New submission from Jonathan Crall <[email protected]>:
I first noticed this when testing xdoctest on Python 3.9, and then again when
using IPython.
I was finally able to generate a minimal working example in Python itself. The
following code:
python -c "print(eval(compile('[i for i in range(3)]', mode='eval',
filename='foo', flags=221184)))"
produces
[0, 1, 2]
in Python <= 3.8, but in 3.9 it produces:
<coroutine object <module> at 0x7fa336d40ec0>
<string>:1: RuntimeWarning: coroutine '<module>' was never awaited
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
Is this an intended change? I can't find any notes in the CHANGELOG that seem
to correspond to it.
----------
components: Interpreter Core
messages: 367651
nosy: Jonathan Crall
priority: normal
severity: normal
status: open
title: Python 3.9 eval on list comprehension sometimes returns coroutines
versions: Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue40438>
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