LaunchWithDispatcherCrash.kt

button.setOnClickListener{
    launch(Dispatcher.Main) {
        textView.text = "Downloading file" // Runs on main thread
        suspendCoroutineUninterceptedOrReturn<Unit> { cont ->
            thread {
                downloader.download("http://example.com/file.txt") // Runs on Background thread
                cont.resumeWith(Result.success(Unit))
            }
            COROUTINE_SUSPENDED
        }
        textView.text = "Download Complete" // CRASH! Runs on Background thread
    }
}