futures

• Bump MSRV of utility crates to 1.71. (#2989)
• Soft-deprecate ready! macro in favor of std::task::ready! added in Rust 1.64 (#2925)
• Soft-deprecate pin_mut! macro in favor of std::pin::pin! added in Rust 1.68 (#2929)
• Add FuturesOrdered::clear (#2927)
• Add mpsc::*Receiver::recv (#2947)
• Add mpsc::*Receiver::try_recv and deprecate mpsc::*Receiver::::try_next (#2944)
• Implement FusedStream for sink::With (#2948)
• Add no_std support for shared (#2868)
• Make Mutex::new() const (#2956)
• Add #[clippy::has_significant_drop] to guards (#2967)
• Remove dependency to pin-utils (#2929)
• Remove dependency on num_cpus (#2946)
• Performance improvements (#2983)
• Documentation improvements (#2925, #2926, #2940, #2971)

• Fix use after free of task in FuturesUnordered when dropped future panics (#2886)
• Fix soundness bug in task::waker_ref (#2830)
  This is a breaking change but allowed because it is soundness bug fix.
• Fix bugs in AsyncBufRead::read_line and AsyncBufReadExt::lines (#2884)
• Fix parsing issue in select!/select_biased! (#2832)
  This is technically a breaking change as it will now reject a very odd undocumented syntax that was previously accidentally accepted.
• Work around issue due to upstream Waker::will_wake change (#2865)
• Add stream::Iter::{get_ref,get_mut,into_inner} (#2875)
• Add future::AlwaysReady (#2825)
• Relax trait bound on non-constructor methods of io::{BufReader,BufWriter} (#2848)

• Add {BiLock,SplitStream,SplitSink,ReadHalf,WriteHalf}::is_pair_of (#2797)
• Fix panic in FuturesUnordered::clear (#2809)
• Fix panic in AsyncBufReadExt::fill_buf (#2801, #2812)
• Improve support for targets without atomic CAS (#2811)
• Remove build scripts (#2811)

• Add TryStreamExt::try_ready_chunks (#2757)
• Add TryStreamExt::{try_all,try_any} (#2783)
• Add UnboundedSender::{len,is_empty} (#2750)
• Fix Sync impl of FuturesUnordered (#2788)
• Fix infinite loop caused by invalid UTF-8 bytes (#2785)
• Fix build error with -Z minimal-versions (#2761)

• Update to syn 2. This raises MSRV of utility crates to 1.56. (#2730, #2733)
• Fix bug in FlattenUnordered (#2726, #2728)

• Add TryFlattenUnordered (#2577, #2590, #2606, #2607)
• Add AbortHandle::is_aborted (#2710)
• Add AbortRegistration::handle (#2712)
• Make BiLock strict-provenance compatible (#2716)

• Add Either::as_pin_mut and Either::as_pin_ref (#2691)
• Add Shared::ptr_eq and Shared::ptr_hash (#2691)
• Implement FusedStream for Buffered (#2676)
• Implement FusedStream for all streams in ReadyChunks (#2693)
• Fix bug in FuturesOrdered::push_front (#2664)
• Remove Fut::Output: Clone bounds from some Shared methods (#2662)
• Remove T: Debug bounds from Debug implementations of mpsc and oneshot types (#2666, #2667)

• Fix soundness issue in join! and try_join! macros (#2649)
• Implement Clone for sink::Drain (#2650)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Fix incorrect termination of select_with_strategy streams (#2635)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Work around MSRV increase due to a cargo bug.

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Fix Sync impl of BiLockGuard (#2570)
• Fix partial iteration in FuturesUnordered (#2574)
• Fix false detection of inner panics in Shared (#2576)
• Add Mutex::lock_owned and Mutex::try_lock_owned (#2571)
• Add io::copy_buf_abortable (#2507)
• Remove Unpin bound from TryStreamExt::into_async_read (#2599)
• Make run_until_stalled handle self-waking futures (#2593)
• Use FuturesOrdered in try_join_all (#2556)
• Fix orderings in LocalPool waker (#2608)
• Fix stream::Chunk adapters size hints (#2611)
• Add push_front and push_back to FuturesOrdered (#2591)
• Deprecate FuturesOrdered::push in favor of FuturesOrdered::push_back (#2591)
• Performance improvements (#2583, #2626)
• Documentation improvements (#2579, #2604, #2613)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Fix potential data race in FlattenUnordered that introduced in 0.3.20 (#2566)

Note: This release has been yanked due to a bug fixed in 0.3.21.

• Fix stacked borrows violations when -Zmiri-tag-raw-pointers is enabled. This raises MSRV of futures-task to 1.45. (#2548, #2550)
• Change FuturesUnordered to respect yielding from future (#2551)
• Add StreamExt::{flatten_unordered, flat_map_unordered} (#2083)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Remove unstable read-initializer feature (#2534)
• Fix panic in FuturesUnordered (#2535)
• Fix compatibility issue with FuturesUnordered and tokio's cooperative scheduling (#2527)
• Add StreamExt::count (#2495)

Note: This release has been yanked. See #2529 for details.

