chore(deps): update rust crate tokio to v1.52.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
tokio (source)	dependencies	minor	1.47.1 → 1.52.3

---

Release Notes

tokio-rs/tokio (tokio)

v1.52.3: Tokio v1.52.3

Compare Source

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)

v1.52.2: Tokio v1.52.2

Compare Source

1.52.2 (May 4th, 2026)

This release reverts the LIFO slot stealing change introduced in 1.51.0 (#​7431), due to its performance impact. (#​8100)

v1.52.1: Tokio v1.52.1

Compare Source

1.52.1 (April 16th, 2026)

Fixed

• runtime: revert #​7757 to fix a regression that causes spawn_blocking to hang (#​8057)

v1.52.0: Tokio v1.52.0

Compare Source

1.52.0 (April 14th, 2026)

Added

• io: AioSource::register_borrowed for I/O safety support (#​7992)
• net: add try_io function to unix::pipe sender and receiver types (#​8030)

Added (unstable)

• runtime: Builder::enable_eager_driver_handoff setting enable eager hand off of the I/O and time drivers before polling tasks (#​8010)
• taskdump: add trace_with() for customized task dumps (#​8025)
• taskdump: allow impl FnMut() in trace_with instead of just fn() (#​8040)
• fs: support io_uring in AsyncRead for File (#​7907)

Changed

• runtime: improve spawn_blocking scalability with sharded queue (#​7757)
• runtime: use compare_exchange_weak() in worker queue (#​8028)

Fixed

• runtime: overflow second half of tasks when local queue is filled instead of first half (#​8029)

Documented

• docs: fix typo in oneshot::Sender::send docs (#​8026)
• docs: hide #[tokio::main] attribute in the docs of sync::watch (#​8035)
• net: add docs on ConnectionRefused errors with UDP sockets (#​7870)

v1.51.3: Tokio v1.51.3

Compare Source

1.51.3 (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)

v1.51.2: Tokio v1.51.1

Compare Source

1.51.2 (May 4th, 2026)

This release reverts the LIFO slot stealing change introduced in 1.51.0 (#​7431), due to its performance impact. (#​8100)

v1.51.1: Tokio v1.51.1

Compare Source

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)

v1.51.0: Tokio v1.51.0

Compare Source

1.51.0 (April 3rd, 2026)

Added

• net: implement get_peer_cred on Hurd (#​7989)
• runtime: add tokio::runtime::worker_index() (#​7921)
• runtime: add runtime name (#​7924)
• runtime: stabilize LocalRuntime (#​7557)
• wasm: add wasm32-wasip2 networking support (#​7933)

Changed

• runtime: steal tasks from the LIFO slot (#​7431)

Fixed

• docs: do not show "Available on non-loom only." doc label (#​7977)
• macros: improve overall macro hygiene (#​7997)
• sync: fix notify_waiters priority in Notify (#​7996)
• sync: fix panic in Chan::recv_many when called with non-empty vector on closed channel (#​7991)

v1.50.0: Tokio v1.50.0

Compare Source

1.50.0 (Mar 3rd, 2026)

Added

• net: add TcpStream::set_zero_linger (#​7837)
• rt: add is_rt_shutdown_err (#​7771)

Changed

• io: add optimizer hint that memchr returns in-bounds pointer (#​7792)
• io: implement vectored writes for write_buf (#​7871)
• runtime: panic when event_interval is set to 0 (#​7838)
• runtime: shorten default thread name to fit in Linux limit (#​7880)
• signal: remember the result of SetConsoleCtrlHandler (#​7833)
• signal: specialize windows Registry (#​7885)

Fixed

• io: always cleanup AsyncFd registration list on deregister (#​7773)
• macros: remove (most) local use declarations in tokio::select! (#​7929)
• net: fix GET_BUF_SIZE constant for target_os = "android" (#​7889)
• runtime: avoid redundant unpark in current_thread scheduler (#​7834)
• runtime: don't park in current_thread if before_park defers waker (#​7835)
• io: fix write readiness on ESP32 on short writes (#​7872)
• runtime: wake deferred tasks before entering block_in_place (#​7879)
• sync: drop rx waker when oneshot receiver is dropped (#​7886)
• runtime: fix double increment of num_idle_threads on shutdown (#​7910, #​7918, #​7922)

