Toothpick provider discovery

ToothpickQuestion2.kt

package bfreuden

import toothpick.InjectConstructor
import toothpick.ProvidesSingleton
import toothpick.ktp.KTP
import toothpick.ktp.binding.bind
import toothpick.ktp.binding.module
import javax.inject.*


data class Config(val props: Map<String, String>)

@ProvidesSingleton
@Named("appConfig")
@Singleton // removing it causes kapt failure (java.lang.reflect.InvocationTargetException (no error message))
@InjectConstructor
class MyAppConfigProvider: Provider<Config> {
    override fun get() = Config(mapOf("dpPort" to "12"))
}

@InjectConstructor
class MyApp(@Named("appConfig") val config: Config)

fun main() {
    val app = KTP.openRootScope()
        .installModules(
            module {
                // does not work without the binding below
                // error: No binding was defined for class testserver.Config and name appConfig in scope class toothpick.Toothpick and its parents []
                bind<Config>().withName("appConfig").toProvider(MyAppConfigProvider::class)
            }
        )
        .getInstance(MyApp::class.java)
    println(app.config)

}