No "kotlin.ExtensionFunctionType" annotation on functional types with receivers

[popovanton0]

When you have a KSType that represents a functional type with a receiver (e.g. String.() -> Unit), and you are trying to get the list of all annotations of the type, there is no @kotlin.ExtensionFunctionType. But, functionalType.toString() call returns this:

"[@kotlin.ExtensionFunctionType] Function1<String, Unit>"

In the debugger, I see this:

Somehow, this annotation is omitted by ksp.

However, without it seems impossible to determine, whether any functional type has a receiver or not.
Maybe there is another way?

I created a branch in my repo that reproduces this behaviour. To reproduce, run this unit test. Input to the test is here. Code of the processor is here.