Unstable

• fs: check for io-uring opcode support (#​7815)
• runtime: avoid lock acquisition after uring init (#​7850)

Documented

• docs: update outdated unstable features section (#​7839)
• io: clarify the behavior of AsyncWriteExt::shutdown() (#​7908)
• io: explain how to flush stdout/stderr (#​7904)
• io: fix incorrect and confusing AsyncWrite documentation (#​7875)
• rt: clarify the documentation of Runtime::spawn (#​7803)
• rt: fix missing quotation in docs (#​7925)
• runtime: correct the default thread name in docs (#​7896)
• runtime: fix event_interval doc (#​7932)
• sync: clarify RwLock fairness documentation (#​7919)
• sync: clarify that recv returns None once closed and no more messages (#​7920)
• task: clarify when to use spawn_blocking vs dedicated threads (#​7923)
• task: doc that task drops before JoinHandle completion (#​7825)
• signal: guarantee that listeners never return None (#​7869)
• task: fix task module feature flags in docs (#​7891)
• task: fix two typos (#​7913)
• task: improve the docs of Builder::spawn_local (#​7828)
• time: add docs about auto-advance and when to use sleep (#​7858)
• util: fix typo in docs (#​7926)

v1.49.0: Tokio v1.49.0

Compare Source

1.49.0 (January 3rd, 2026)

Added

• net: add support for TCLASS option on IPv6 (#​7781)
• runtime: stabilize runtime::id::Id (#​7125)
• task: implement Extend for JoinSet (#​7195)
• task: stabilize the LocalSet::id() (#​7776)

Changed

• net: deprecate {TcpStream,TcpSocket}::set_linger (#​7752)

Fixed

• macros: fix the hygiene issue of join! and try_join! (#​7766)
• runtime: revert "replace manual vtable definitions with Wake" (#​7699)
• sync: return TryRecvError::Disconnected from Receiver::try_recv after Receiver::close (#​7686)
• task: remove unnecessary trait bounds on the Debug implementation (#​7720)

Unstable

• fs: handle EINTR in fs::write for io-uring (#​7786)
• fs: support io-uring with tokio::fs::read (#​7696)
• runtime: disable io-uring on EPERM (#​7724)
• time: add alternative timer for better multicore scalability (#​7467)

Documented

• docs: fix a typos in bounded.rs and park.rs (#​7817)
• io: add SyncIoBridge cross-references to copy and copy_buf (#​7798)
• io: doc that AsyncWrite does not inherit from std::io::Write (#​7705)
• metrics: clarify that num_alive_tasks is not strongly consistent (#​7614)
• net: clarify the cancellation safety of the TcpStream::peek (#​7305)
• net: clarify the drop behavior of unix::OwnedWriteHalf (#​7742)
• net: clarify the platform-dependent backlog in TcpSocket docs (#​7738)
• runtime: mention LocalRuntime in new_current_thread docs (#​7820)
• sync: add missing period to mpsc::Sender::try_send docs (#​7721)
• sync: clarify the cancellation safety of oneshot::Receiver (#​7780)
• sync: improve the docs for the errors of mpsc (#​7722)
• task: add example for spawn_local usage on local runtime (#​7689)

v1.48.0: Tokio v1.48.0

Compare Source

1.48.0 (October 14th, 2025)

The MSRV is increased to 1.71.

Added

• fs: add File::max_buf_size (#​7594)
• io: export Chain of AsyncReadExt::chain (#​7599)
• net: add SocketAddr::as_abstract_name (#​7491)
• net: add TcpStream::quickack and TcpStream::set_quickack (#​7490)
• net: implement AsRef<Self> for TcpStream and UnixStream (#​7573)
• task: add LocalKey::try_get (#​7666)
• task: implement Ord for task::Id (#​7530)

Changed

• deps: bump windows-sys to version 0.61 (#​7645)
• fs: preserve max_buf_size when cloning a File (#​7593)
• macros: suppress clippy::unwrap_in_result in #[tokio::main] (#​7651)
• net: remove PollEvented noise from Debug formats (#​7675)
• process: upgrade Command::spawn_with to use FnOnce (#​7511)
• sync: remove inner mutex in SetOnce (#​7554)
• sync: use UnsafeCell::get_mut in Mutex::get_mut and RwLock::get_mut (#​7569)
• time: reduce the generated code size of Timeout<T>::poll (#​7535)

