[issue37994] Fix silencing all errors if an attribute lookup fails

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
keywords: +patch
pull_requests: +15298
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/15630

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37994>
_______________________________________