Protect against empty revision timestamps in VersionHistoryController::getRevisionDescription

somehow related?
https://www.drupal.org/project/drupal/issues/3439347 🐛 InvalidArgumentException: The timestamp must be numeric. in Drupal\Component\Datetime\DateTimePlus::createFromTimestamp() Postponed: needs info

No, that is in a different part of the codebase.

Pasting partially from 🐛 Core now allows moderation of taxonomy terms, but an error is thrown when trying to use scheduled transitions on this Closed: works as designed

I dont think we should be adding any defensiveness until something is decided for \Drupal\Core\Entity\RevisionLogInterface::getRevisionCreationTime.

There's no point in adding a NULL check if its illegal to return NULL. Violates static analysis, etc.

Somehow it is allowed to be non-int, by design: this doesnt make sense to me, as revisions should always have a create date.
Data is malformed, for example during a migration or bad update: a migration should be created to fix the data.
The interface maybe needs to be updated to return NULL.

I made an update to #3461602: Core now allows moderation of taxonomy terms, but an error is thrown when trying to use scheduled transitions on this

Everything works with new terms, but my existing terms have the error mentioned there.

I encountered the same problem in drupal 10.3.2. When I accessed the Revision list of a certain taxonomy/taxonomy/term/xxx/revisions, the page reported an error InvalidArgumentException: The timestamp must be numeric.
I created a patch and when the revision created time is empty, I display the changed time of the revision as link text.