Rust DoctorClippy · Correctness
Async block returning an unawaited future
clippy::async_yields_async
Await the inner future inside the block, so the caller receives its output rather than another future.
- Category
- Correctness
- Default level
- warn
- Tier
- P1
- Producer
- Clippy
- Diff scope
- line
Not a defect when
The block deliberately returns a future for the caller to await later, such as a factory that hands back a JoinHandle or a lazily started request.
What it reads
Clippy, with the compiler behind it. The only pass that compiles.
Tier
Serious: worth interrupting other work for.
The tier bounds how severe a rule may be; its category bounds the tier.Diff scope
The changed line itself.
What--scope contextual looks at to decide whether a change caused the finding.Change it
Turn it off, or make it blocking, without touching the code it flags:
rust-doctor --rule clippy::async_yields_async=off .
rust-doctor --rule clippy::async_yields_async=error .