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Ran 15 Oct 2026 10:03PM UTC

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Build # 38814238320

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Commit Message

Fixed socket aclose() delayed close, missing checkpoint and Windows hang (#1289)

On the asyncio backend, SocketStream, UDPSocket and ConnectedUDPSocket closed through transport.close(), which only schedules the FD-closing connection_lost callback via loop.call_soon. A second, concurrent aclose() -- as
aclose_forcefully() can produce -- therefore returned while the socket was still open, and on Windows closing a UDP socket with a datagram still in flight could hang outright. All three now abort() the transport directly, which also makes DatagramProtocol.closed_event unnecessary.

None of the implementations checkpointed either, so aclose() called inside an already-cancelled scope returned normally instead of raising a cancellation exception. This affected UNIX socket streams and UNIX datagram sockets on
asyncio, and every socket type on Trio.

_RawSocketMixin.aclose() now always closes the raw socket and checkpoints, while still resolving pending receive and send futures only on the first call, so a task blocked in receive() or send() is woken exactly once.

Fixes #1237.
Fixes #1273.
Fixes #1288.

---------

Co-authored-by: Alex Grönholm <alex.gronholm@nextday.fi>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

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