• Fix unusable Sink implementation on stream::Scan (#2499)
• Make task::noop_waker_ref available without std feature (#2505)
• Add async LineWriter (#2477)
• Remove dependency on proc-macro-hack. This raises MSRV of utility crates to 1.45. (#2520)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Use FuturesOrdered in join_all (#2412)
• Add {future, stream}::poll_immediate (#2452)
• Add stream_select! macro (#2262)
• Implement Default for OptionFuture (#2471)
• Add Peekable::{peek_mut, poll_peek_mut} (#2488)
• Add BufReader::seek_relative (#2489)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Add TryStreamExt::try_chunks (#2438)
• Add StreamExt::{all, any} (#2460)
• Add stream::select_with_strategy (#2450)
• Update to new io_slice_advance interface (#2454)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Use #[proc_macro] at Rust 1.45+ to fix an issue where proc macros don't work with rust-analyzer (#2407)
• Support targets that do not have atomic CAS on stable Rust (#2400)
• futures-test: Add async #[test] function attribute (#2409)
• Add stream::abortable (#2410)
• Add FuturesUnordered::clear (#2415)
• Implement IntoIterator for FuturesUnordered (#2423)
• Implement Send and Sync for FuturesUnordered iterators (#2416)
• Make FuturesUnordered::iter_pin_ref public (#2423)
• Add SelectAll::clear (#2430)
• Add SelectAll::{iter, iter_mut} (#2428)
• Implement IntoIterator for SelectAll (#2428)
• Implement Clone for WeakShared (#2396)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Add future::SelectAll::into_inner (#2363)
• Allow calling UnboundedReceiver::try_next after None (#2369)
• Reexport non-Ext traits from the root of futures_util (#2377)
• Add AsyncSeekExt::stream_position (#2380)
• Add stream::Peekable::{next_if, next_if_eq} (#2379)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Mitigated starvation issues in FuturesUnordered (#2333)
• Fixed race with dropping mpsc::Receiver (#2304)
• Added Shared::{strong_count, weak_count} (#2346)
• Added no_std support for task::noop_waker_ref (#2332)
• Implemented Stream::size_hint for Either (#2325)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Fixed Unpin impl of future::{MaybeDone, TryMaybeDone} where trait bounds were accidentally added in 0.3.9. (#2317)

Note: This release of futures-util has been yanked due to a bug fixed in 0.3.31 and a compile failure with futures-task 0.3.31 and later.

• Fixed heap buffer overflow in AsyncReadExt::{read_to_end, read_to_string} (#2314)

Note: This release has been yanked. See #2310 for details.

• Fixed type-inference in sink::unfold by specifying more of its types (breaking change -- see #2311)

Note: This release has been yanked. See #2310 for details.

• Significantly improved compile time when async-await crate feature is disabled (#2273)
• Added stream::repeat_with (#2279)
• Added StreamExt::unzip (#2263)
• Added sink::unfold (#2268)
• Added SinkExt::feed (#2155)
• Implemented FusedFuture for oneshot::Receiver (#2300)
• Implemented Clone for sink::With (#2290)
• Re-exported MapOkOrElse, MapInto, OkInto, TryFlatten, WriteAllVectored (#2275)

Note: This release has been yanked. See #2310 for details.

• Switched proc-macros to use native #[proc_macro] at Rust 1.45+ (#2243)
• Added WeakShared (#2169)
• Added TryStreamExt::try_buffered (#2245)
• Added StreamExt::cycle (#2252)
• Implemented Clone for stream::{Empty, Pending, Repeat, Iter} (#2248, #2252)
• Fixed panic in some TryStreamExt combinators (#2250)

Note: This release has been yanked. See #2310 for details.

• Fixed unsoundness in MappedMutexGuard (#2240)
• Re-exported TakeUntil (#2235)
• futures-test: Prevent double panic in panic_waker (#2236)

Note: This release has been yanked. See #2310 for details.

• Fixed UB due to missing 'static on task::waker (#2206)
• Added AsyncBufReadExt::fill_buf (#2225)
• Added TryStreamExt::try_take_while (#2212)
• Added is_connected_to method to mpsc::{Sender, UnboundedSender} (#2179)
• Added is_connected_to method to oneshot::Sender (#2158)
• Implement FusedStream for FuturesOrdered (#2205)
• Fixed documentation links
• Improved documentation
• futures-test: Added track_closed method to AsyncWriteTestExt and SinkTestExt (#2159)
• futures-test: Implemented more traits for InterleavePending (#2208)
• futures-test: Implemented more traits for AssertUnmoved (#2208)

Note: This release has been yanked. See #2310 for details.

