TaskGroup.create_task() doesn't mention it raises RuntimeError #156662

Documentation

The docs say an inactive task group will close the given coro, but create_task() also raises RuntimeError

asyncio-task.rst:359:

we will close the given ``coro``.

Repro:

import asyncio

async def nop(): pass

async def main():
    tg = asyncio.TaskGroup()
    tg.create_task(nop())

asyncio.run(main())

Will output:

RuntimeError: TaskGroup <TaskGroup> has not been entered

Proposed fix: mention that it will raise RuntimeError

Have a fix for that

Linked PRs

• gh-156662: Note that TaskGroup.create_task() raises RuntimeError #156663
• [3.13] gh-156662: Note that TaskGroup.create_task() raises RuntimeError (GH-156663) #157315
• [3.15] gh-156662: Note that TaskGroup.create_task() raises RuntimeError (GH-156663) #157316
• [3.14] gh-156662: Note that TaskGroup.create_task() raises RuntimeError (GH-156663) #157317