[Python-checkins] bpo-44508: [Doc] Document failure mode for loop.call_soon_threadsafe (GH-27688) (GH-27805)

ambv webhook-mailer at python.org
Tue Aug 17 19:18:27 EDT 2021

commit: e2320c6a34d44a0efa7ecc693c3a6215014b7b6e
branch: 3.9
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: ambv <lukasz at langa.pl>
date: 2021-08-18T01:18:22+02:00

bpo-44508: [Doc] Document failure mode for loop.call_soon_threadsafe (GH-27688) (GH-27805)

Co-authored-by: Łukasz Langa <lukasz at langa.pl>
(cherry picked from commit 3240bc62f4e0afa09964f3afc845697f0a0806b9)

Co-authored-by: meowmeowmeowcat <meowmeowcat1211 at gmail.com>

M Doc/library/asyncio-eventloop.rst

diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index 66eb3faecd896..4a64475f2a939 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -211,6 +211,10 @@ Scheduling callbacks
    A thread-safe variant of :meth:`call_soon`.  Must be used to
    schedule callbacks *from another thread*.
+   Raises :exc:`RuntimeError` if called on a loop that's been closed.
+   This can happen on a secondary thread when the main application is
+   shutting down.
    See the :ref:`concurrency and multithreading <asyncio-multithreading>`
    section of the documentation.

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