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|
error: future cannot be sent between threads safely
--> $DIR/send-not-implemented.rs:8:26
|
8 | async fn test(&self) {
| __________________________^
9 | | let mutex = Mutex::new(());
10 | | let _guard = mutex.lock().unwrap();
11 | | f().await;
12 | | }
| |_____^ future returned by `__test` is not `Send`
|
= help: within `impl std::future::Future`, the trait `std::marker::Send` is not implemented for `std::sync::MutexGuard<'_, ()>`
note: future is not `Send` as this value is used across an await
--> $DIR/send-not-implemented.rs:11:9
|
10 | let _guard = mutex.lock().unwrap();
| ------ has type `std::sync::MutexGuard<'_, ()>`
11 | f().await;
| ^^^^^^^^^ await occurs here, with `_guard` maybe used later
12 | }
| - `_guard` is later dropped here
= note: required for the cast to the object type `dyn std::future::Future<Output = ()> + std::marker::Send`
|
