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This PR contains the following updates:

Package	Change	Age	Confidence
anyio (changelog)	==4.15.1 → ==4.16.0

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Release Notes

agronholm/anyio (anyio)

v4.16.0

Compare Source

New features

• Added BlockingPortal.call_async() for asynchronously calling into an event loop with optional abandonment on cancellation (#​1342; PR by @​davidbrochart)
• Added SOCK_SEQPACKET support to connect_unix() and create_unix_listener() (#​1349; PR by @​theunkn0wn1)

Other changes

• Changed UDP sockets on the asyncio backend to make send() wait until the datagram has been passed to the operating system (#​1294; PR by @​graingert)

Bug fixes

• Fixed documentation implying that use_uvloop=True falls back to the standard event loop when uvloop (winloop on Windows) is not installed, and showed how to skip the corresponding pytest backend variant when the dependency is missing (#​645; PR by @​GruffElixir)
• Fixed get_current_task() on the asyncio backend raising an opaque TypeError: cannot create weak reference to 'NoneType' object instead of a clear error when called from a callback scheduled via loop.call_soon_threadsafe() (e.g. from within from_thread.run_sync()), where asyncio.current_task() is legitimately None (#​773; PR by @​AmirF194)
• Fixed CancelScope on the asyncio backend swallowing a native Task.cancel() that was delivered in the same event loop iteration as the scope's own cancellation (such as a move_on_after() deadline expiring), which left the host task with a pending cancellation request that never raised CancelledError (#​1214)
• Fixed UDP socket closing hanging if a datagram send was still in flight (#​1237; PR by @​graingert)
• Fixed concurrent aclose_forcefully() calls on asyncio socket streams returning before the underlying socket was closed (#​1273; PR by @​graingert)
• Fixed aclose() on sockets not checkpointing, and thus failing to raise a cancellation exception when called inside a cancelled scope (affected UNIX socket streams and UNIX datagram sockets on asyncio, and all sockets on Trio) (#​1288; PR by @​graingert)
• Fixed aclose() on asyncio TCP socket listeners not checkpointing, and leaking the listening socket if cancelled while another task was waiting in accept() (#​1289; PR by @​graingert)
• Fixed accept() on asyncio UNIX socket listeners hanging forever, and leaving the listening socket registered with the event loop, when the listener was closed by another task (#​1289; PR by @​graingert)
• Fixed send() on asyncio TCP and UDP sockets returning normally, despite the data being discarded, when the socket was closed by another task (or, for TCP, the connection was lost) while send() was waiting for the operating system to accept the data (#​1289; PR by @​graingert)
• Fixed SocketStream.send() on the asyncio backend handing its data to a paused transport after a previous send() was cancelled (#​1299; PR by @​graingert)
• Fixed sleep() treating a negative delay (including -inf) inconsistently across backends (asyncio returned immediately; Trio raised ValueError) by raising ValueError on all backends (#​1306; PR by @​BetterAndBetterII)
• Fixed create_tcp_listener() occasionally failing with a message like Could not create 2 listeners with a consistent port when an ephemeral port is requested and IPv6 is enabled and the dual-stack path is not available or a specific local host name was given (#​1313)
• Fixed AsyncFile not shielding against cancellation while closing (#​1314)
• Fixed TemporaryDirectory.cleanup() reacting to cancellation prematurely when the host task was already cancelled, causing the actual cleanup operation to be skipped (#​1316; PR by @​Yasser-Ameur)
• Fixed a NaN deadline being accepted on asyncio while Trio raised ValueError, which silently disabled the timeout (fail_after(math.nan) returned instead of raising TimeoutError); CancelScope now rejects it on both backends (#​1317; PR by @​dylanpulver)
• Fixed FileReadStream and FileWriteStream leaving files open when cancelled during context manager exit, including unflushed writes (#​1318; PR by @​Kuang-xianxin)
• Fixed Condition.notify() and Condition.notify_all() failing when the underlying lock was acquired directly rather than through the condition (#​1319; PR by @​GruffElixir)
• Fixed importing AnyIO with loaders that do not provide __file__, such as PyOxidizer, raising TypeError instead of falling back to eager imports (#​1322; PR by @​skulitom)
