gh-115957: Close coroutine if TaskGroup.create_task() raises an error (#116009)

2 files changed, 13 insertions, 0 deletions

diff --git a/Doc/library/asyncio-task.rst b/Doc/library/asyncio-task.rst
index 24bd36e..2aab62c 100644
--- a/Doc/library/asyncio-task.rst
+++ b/Doc/library/asyncio-task.rst
@@ -334,6 +334,13 @@ and reliable way to wait for all tasks in the group to finish.
 
       Create a task in this task group.
       The signature matches that of :func:`asyncio.create_task`.
+      If the task group is inactive (e.g. not yet entered,
+      already finished, or in the process of shutting down),
+      we will close the given ``coro``.
+
+      .. versionchanged:: 3.13
+
+         Close the given coroutine if the task group is not active.
 
 Example::
 
diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst
index 96c8aee..137dbe6 100644
--- a/Doc/whatsnew/3.13.rst
+++ b/Doc/whatsnew/3.13.rst
@@ -185,6 +185,12 @@ Other Language Changes
 
   (Contributed by Sebastian Pipping in :gh:`115623`.)
 
+* When :func:`asyncio.TaskGroup.create_task` is called on an inactive
+  :class:`asyncio.TaskGroup`, the given coroutine will be closed (which
+  prevents a :exc:`RuntimeWarning` about the given coroutine being
+  never awaited).
+
+  (Contributed by Arthur Tacca and Jason Zhang in :gh:`115957`.)
 
 New Modules
 ===========