[issue37069] regrtest: log unraisable exceptions and uncaught thread exceptions

[STINNER Victor]

Change by STINNER Victor <vstinner at redhat.com>:


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keywords: +patch
pull_requests: +13644
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/13759

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37069>
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