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Both invocations are marked as ambiguous, which I find very weird.

I am guessing the block in q2 can also be typed as `() -&gt; Unit`?

Mmh, I guess. Doesn't explain why the first one is ambiguous though.

if you decompile
```val a: ()-&gt;String = {""}
val b: ()-&gt;Unit = {}```
then both have the same type `Function0`

still doesn’t fully explain the issue

Yeah, that's a jvm for you, but at compile time it should be know which one to call.

It marks both casts as useless, yet removing them makes the file uncompilable again.

Are you using new type inference engine? If yes then you can check with the old one and the  other way around

This works, I feel like it's bug reporting time. *sighs*

<https://kotl.in/issue> :slightly_smiling_face:

<https://youtrack.jetbrains.com/issue/KT-11265>

Ug, why can't I ever find the correct bugreport