1.51.6 (October 13th, 2026)

Added

• io: add AsyncFd::register and AsyncFd::register_with_interest (#8587)

Changed

• io: deprecate AsyncFd::{new, with_interest, try_new, try_with_interest} (#8587)

Fixed

• io: wake and drop DuplexStream wakers outside the lock (#8618)
• macros: avoid unreachable_code in join! and try_join! for Infallible (#8518)
• runtime: fix paused time auto-advancing when I/O wakes a task on current_thread (#8595)
• sync: wake waiters outside the lock when closing a semaphore (#8529)
• test: fix several flaky tests (#8196, #8427, #8609)