This is purely an IDE bug. I am getting ```Functio...

# intellij

[andylamax]

This is purely an IDE bug. I am getting

Function1<? super T, ? extends R> is not a functional interface

when passing a lambda argument that is written in common main. Any one else getting this? What version of IDEA are you all using? More on thread

[andylamax]

I have the following files

commonMain/Box.kt

class Box<out T>(val value: T) {
    fun <R> map(func: (T) -> R): Box<R> = Box(func(value))
    fun <R> flatMap(func: (T) -> Box<R>) = func(value)
}

jvmMain/Bag.kt

class Bag<out T>(val value: T) {
    fun <R> map(func: (T) -> R): Bag<R> = Bag(func(value))
    fun <R> flatMap(func: (T) -> Bag<R>): Bag<R> = func(value)
}

jvmTest/java

(new Bag(4)).map(it -> "String").flatMap(str -> new Bag(5)); // passes with no problems at all
(new Box(1)).map(it -> "String").flatMap(str -> new Box(4)); // Function1<? super T, ? extends R> is not a functional interface

[Alexey Belkov [JB]]

Can you please create a YouTrack issue with a sample project attached?