[New-bugs-announce] [issue39698] asyncio.sleep() does not adhere to time.sleep() behavior for negative numbers

[Marco Sulla]

New submission from Marco Sulla <launchpad.net at marco.sulla.e4ward.com>:

Python 3.9.0a3+ (heads/master-dirty:f2ee21d858, Feb 19 2020, 23:19:22) 
[GCC 9.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import time
>>> time.sleep(-1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: sleep length must be non-negative
>>> import asyncio
>>> async def f():
...     await asyncio.sleep(-1)
...     print("no exception")
... 
>>> asyncio.run(f())
no exception

I think that also `asyncio.sleep()` should raise `ValueError` if the argument is less than zero.

----------
components: asyncio
messages: 362314
nosy: Marco Sulla, asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: asyncio.sleep() does not adhere to time.sleep() behavior for negative numbers
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39698>
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