Fixed

• macros: fix hygiene issue in join! and try_join! (#​7638)
• net: fix copy/paste errors in udp peek methods (#​7604)
• process: fix error when runtime is shut down on nightly-2025-10-12 (#​7672)
• runtime: use release ordering in wake_by_ref() even if already woken (#​7622)
• sync: close the broadcast::Sender in broadcast::Sender::new() (#​7629)
• sync: fix implementation of unused RwLock::try_* methods (#​7587)

Unstable

• tokio: use cargo features instead of --cfg flags for taskdump and io_uring (#​7655, #​7621)
• fs: support io_uring in fs::write (#​7567)
• fs: support io_uring with File::open() (#​7617)
• fs: support io_uring with OpenOptions (#​7321)
• macros: add local runtime flavor (#​7375, #​7597)

Documented

• io: clarify the zero capacity case of AsyncRead::poll_read (#​7580)
• io: fix typos in the docs of AsyncFd readiness guards (#​7583)
• net: clarify socket gets closed on drop (#​7526)
• net: clarify the behavior of UCred::pid() on Cygwin (#​7611)
• net: clarify the supported platform of set_reuseport() and reuseport() (#​7628)
• net: qualify that SO_REUSEADDR is only set on Unix (#​7533)
• runtime: add guide for choosing between runtime types (#​7635)
• runtime: clarify the behavior of Handle::block_on (#​7665)
• runtime: clarify the edge case of Builder::global_queue_interval() (#​7605)
• sync: clarify bounded channel panic behavior (#​7641)
• sync: clarify the behavior of tokio::sync::watch::Receiver (#​7584)
• sync: document cancel safety on SetOnce::wait (#​7506)
• sync: fix the docs of parking_lot feature flag (#​7663)
• sync: improve the docs of UnboundedSender::send (#​7661)
• sync: improve the docs of sync::watch (#​7601)
• sync: reword allocation failure paragraph in broadcast docs (#​7595)
• task: clarify the behavior of several spawn_local methods (#​7669)
• task: clarify the task ID reuse guarantees (#​7577)
• task: improve the example of poll_proceed (#​7586)

v1.47.5: Tokio v1.47.5

Compare Source

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)

v1.47.4: Tokio v1.47.4

Compare Source

1.47.4 (April 2nd, 2026)

Fixed

• sync: fix panic in Chan::recv_many when called with non-empty vector on closed channel (#​7991)

v1.47.3

Compare Source

v1.47.2

Compare Source

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Summary

This PR is an automated dependency update from Renovate that upgrades the tokio crate from version 1.47.1 to 1.52.2. The change only affects Cargo.lock, updating tokio and its transitive dependencies (tokio-macros, mio, socket2, libc) while removing several dependencies that are no longer required (backtrace, io-uring, addr2line, gimli, object, miniz_oxide, adler2, rustc-demangle). These removed dependencies were likely optional features that are no longer enabled by default.

Findings

• Nit Cargo.toml:4: The Rust edition is set to 2024, which is not yet a stable edition as of early 2026. This may cause compatibility issues with some toolchains. Consider using 2021 unless you have a specific need for nightly 2024 features.

• Non-blocking Cargo.lock: The tokio update includes versions 1.51.0-1.52.2 which had some performance-related changes (LIFO slot stealing) that were subsequently reverted in 1.52.2 due to performance regressions. The final version (1.52.2) is stable, but you may want to verify performance is acceptable after deployment.

• Nit src/main.rs:27: The application uses #[tokio::main] and tokio::spawn which are stable APIs. However, there are no unit or integration tests in the repository to verify the application works correctly after dependency updates. Consider adding basic tests that exercise the tokio runtime functionality.

• Non-blocking Cargo.lock: Several transitive dependencies were removed (backtrace, io-uring, etc.). If your deployment environment relies on backtrace for error reporting, you may want to verify error messages are still informative. The anyhow crate should still provide adequate error context.

Suggested next steps

This is a routine dependency update with low risk. The CI pipeline (cargo test, cargo clippy, cargo fmt) should validate the update before merge. I recommend:

1. Ensure CI passes with the updated dependencies
2. Consider adding basic integration tests to catch runtime issues from future dependency updates
3. Optionally verify the application starts and handles requests correctly in a staging environment after merge

Approval recommendation: ✅ Ready to merge pending CI success.