[issue42508] macOS IDLE with Tk 8.6.10 in 3.9.1rc1 universal2 installer fails smoke test

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

This issue exposed and is affected by an existing system and version independent bug.  With that fixed as in PR 23570, running a file with "print('output')" with the new 3.9.1rc1 universal binary results in the following.

output
========= RESTART: /Users/.../tem1.py =========
<'... finished.' dialog box>
<click OK and box reappears>
<click again and>
========== RESTART: Shell =====================
>>>
output
>>>

The normal output is

========= RESTART: /Users/.../tem1.py =========
output
>>>

I am investigating how 'RESTART' is being printed after 'output', even though the restart function is called before the compiled tem1 is sent to be executed.

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stage: patch review -> 

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42508>
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