fix for #7516

[a-recknagel]

Bugfix

Subject: Enable secure object inspection in autodoc'd modules.

Purpose

Inspecting objects in user modules can be risky if they raise errors in their __getattr__ implementations. One such case is the flask.request proxy which will complain about not being in a valid context if is accessed in any way and throws a RuntimeError.

Detail

I just wrapped the access in a catchall, since users can raise whatever Exception they want. Maybe BaseException/a bare except would be even better, but it seemed risky to include SystemExit.

Relates

#7516

[a-recknagel]

@tk0miya since you are familiar with this section of the code, can you review this fix to check if it is fine?

[tk0miya]

Thank you for your work. But we have similar implementation named safe_getattr(). So it would be better to use it instead of getattr(). Sorry, I forgot to use it...
Could you update this, please?

[tk0miya]

In addition, could you rebase this into 3.0.x branch? Then I'll merge this and release as 3.0.3.

[a-recknagel]

Closed in favor of #7520