1 use std::fmt::{Display, Error, Formatter};
3 // This test case exercises std::sys_common::remutex::ReentrantMutex
4 // by calling println!() from inside fmt.
6 struct InterruptingCow;
8 impl Display for InterruptingCow {
9 fn fmt(&self, _f: &mut Formatter<'_>) -> Result<(), Error> {
16 println!("\"Knock knock\" \"Who's {} there?\"", InterruptingCow);