I am currently trying to add a “Page List” block and am handed one “Undefined Property” after another. This happened in other places as well, not just blocks. An example:
Undefined property: Concrete\Block\PageList\Controller::$displaySystemPages
I can easily fix it with appropriate isset() or property_exists() lines in the code. But I assume that with some update in the future my edits will disappear again. As an encouragement for the devs: please declare all object properties before accessing them.
And in the end: is there a more appropriate place to post such messages?