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Description
Bug report
Bug description:
asyncio's staggered_race crashes when an eager task factory is being used:
import asyncio
async def main():
asyncio.get_running_loop().set_task_factory(asyncio.eager_task_factory)
await asyncio.open_connection("example.com", 80, happy_eyeballs_delay=0.25)
asyncio.run(main())Traceback (most recent call last):
[...]
File "/tmp/repro.py", line 5, in main
await asyncio.open_connection("example.com", 80, happy_eyeballs_delay=0.25)
File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/streams.py", line 48, in open_connection
transport, _ = await loop.create_connection(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/base_events.py", line 1109, in create_connection
sock, _, _ = await staggered.staggered_race(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/staggered.py", line 144, in staggered_race
raise d.exception()
File "/opt/homebrew/Cellar/python@3.12/3.12.6/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/staggered.py", line 101, in run_one_coro
assert len(running_tasks) == this_index + 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError
See also: aio-libs/aiohttp#8599
CPython versions tested on:
3.12
Operating systems tested on:
macOS
Linked PRs
- gh-124309: Fix the AssertionError when using the happy_eyeballs_delay argument in open_connection #124311
- gh-124309: Modernize the
staggered_raceimplementation to support eager task factories #124390 - [3.13] gh-124309: Modernize the
staggered_raceimplementation to support eager task factories (GH-124390) #124573 - [3.12] gh-124309: Modernize the
staggered_raceimplementation to support e… #124574 - gh-124309: Revert eager task factory fix to prevent breaking downstream #124810
- [3.12] gh-124309: Revert eager task factory fix to prevent breaking downstream (GH-124810) #124817
- gh-124309: fix staggered race on eager tasks #124847
- [3.13] gh-124309: fix staggered race on eager tasks (GH-124847) #125339
- [3.12] gh-124309: fix staggered race on eager tasks (GH-124847) #125340
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