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tokio-1.51.1

tokio-rs/tokiotokio-1.51.1Apr 8, 2026by Darksonn

AI Summary

A patch release that fixes critical bugs including semaphore reopening after forgetting, UDP socket error handling on Linux, and file descriptor leaks during `io_uring` operations.

Key Highlights

  • Fixed semaphore reopen after forget
  • Surface errors from `SO_ERROR` on UDP recv for Linux
  • Fixed `worker_local_schedule_count` test
  • Fixed file descriptor leak in `io_uring` cancel operation

Full Release Notes

# 1.51.1 (April 8th, 2026)

### Fixed

- sync: fix semaphore reopens after forget ([#8021])
- net: surface errors from `SO_ERROR` on `recv` for UDP sockets on Linux ([#8001])

### Fixed (unstable)

- metrics: fix `worker_local_schedule_count` test ([#8008])
- rt: do not leak fd when cancelling io\_uring open operation ([#7983])

[#7983]: https://github.com/tokio-rs/tokio/pull/7983
[#8001]: https://github.com/tokio-rs/tokio/pull/8001
[#8008]: https://github.com/tokio-rs/tokio/pull/8008
[#8021]: https://github.com/tokio-rs/tokio/pull/8021