[New-bugs-announce] [issue34313] IDLE crashes with Tk-related error on macOS with ActiveTcl 8.6

[Tal Einat]

New submission from Tal Einat <taleinat at gmail.com>:

On macOS 10.13.5 (the latest available) with ActiveTcl 8.6.7 (the latest available), I'm building Python from latest master (to be 3.8.0).  I'm consistently having IDLE crash almost immediately, just by opening any file for editing.  The crash results in the following error:

$ root/bin/python3 -m idlelib
objc[50759]: Invalid or prematurely-freed autorelease pool 0x7fb74091f050.
[1]    50759 abort      root/bin/python3 -m idlelib

In issue34120, @vtudorache reported a similar issue (also on macOS).

With Python 3.7.0 from python.org, everything works fine.

Strangely, replacing ActiveTcl with version 8.5.18.0 resolves this issue.

I'm not sure whether this is specific to IDLE; I'll try to provide a minimal way to reproduce.

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assignee: terry.reedy
components: IDLE, Tkinter
messages: 322888
nosy: gpolo, serhiy.storchaka, taleinat, terry.reedy, vtudorache
priority: normal
severity: normal
status: open
title: IDLE crashes with Tk-related error on macOS with ActiveTcl 8.6
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34313>
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