So apparently, I can't anymore use

var

in an object.. What can I do about it? (language version 1.5.10 and only in within the multiplatform module)

https://play.kotlinlang.org/hands-on/Kotlin%20Native%20Concurrency/03_Global Kotlin/Native's memory model always has been

So I have to add a

@ThreadLocal

or have to use a class?

You could also use an

AtomicReference

.