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

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// edition:2018
#![feature(must_not_suspend)]
#![deny(must_not_suspend)]
#[must_not_suspend = "You gotta use Umm's, ya know?"]
struct Umm {
i: i64
}
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fn bar() -> Umm {
Umm {
i: 1
}
}
async fn other() {}
pub async fn uhoh() {
let _guard = bar(); //~ ERROR `Umm` held across
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other().await;
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drop(_guard);
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}
fn main() {
}