Custom shape has zero width after instantiation

[ameotoko]

I have a class that extends Circle with minimal customisations. When Circle is added to canvas, it automatically has its width and height equal to double-radius. But when my subclass is added, it has width: 0 and height: 0. Can someone help me find out what affects this?

[ameotoko]

Never mind, I had a typo in the constructor of the subclass.