rust/tests/ui/logging-only-prints-once.rs
2024-02-16 20:02:50 +00:00

31 lines
569 B
Rust

//@ run-pass
//@ ignore-windows
//@ ignore-emscripten no threads support
use std::cell::Cell;
use std::fmt;
use std::thread;
struct Foo(Cell<isize>);
impl fmt::Debug for Foo {
fn fmt(&self, _fmt: &mut fmt::Formatter) -> fmt::Result {
let Foo(ref f) = *self;
assert_eq!(f.get(), 0);
f.set(1);
Ok(())
}
}
pub fn main() {
thread::spawn(move || {
let mut f = Foo(Cell::new(0));
println!("{:?}", f);
let Foo(ref mut f) = f;
assert_eq!(f.get(), 1);
})
.join()
.ok()
.unwrap();
}