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// run-pass
// needs-unwind
// ignore-emscripten no subprocess support
#![feature(internal_output_capture)]
use std::fmt;
use std::fmt::{Display, Formatter};
use std::io::set_output_capture;
use std::sync::{Arc, Mutex};
pub struct A;
impl Display for A {
fn fmt(&self, _f: &mut Formatter<'_>) -> fmt::Result {
panic!();
}
}
fn main() {
set_output_capture(Some(Arc::new(Mutex::new(Vec::new()))));
assert!(std::panic::catch_unwind(|| {
eprintln!("{}", A);
})
.is_err());
}
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