The below fails to compile.

However "b" is a class var. The fact that it is reached via a normal field, does not change that. The address/value of TBar.f.b can be known without on instance of TBar required.

Mind, this is a theoretical question, I don't actually need it, just came across the idea and wanted to know.

program Project1;
type
   TFoo = object
     a: integer;
     class var b: integer;
   end;

  TBar = class
    f: TFoo;
    class property fb: integer read f.b;   // Error: Illegal symbol for property access
  end;

begin
end.