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kotlinlang

I noticed I get an error `Expected a class body` if I do this. Is this intended?

```open class Test
val test = object : Test()
```
It seems to want an empty body afterwards.

Well, at least it is either an implementation bug or specification bug I'd say.
<https://kotlinlang.org/spec/expressions.html#object-literals> - if I don't get it wrong - allows to have no body.
But the examples and implementation enforce one.

From a quick look I'd say even the provided antlr grammer would allow having no body

Allowing no body would be consistent with the other aspects of the language. Interesting.

After some thought, I think it's a spec error. 

```val test = object : Test() {}
```
is effectively equivalent to
```val test = Test()
```
So why use an anonymous object at all if you're not going to give it body? I think that's the idea.

Or if `Test` is abstract but does not have abstract members

Ah, yeah. That is a more compelling case than what I originally wrote.