1.44.0 (March 7th, 2025)

This release changes the from_std method on sockets to panic if a blocking socket is provided. We determined this change is not a breaking change as Tokio is not intended to operate using blocking sockets. Doing so results in runtime hangs and should be considered a bug. Accidentally passing a blocking socket to Tokio is one of the most common user mistakes. If this change causes an issue for you, please comment on #7172.

Added

• coop: add task::coop module (#7116)
• process: add Command::get_kill_on_drop() (#7086)
• sync: add broadcast::Sender::closed (#6685, #7090)
• sync: add broadcast::WeakSender (#7100)
• sync: add oneshot::Receiver::is_empty() (#7153)
• sync: add oneshot::Receiver::is_terminated() (#7152)

Fixed

• fs: empty reads on File should not start a background read (#7139)
• process: calling start_kill on exited child should not fail (#7160)
• signal: fix CTRL_CLOSE, CTRL_LOGOFF, CTRL_SHUTDOWN on windows (#7122)
• sync: properly handle panic during mpsc drop (#7094)

Changes

• runtime: clean up magic number in registration set (#7112)
• coop: make coop yield using waker defer strategy (#7185)
• macros: make select! budget-aware (#7164)
• net: panic when passing a blocking socket to from_std (#7166)
• io: clean up buffer casts (#7142)

Changes to unstable APIs

• rt: add before and after task poll callbacks (#7120)
• tracing: make the task tracing API unstable public (#6972)

Documented

• docs: fix nesting of sections in top-level docs (#7159)
• fs: rename symlink and hardlink parameter names (#7143)
• io: swap reader/writer in simplex doc test (#7176)
• macros: docs about select! alternatives (#7110)
• net: rename the argument for send_to (#7146)
• process: add example for reading Child stdout (#7141)
• process: clarify Child::kill behavior (#7162)
• process: fix grammar of the ChildStdin struct doc comment (#7192)
• runtime: consistently use worker_threads instead of core_threads (#7186)