Override Mode now throws an error with PHP's deprecation of dynamic properties on classes.
Deprecated function: Creation of dynamic property Drupal\Core\Template\Attribute::$#override_mode_breadcrumb is deprecated in Drupal\component_library\OverrideMode->traverse()
Override mode will still function without this, we just lose previews when changes are made. I think a better UX is Plus Suite since it is a true WYSIWYG and the template editing will always be in context, so there's no need to save the render array. A template editing tool would be easier there.
1.0
Code
Issue #3501810 by tim bozeman: Override mode's render array memory is...
Automatically closed - issue fixed for 2 weeks with no activity.