Hi all, trying to use koin on the native side, and...

# koin

[xxfast]

Hi all, trying to use koin on the native side, and i’m running into this

Thread 1: EXC_BAD_ACCESS (code=1, address=0x10)

with very little output from the console as to why. Its pointing to this

App`kfun:org.koin.core.module.Module#<get-mappings>(){}kotlin.collections.HashMap<kotlin.String,org.koin.core.instance.InstanceFactory<*>>:

Has anyone encountered this before?

[xxfast]

Okay after sometime, i think i found the issue, and this is a weird one - so bear with me 🐻.

I have two modules :login and :app.

:app has this file AppModules.kt

val appModules: List<Module> = listOf(
  .. 
  loginViewModelsModule,
  appViewModelsModule,
)

where, loginViewModelsModule is defined in :login commonMain as an

expect val loginViewModelsModule: Module

and appViewModelsModule is defined in :app commonMain as

expect val appViewModelsModule: Module

In order to debug the above runtime crash, i commented out appViewModelsModule like

val appModules: List<Module> = listOf(
  .. 
  loginViewModelsModule,
  // appViewModelsModule,
)

which worked, so I thought its something to do with how i defined this particular module. So i made the module empty in iosMain

actual val appViewModelsModule: Module = module { }

but even then it was still crashing with the same ambiguous error.

This was pretty much a road-block - so then I decided to define the module on the same file in AppModules.kt then it dawned on me

expect val appViewModelsModule: Module 

val appModules: List<Module> = listOf(
  .. 
  loginViewModelsModule,
  appViewModelsModule, // Compilation error, variable must be initialised
)

Looks like kotlin compiler is okay with expect top level members from external modules being not initialised, but somehow not okay with the expect top level members from within the same module.

Am i going crazy, or doesn’t this sound like a kotlin-compiler bug 🤔?

[xxfast]

apparently, the solution was just to use a delegate in the iosMain

actual val appViewModelsModules: Module get() =
  module {
    single { MainViewModel() }
    single { RootViewModel() }
  }

and that worked just fine