RsDoctorrust-doctor · Async
blocking-in-async
Flags blocking `std` calls inside `async fn`: `std::thread::sleep`, `std::fs::*`, `std::net::*`. These block the async runtime's thread pool, reducing concurrency and potentially causing deadlocks.
- Severity
- error
- Confidence
- medium
- Analyzer
- syn-ast
- Default policy
- Enabled
Tags
Framework requirements
No framework requirement.
Limitations
- The rule recognizes known call names but does not follow aliases or interprocedural calls.
Remediation
Use async equivalents: `tokio::time::sleep`, `tokio::fs::*`, `tokio::net::*`. For CPU-bound work, use `tokio::task::spawn_blocking`.
Fix capability: guidance