=abort by default

#![feature(generators, generator_trait)]

use std::ops::Generator;
use std::panic;

fn main() {
    let mut foo = || {
        if true {
            panic!();
        }
        yield;
    };

    let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
        unsafe { foo.resume() }
    }));
    assert!(res.is_err());

    for _ in 0..10 {
        let res = panic::catch_unwind(panic::AssertUnwindSafe(|| {
            unsafe { foo.resume() }
        }));
        assert!(res.is_err());
    }
}