I'm trying to use the Workers API but getting a "Memory leaks found" as soon as I try to pass worker arguments:

C:\Users\w64vm\kotlin-native\runtime\src\main\cpp\Memory.cpp:751: runtime assert: Memory leaks found

No args, no errors:

data class WorkerArgs(val unused: Unit = Unit)
val worker = startWorker()
val future = worker.schedule(
        TransferMode.CHECKED,
        { },
        { }
)
future.consume { _ -> }
worker.requestTermination().consume { _ ->  }

With args, prints error:

data class WorkerArgs(val unused: Unit = Unit)
val worker = startWorker()
val future = worker.schedule(
        TransferMode.CHECKED,
        { WorkerArgs() }, // <-- this line
        { }
)
future.consume { _ -> }
worker.requestTermination().consume { _ ->  }

Do I need to manually dispose the WorkerArgs instance somehow?

nope, this is just a bug that slipped into v0.3.1, we will release v0.3.2. to fix this problem in couple days