1.53.2 (October 3rd, 2026)

Fixed

• fs: handle integer overflow in buffered relative seek (#8574)
• io: revert "always cleanup AsyncFd registration list on deregister" (#8540)
• process: unregister Windows wait before closing child handle (#8564)
• rt: drop blocking pool mutex before shutting down rejected task (#8562)
• sync: fix mpsc index wraparound in block reclamation (#8546)
• sync: forget mpsc Permit before sending value (#8560)
• sync: validate MAX_PERMITS in Semaphore::acquire (#8548)
• sync: wake broadcast Sender::closed outside mutex (#8558)
• task: drop replaced waker outside lock in JoinSet (#8554)
• time: drop timer lock before dropping waker in clear_entry (#8552)
• time: expire timers directly on shutdown without rotating wheel (#8570)

Fixed (unstable)

• fs: clamp io_uring read length to u32::MAX (#8572)
• rt: ignore current_thread task dumps from other runtimes (#8544)
• rt: preserve io_uring context if a completion waker panics (#8566)
• sync: fix semaphore use-after-free and permit leak on tracing panic (#8542)
• taskdump: restore deferred leaf wakes during capture (#8445)
• time: drop stored waker when cancelling alt timer entry (#8550)

1.51.5 (October 3rd, 2026)

Fixed

• fs: handle integer overflow in buffered relative seek (#8574)
• io: revert "always cleanup AsyncFd registration list on deregister" (#8540)
• process: unregister Windows wait before closing child handle (#8564)
• rt: drop blocking pool mutex before shutting down rejected task (#8562)
• sync: fix mpsc index wraparound in block reclamation (#8546)
• sync: forget mpsc Permit before sending value (#8560)
• sync: validate MAX_PERMITS in Semaphore::acquire (#8548)
• sync: wake broadcast Sender::closed outside mutex (#8558)
• task: drop replaced waker outside lock in JoinSet (#8554)
• time: drop timer lock before dropping waker in clear_entry (#8552)
• time: expire timers directly on shutdown without rotating wheel (#8570)

Fixed (unstable)

• rt: ignore current_thread task dumps from other runtimes (#8544)
• rt: preserve io_uring context if a completion waker panics (#8566)
• sync: fix semaphore use-after-free and permit leak on tracing panic (#8542)
• time: drop stored waker when cancelling alt timer entry (#8550)

1.53.1 (July 20th, 2026)

Fixed

• signal: restore MSRV by removing OnceLock::wait from the Windows handler (#8300)

Fixed (unstable)

• time: fix alt timer cancellation and insertion race (#8252)

Documented

• runtime: remove dead link definition in Runtime::block_on (#8301)

1.53.0 (July 17th, 2026)

Added

• fs: implement From<OwnedFd> and From<OwnedHandle> for File (#8266)
• metrics: add task schedule latency metric (#7986)
• net: add SocketAddr methods to Unix sockets (#8144)

Changed

• io: add #[inline] to IO trait impls for in-memory types (#8242)
• net: implement UCred::pid on FreeBSD (#8086)
• net: support Nuttx target os (#8259)
• signal: refactor global variables on Windows (#8231)
• sync: mpsc::{Receiver,UnboundedReceiver} now drops waker on drop, even if there are still senders (#8095)
• taskdump: support taskdumps on s390x (#8192)
• time: add #[track_caller] to timeout_at() (#8077)
• time: consolidate mutex locks on spurious poll (#8124)
• time: defer waker clone on spurious poll (#8107)
• time: move lazy-registration state into Sleep (#8132)
• tracing: remove unnecessary span clone (#8126)

Fixed

• io: do not treat zero-length reads as EOF in Chain (#8251)
• net: use getpeereid for QNX peer credentials (#8270)
• runtime: avoid illegal state in FastRand (#8078)
• sync: wake mpsc receiver when a queued reserve[_many] returns permits (#8260)
• taskdump: skip double wake on Trace::capture/Trace::trace_with (#8043)
• time: avoid stack overflow in runtime constructor (#8093)
• time (alt timer): ensure timers stay in the same runtime after .reset() (#8169)

IO uring (unstable)

• fs: use io-uring for fs::try_exists (#8080)
• fs: use io-uring for renaming files (#7800)
• rt: flush io-uring CQE in case of CQE overflow (#8277)

Documented

• docs: clarify cancel safety wording (#8181)
• fs: clarify create_dir_all succeeds if path exists (#8149)
• io: add warning about stdout reordering with multiple handles (#8276)
• net: document pipe try_read*/try_write* readiness behavior (#8032)
• runtime: document interaction with fork() (#8202)
• sync: clarify broadcast lagging semantics (#8239)
• sync: document memory ordering guarantees for Semaphore (#8119)
• task: explain why yield_now defers its waker (#8254)
• time: add panic docs to timeout_at() (#8077)
• time: fix reversed poll order in timeout doc (#8214)

1.52.4 (July 16th, 2026)

Fixed

• runtime: don't skip the driver when before_park schedules work (#8222)

Fixed (unstable)

• taskdump: remove crate disambiguators from output (#8264)

1.51.4 (July 16th, 2026)

Fixed

• runtime: don't skip the driver when before_park schedules work (#8222)

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)

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)

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)

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)