Hi. This is a simplified version of the issue I have. I've got this in an Android project

class A(){
   val flow: Flow<Boolean> = flowOf(true)
}

class B (a: A) {
   val otherFlow = a.flow
}

and in one test:

@RelaxedMockK //or MockK, I've tried both
    protected lateinit var a: A
    
    protected lateinit var b: B
    
    @Before
    fun setUp() {
        MockKAnnotations.init(this, relaxed = true)
        b = B(a)
    }

This is working fine with MockK

1.13.3

, but after updating to

1.13.4

I'm getting the error

java.lang.IncompatibleClassChangeError: Superclass kotlinx.coroutines.flow.Flow of kotlinx.coroutines.flow.Flow_1_Proxy is an interface (declaration of 'kotlinx.coroutines.flow.Flow_1_Proxy' appears in /data/user/0/com.mypackage.myapp.debug/app_dxmaker_cache/Generated_2115397682.jar)

Am I missing something? 🤷 🤔

We have a similar issue on our side. Also downgraded to

1.13.3

for the time being. Will check again later if it is the exact same issue.

no idea off the top of my head, let me investigate

1.8.10

atm

weird can you do a test with 1.8.0?

yes - give me a second