Core entity_get_controller gets a NULL controller class

I have drafted a CR here: https://www.drupal.org/node/3451532 →

Also moved the patch to the MR so that we are sure it is still green: https://git.drupalcode.org/project/drupal/-/pipelines/187106

Adding a tag for the final review.

I thought this one seemed familiar when I started reading :) I suppose both @poker10 and I have written parts of the patch (/MR) so perhaps neither of us should commit it.

However, I think this is okay to commit on the basis that the change is to more cleanly handle the situation where Drupal is going to fail to load a valid controller class anyway. We have tests (thank you!) to prove that the code does what we expect, and multiple reports that (earlier versions) of this change solved (/ mitigated) the originally reported problem.

Also, it's sufficiently long ago that I hardly remember writing the code so it's like reviewing someone else's patch anyway :)

Anyone with a site that hits this error still has some debugging to do to, but it's an improvement on hitting unhandled Fatal errors.

Automatically closed - issue fixed for 2 weeks with no activity.