it seems like inline classes don't always get boxe...

# compiler

[dimsuz]

it seems like inline classes don't always get boxed when used as generics (contrary to what docs say). Is this a bug or expected behavior?

inline class InlinePayload(val id: String)

fun <T> test(t: T): T {
  return t
}

val (p1, p2) = listOf(test(3))
  .zip(
    listOf(test(InlinePayload("a"))), // (1)
    ::Pair)
  .first()

println(p2.id) // (2) EXCEPTION!

It seems that (1) creates a List<String> rather than List<InlinePayload> and then (2) crashes with

class java.lang.String cannot be cast to class ru.example.app.InlinePayload (java.lang.String is in module java.base of loader 'bootstrap'; ru.example.app.InlinePayload is in unnamed module of loader 'app')

[dimsuz]

If I change

::Pair

to

{ p1, p2 -> p1 to InlinePayload(p2.id) }

i.e if I "rewrap" then no crash occurs

[Dominaezzz]

Rip, this looks youtrack worthy.

[dimsuz]

I thought so too, decided to ask just in case. Will report then!