[issue39873] Debug mode: check if objects are valid

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

This change was mostly an experimentation. But I'm not sure that it does solve any issue. The change is more intrusive than what I expected. I prefer to abandon PR 18803 and this issue.

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resolution:  -> rejected
stage: patch review -> resolved
status: open -> closed

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<https://bugs.python.org/issue39873>
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