[issue37202] Future.cancelled is not set to true immediately after calling Future.cancel

[Roland Netzsch]

New submission from Roland Netzsch <stuxcrystal at gmail.com>:

The attached file produces the following output:

    wait is still running
    wait is not set to cancelled!
    Awaiting cancelled future produced a CancelledError.

A look a the documentation does not suggest a need to await the future in order to make sure the cancelled-flag is being set.

----------
components: asyncio
files: test.py
messages: 345029
nosy: Roland Netzsch, asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Future.cancelled is not set to true immediately after calling Future.cancel
type: behavior
versions: Python 3.7
Added file: https://bugs.python.org/file48405/test.py

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<https://bugs.python.org/issue37202>
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