• Added StreamExt::flat_map.
• Added StreamExt::ready_chunks.
• Added *_unpin methods to SinkExt.
• Added a cancellation() future to oneshot::Sender.
• Added reunite method to ReadHalf and WriteHalf.
• Added Extend implementations for Futures(Un)Ordered and SelectAll.
• Added support for reexporting the join! and select! macros.
• Added no_std support for the pending! and poll! macros.
• Added Send and Sync support for AssertUnmoved.
• Fixed a bug where Shared wasn't relinquishing control to the executor.
• Removed the Send bound on the output of RemoteHandle.
• Relaxed bounds on FuturesUnordered.
• Reorganized internal tests to work under different --features.
• Reorganized the bounds on StreamExt::forward.
• Removed and replaced a large amount of internal unsafe.

Note: This release has been yanked. See #2310 for details.

• Fixed missing Drop for UnboundedReceiver (#2064)

Note: This release has been yanked. See #2310 for details.

• Fixed compatibility issue with pinned facade (#2062)

Note: This release has been yanked. See #2310 for details.

• Improved buffering performance of SplitSink (#1969)
• Added select_biased! macro (#1976)
• Added hash_receiver method to mpsc channel (#1962)
• Added stream::try_unfold (#1977)
• Fixed bug with zero-size buffers in vectored IO (#1998)
• AtomicWaker::new() is now const fn (#2007)
• Fixed bug between threadpool and user park/unparking (#2010)
• Added stream::Peekable::peek (#2021)
• Added StreamExt::scan (#2044)
• Added impl of AsyncRead/Write for BufReader/Writer (#2033)
• Added impl of Spawn and LocalSpawn for Arc<impl Spawn and Rc<impl Spawn> (#2039)
• Fixed Sync issues with FuturesUnordered (#2054)
• Added into_inner method for future::Ready (#2055)
• Added MappedMutexGuard API (#2056)
• Mitigated starvation issues in FuturesUnordered (#2049)
• Added TryFutureExt::map_ok_or_else (#2058)

Note: This release has been yanked. See #2310 for details.

• Fix signature of SpawnExt and LocalSpawnExt trait (breaking change -- see #1959)

Note: This release has been yanked. See #2310 for details.

• Stable release along with stable async/await!
• Added async/await to default features (#1953)
• Changed Spawn trait and FuturesUnordered::push to take &self (#1950)
• Moved Spawn and FutureObj out of futures-core and into futures-task (#1925)
• Changed case convention for feature names (#1937)
• Added executor feature (#1949)
• Moved copy_into/copy_buf_into (#1948)
• Changed SinkExt::send_all to accept a TryStream (#1946)
• Removed ThreadPool::run (#1944)
• Changed to use our own definition of io::Cursor (#1943)
• Removed BufReader::poll_seek_relative (#1938)
• Changed skip to take a usize rather than u64 (#1931)
• Removed Stream impl for VecDeque (#1930)
• Renamed Peekable::peek to poll_peek (#1928)
• Added immutable iterators for FuturesUnordered (#1922)
• Made ThreadPool optional (#1910)
• Renamed oneshot::Sender::poll_cancel to poll_canceled (#1908)
• Added some missing Clone implementations
• Documentation fixes

• Add a close method on sink::Wait
• Undeprecate stream::iter as stream::iter_result
• Improve performance of wait-related methods
• Tweak buffered sinks with a 0 capacity to forward directly to the underlying sink.
• Add FromIterator implementation for FuturesOrdered and FuturesUnordered.

• A prelude module has been added to glob import from and pick up a whole bunch of useful types
• sync::mpsc::Sender::poll_ready has been added as an API
• sync::mpsc::Sender::try_send has been added as an API

• Improve performance of BiLock methods
• Implement Clone for FutureResult
• Forward Stream trait through SinkMapErr
• Add stream::futures_ordered next to futures_unordered
• Reimplement Stream::buffered on top of stream::futures_ordered (much more efficient at scale).
• Add a with_notify function for abstractions which previously required UnparkEvent.
• Add get_ref/get_mut/into_inner functions for stream take/skip methods
• Add a Clone implementation for SharedItem and SharedError
• Add a mpsc::spawn function to spawn a Stream into an Executor
• Add a reunite function for BiLock and the split stream/sink types to rejoin two halves and reclaim the original item.
• Add stream::poll_fn to behave similarly to future::poll_fn
• Add Sink::with_flat_map like Iterator::flat_map
• Bump the minimum Rust version to 1.13.0
• Expose AtomicTask in the public API for managing synchronization around task notifications.
• Unify the Canceled type of the sync and unsync modules.
• Deprecate the boxed methods. These methods have caused more confusion than they've solved historically, so it's recommended to use a local extension trait or a local helper instead of the trait-based methods.
• Deprecate the Stream::merge method as it's less ergonomic than select.
• Add oneshot::Sender::is_canceled to test if a oneshot is canceled off a task.
• Deprecates UnboundedSender::send in favor of a method named unbounded_send to avoid a conflict with Sink::send.
• Deprecate the stream::iter function in favor of an stream::iter_ok adaptor to avoid the need to deal with Result manually.
• Add an inspect function to the Future and Stream traits along the lines of Iterator::inspect