rust/tests/ui/lint/must_not_suspend/trait.rs

32 lines
608 B
Rust

// revisions: no_drop_tracking drop_tracking drop_tracking_mir
// [drop_tracking] compile-flags: -Zdrop-tracking
// [drop_tracking_mir] compile-flags: -Zdrop-tracking-mir
// edition:2018
#![feature(must_not_suspend)]
#![deny(must_not_suspend)]
#[must_not_suspend]
trait Wow {}
impl Wow for i32 {}
fn r#impl() -> impl Wow {
1
}
fn r#dyn() -> Box<dyn Wow> {
Box::new(1)
}
async fn other() {}
pub async fn uhoh() {
let _guard1 = r#impl(); //~ ERROR implementer of `Wow` held across
let _guard2 = r#dyn(); //~ ERROR boxed `Wow` trait object held across
other().await;
}
fn main() {
}