I'm trying to parse a Json in a backthread on native using kotlinx.serializer, but it fails with InvalidMutability exception. it used to work just fine with kotlin 1.3.30 and serialization 10.0 but fails at 1.3.41/11.1. Do you guys know if anything important changed in serialization between these two versions?

Are you sure that your expected json from the server matches your Serializable class? Had an issue were I was expecting the wrong class for the request that I was doing

Everything works when I'm on main thread. It looks like serialization might be mutating something frozen

basic JSON parsing with

fun fetchBackground(url: String) {
    val backgroundWorker = Worker.start()
    val future = backgroundWorker.execute(TransferMode.SAFE, { url }) {
       try {
            jsonParser.parseJson(" {\"userId\":1,\"id\":1,\"title\":\"delectus aut autem\",\"completed\":false} ")
        } catch (e: SerializationException) {
            JsonPrimitive("<error: ${e.message}>")
        }
    }
    println(future.result.jsonObject["id"])
    backgroundWorker.requestTermination().result
}

seems to work. But parsing to data class may have issues, planned to be fixed in next release.

Yeah, I’m talking about parsing data classes with @serializable annotation. Is there any info on when next release can be expected?