```interface Foo @Serializable data object Bar : ...

# serialization

[CLOVIS]

interface Foo

@Serializable
data object Bar : Foo
// Impossible to make this class serializable because its parent is not serializable and does not have exactly one constructor without parameters

I'm surprised this is forbidden. I would have expected it to serialize correctly as an empty JSON object.

[ephemient]

https://pl.kotl.in/ok6NDhoyB seems to work fine

[CLOVIS]

Ah. Maybe I've got old versions of dependencies? I'll try that.