Backport the diagnostic logs for is_possible_guard crash

Let's backport this PR to diagnose the #32868 (moved) is_possible_guard crash:

• 0.3.5: https://github.com/torproject/tor/pull/1661

changed milestone to %Tor: 0.4.2.x-final

Trac:
Parent Ticket: #32868 (moved)

added 035-backport-maybe 040-backport-maybe 041-backport-maybe 042-backport BugSmashFund actualpoints::0.1 component::core tor/tor consider-backport-after-0432 consider-backport-if-needed crash milestone::Tor: 0.4.2.x-final owner::teor parent::32868 priority::medium regression severity::normal status::merge-ready type::task labels

Trac:
Status: assigned to merge_ready

We may only want to backport this change to 0.4.2, after it's been tested in 0.4.3.1-alpha.

Also, by the time it's been tested in master, 0.4.0 will be obsolete.

Trac:
Keywords: regression crash 035-backport, 040-backport, 041-backport deleted, 040-backport-maybe, regression crash 035-backport-maybe, 041-backport-maybe added

We want this ticket to get more testing, then we should review it again, and decide if it needs backporting.

Trac:
Keywords: consider-backport-after-0431 deleted, consider-backport-after-0432, consider-backport-if-needed added

added 48m of time spent

mentioned in issue #32868 (moved)

moved to tpo/core/tor#32961 (closed)