• Fixed text receive streams silently discarding incomplete characters at end-of-file instead of applying the configured decoding error handler (#​1339; PR by @​Aurelucien)
• Fixed Semaphore(fast_acquire=True) losing its fast-acquire behavior when instantiated outside a running event loop (#​1348; PR by @​feiiiiii5)
• Fixed BlockingPortalProvider permanently failing with an AttributeError on every subsequent use if the first attempt to start its blocking portal failed (#​1350; PR by @​Yasser-Ameur)
• Fixed create_udp_socket() silently ignoring the local_port argument when local_host was omitted, making the socket bind to a random ephemeral port instead of the requested one (#​1351; PR by @​januththedev)
• Fixed worker threads on the asyncio backend never returning to the idle pool (and thus never being reused or pruned) when a to_thread.run_sync() call was cancelled after it had been queued for the worker but before the worker thread had picked it up (#​1352; PR by @​Zac-HD)
• Fixed pytest plugin running Hypothesis async tests only on the first parametrized backend instead of each backend (#​1353; PR by @​DYNOSuprovo)
• Fixed TypeError when subclassing an existing TypedAttributeSet subclass, and this subclass contains type annotations (#​1358; PR by @​pasmud)
• Fixed Lock.locked() (and Condition.locked()) raising NoEventLoopError when the lock was created outside a running event loop (#​1362; PR by @​00200200)
• Fixed connect_tcp() leaking a connected socket when an enclosing cancel scope was cancelled before the connection attempt task group exited (#​1364; PR by @​charan-rathore)
• Fixed create_connected_udp_socket() silently ignoring local_port when local_host was not given: the local address was left unset, so the OS picked an ephemeral port instead of the requested one (#​1365; PR by @​feiiiiii5)
• Fixed BlockingPortalProvider not passing the exception raised in its with block on to the start_blocking_portal() context manager it wraps (#​1366; PR by @​feiiiiii5)
• Fixed anyio.itertools.islice() not consuming the first start items when stop <= start (#​1372; PR by @​Rodrigo-Palma)
• Fixed BufferedByteReceiveStream.receive_exactly() and receive_until() returning buffered data after explicit closure instead of raising ClosedResourceError (#​1378; PR by @​kokotatan)
• Fixed a TLS stream sending records the peer could no longer decrypt after a cancelled send() lost an already-encrypted record; the stream now raises BrokenResourceError on further use instead (#​1385; PR by @​Kayvan-Zahiri)
• Fixed close() on memory object streams not waking up tasks blocked in send() or receive() on the same stream (#​1391)
• Fixed anyio.itertools.product() acquiring and consuming unused input iterables when repeat=0 (#​1394; PR by @​sricharanreddycheruku)
• Fixed SpooledTemporaryFile rolling over to disk on writes when max_size is zero (the default) (#​1397; PR by @​fhgffy)
• Fixed Trio UDP sockets remaining open when initialization failed or was cancelled (#​1400; PR by @​adenzhou1350)
• Fixed SpooledTemporaryFile.rollover() moving the current file position to the end of the file (#​1401; PR by @​fhgffy)
• Fixed cancellation during temporary directory creation leaving the directory behind while its context manager is retained (#​1403; PR by @​adenzhou1350)
• Fixed cancellation during SpooledTemporaryFile.rollover() losing buffered contents (#​1404; PR by @​adenzhou1350)
• Fixed TextSendStream.send() re-emitting the byte order mark on every item with BOM-emitting encodings (utf-16, utf-32, utf-8-sig), which made the peer decode a stray \ufeff in front of every message after the first (#​1405; PR by @​feiiiiii5)
• Fixed buffered byte streams returning empty bytes when a wrapped object stream received empty messages instead of waiting for data or raising EndOfStream (#​1409; PR by @​00200200)
• Fixed BlockingPortal crashing with InvalidStateError when a future it returned was cancelled just as the callable was completing (#​1410; PR by @​adenzhou1350)
• Fixed UNIXSocketStream.send_fds() silently truncating messages on short socket writes (#​1422; PR by @​AryanRG)
• Fixed cancelled TCP receives on the asyncio backend leaving transport reads enabled, allowing incoming data to accumulate while the application was not receiving. (#​1423; PR by @​Master-Norna)
• Fixed CapacityLimiter.acquire_on_behalf_of() on asyncio releasing the wrong borrower when the acquiring task was cancelled during the cancel-shielded checkpoint that runs after a non-blocking acquisition

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