<@U0HUJ25V1> The only thing I can think of that wo...

# tornadofx

[edvin]

@thomasnield The only thing I can think of that would give this error is if you create a Field().apply { ..} manually like this, and the parent is not a fieldset. Then you might trigger the val fieldset: Fieldset get() = parent as Fieldset property of the Field. If you use the builders however, that can really never happen, since the builder for field is a function inside Fieldset.