rust/tests/ui/lint/must_not_suspend/issue-89562.rs

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// edition:2018
// run-pass
use std::sync::Mutex;
// Copied from the issue. Allow-by-default for now, so run-pass
pub async fn foo() {
let foo = Mutex::new(1);
let lock = foo.lock().unwrap();
// Prevent mutex lock being held across `.await` point.
drop(lock);
bar().await;
}
async fn bar() {}
fn main() {}