Issues

• Intermittent segfault in test suite on Python 3.11 CI job

  agronholm/anyio#1387 · Filter by author graingert opened on Oct 6, 2026
  1

• TLSStream.send loses an already-encrypted record when cancelled, corrupting the TLS stream

  bug
  agronholm/anyio#1385 · Filter by author doerus opened on Oct 5, 2026
  5

• connect_tcp() leaks a connected socket when an enclosing scope is cancelled after the connect succeeds

  agronholm/anyio#1364 · Filter by author AnandChowdhary opened on Sep 29, 2026

• Exception raised by a start()ed child during cancellation is lost on asyncio

  agronholm/anyio#1356 · Filter by author hsusul opened on Sep 28, 2026

• Hypothesis async tests don't actually run on all parametrized anyio backends

  bugpytest plugin
  agronholm/anyio#1353 · Filter by author EmmanuelNiyonshuti opened on Sep 27, 2026

• Non-daemon to_thread worker deadlocks interpreter exit: cleanup never fires if pending tasks aren't drained

  bug
  agronholm/anyio#1344 · Filter by author rfilmyer opened on Sep 23, 2026
  8

• Add an async interface for calling into an event loop running in another thread

  enhancement
  agronholm/anyio#1342 · Filter by author davidbrochart opened on Sep 23, 2026

• Extend concurrency helper utilities to work with async iterables for arguments

  enhancement
  agronholm/anyio#1310 · Filter by author injust opened on Sep 4, 2026
  2

• Defer move_on_after() timer start to its use as a context manager

  agronholm/anyio#1298 · Filter by author agronholm opened on Aug 28, 2026 · 5.0
  1

• UNIXSocket.aclose and _TrioSocketMixin.aclose in cancelled scope does not raise a cancelled error (does not checkpoint)

  bug
  agronholm/anyio#1288 · Filter by author graingert opened on Aug 23, 2026
  1

• concurrent anyio.aclose_forcefully fails to block until socket is closed on asyncio

  bug
  agronholm/anyio#1273 · Filter by author graingert opened on Aug 12, 2026
  18

• Fallbacks for threading-less environment?

  enhancement
  agronholm/anyio#1268 · Filter by author ryanking13 opened on Aug 6, 2026
  17

• Expose a sendfile API for socket streams

  enhancement
  agronholm/anyio#1259 · Filter by author graingert opened on Jul 31, 2026
  1

• _deliver_cancellation re-arms for tasks skipped via _must_cancel, for which the retry can never do anything

  agronholm/anyio#1258 · Filter by author ZacharyHampton opened on Jul 30, 2026

• asyncio backend: race in SocketStream.aclose() — transport.abort() raises AttributeError: 'NoneType' object has no attribute 'call_soon'

  agronholm/anyio#1250 · Filter by author ransomr opened on Jul 29, 2026

• BrokenResourceError is the wrong error for a temporary Windows UDP reset

  bug
  agronholm/anyio#1239 · Filter by author graingert opened on Jul 24, 2026
  3

• UDPSocket.aclose() hangs on Windows when a send is in flight (regression from #1147)

  agronholm/anyio#1237 · Filter by author graingert opened on Jul 21, 2026

• connect_tcp blindly prioritizes IPv6 even when the system has no globally routable IPv6 address

  agronholm/anyio#1230 · Filter by author kevin-lucifer opened on Jul 18, 2026

• add an AnyIO equivalent of trio.as_safe_channel

  enhancement
  agronholm/anyio#1192 · Filter by author graingert opened on Jun 28, 2026
  3

• Remove subinterpreter support for Python 3.13

  agronholm/anyio#1158 · Filter by author agronholm opened on May 30, 2026 · 5.0

• CancelledError leaks from connect_tcp happy eyeballs on Python 3.14

  bug
  agronholm/anyio#1094 · Filter by author fgeracitano opened on Mar 19, 2026
  9

• TaskGroup doesn't raise cancelled when it should on asyncio

  bug
  agronholm/anyio#1070 · Filter by author gschaffner opened on Feb 13, 2026
  1

• TaskGroup.__aexit__ visits a cancel point on asyncio

  bug
  agronholm/anyio#1069 · Filter by author gschaffner opened on Feb 13, 2026

• test_raise_baseexception_from_task occasionally deadlocks

  bug
  agronholm/anyio#1014 · Filter by author gschaffner opened on Oct 26, 2025
  8

• test_unretrieved_future_exception_server_crash fails with EndOfStream

  bug
  agronholm/anyio#986 · Filter by author mtelka opened on Sep 26, 2025
  7