tokio-1.47.5

Ripple-TS/rippletokio-1.47.5May 7, 2026by Darksonn

AI Summary

Tokio v1.47.5 provides a series of bug fixes targeting the `sync` module, specifically improving the robustness of MPSC channel operations and RwLock implementations to handle specific edge cases involving permit release and channel closure.

Key Highlights

Resolved `mpsc` channel length underflow issue.
Fixed receiver notification in `OwnedPermit::release()`.
Implemented check for `RwLock` `max_readers` non-zero constraint.
Updated `try_recv()` to return `Empty` when permits remain on a closed channel.

Full Release Notes

# 1.47.5 (May 7th, 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