bpo-44508: [Doc] Document failure mode for loop.call_soon_threadsafe (GH-27688)
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
(cherry picked from commit 3240bc62f4e0afa09964f3afc845697f0a0806b9)
Co-authored-by: meowmeowmeowcat <meowmeowcat1211@gmail.com>
diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index b1609f7..eee8095 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -216,6 +216,10 @@
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.