asyncio random crash with longtime run

[twbt4f]

BPO	44271
Nosy	@asvetlov, @1st1, @iritkatriel
Files	wait.py

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-05-31.07:58:01.818>
labels = ['3.9', 'type-crash', 'expert-asyncio']
title = 'asyncio random crash with longtime run'
updated_at = <Date 2021-05-31.13:02:50.991>
user = 'https://bugs.python.org/twbt4f'

bugs.python.org fields:

activity = <Date 2021-05-31.13:02:50.991>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['asyncio']
creation = <Date 2021-05-31.07:58:01.818>
creator = 'twbt4f'
dependencies = []
files = ['50074']
hgrepos = []
issue_num = 44271
keywords = []
message_count = 3.0
messages = ['394790', '394794', '394796']
nosy_count = 4.0
nosy_names = ['asvetlov', 'yselivanov', 'iritkatriel', 'twbt4f']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue44271'
versions = ['Python 3.9']

[twbt4f]

import asyncio
import timeit

num = 0


async def test():
    global num
    num += 1
    print(f"done task {num}")
    return f"task: {num}"


async def main():
    task = asyncio.create_task(test())

# ko = await test()
# print(await task, ko)

if __name__ == '__main__':
    number = 1000000
    while number:
        number -= 1
        asyncio.run(main())
    print("are you ok")
    # time_stage = timeit.timeit("asyncio.run(main())", globals=globals(), number=100000)
    # print(time_stage)

[iritkatriel]

What’s the output, what system are you using?

[twbt4f]

I test it on
OS :Windows 10 Pro x64
Python: 3.9.5 x64

This Code if work will it will print "are you ok" and stop.
bug it print a random line like "done task 20897" ,stop print ,press Ctrl+C cannot break it.