[issue41386] Popen.wait does not account for negative return codes

[Nico]

Nico <nicofroehlich at icloud.com> added the comment:

I suggest implementing a singed conversation into _wait

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keywords: +patch
message_count: 1.0 -> 2.0
pull_requests: +20749
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/21607

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