tokio-1.52.3
AppFlowy-IO/AppFlowytokio-1.52.3May 8, 2026by Darksonn
AI Summary
This release contains critical bug fixes for the Tokio runtime's synchronization primitives, specifically improving the reliability of message passing channels and read-write locks.
Key Highlights
- Fixed underflow in mpsc channel length calculation
- Fixed receiver notifications in mpsc OwnedPermit::release()
- Added validation to RwLock to ensure max_readers is not zero
- Fixed try_recv() to return Empty when channel closes with outstanding permits
Full Release Notes
# 1.52.3 (May 8th, 2026) ### Fixed * sync: fix underflow in mpsc channel `len()` ([#8062]) * sync: notify receivers in mpsc `OwnedPermit::release()` method ([#8075]) * sync: require that an `RwLock` has `max_readers != 0` ([#8076]) * sync: return `Empty` from `try_recv()` when mpsc is closed with outstanding permits ([#8074]) [#8062]: https://github.com/tokio-rs/tokio/pull/8062 [#8074]: https://github.com/tokio-rs/tokio/pull/8074 [#8075]: https://github.com/tokio-rs/tokio/pull/8075 [#8076]: https://github.com/tokio-rs/tokio/pull/8076