java.lang.IllegalStateException: unhandled visibility: private/*private to this*/

[bcorso]

Dagger just released it's KSP processors and a user has hit this exception:

exception: error: [ksp] java.lang.IllegalStateException: unhandled visibility: private/*private to this*/
exception:     at com.google.devtools.ksp.DescriptorUtilsKt.toKSModifiers(DescriptorUtils.kt:96)

Which points to this line:

https://github.com/google/ksp/blob/main/common-util/src/main/kotlin/com/google/devtools/ksp/DescriptorUtils.kt#L96

The Dagger Github issue (google/dagger#4045) gives some snippets of the class that caused this but I'm still not sure what exactly in the class could be responsible.

[kakai248]

Just to add some more information, it seems to be related with having in in generic P and then using it in paramState.

This compiles:

interface SubjectInteractor<in P : Any?, R : Any?> {
    val flow: Flow<R>
    suspend operator fun invoke(params: P)

-    abstract class Default<in P : Any?, R : Any?> : SubjectInteractor<P, R> {
+    abstract class Default<P : Any?, R : Any?> : SubjectInteractor<P, R> {
        private val paramState = MutableSharedFlow<P>(
            replay = 1,
            extraBufferCapacity = 0,
            onBufferOverflow = BufferOverflow.DROP_OLDEST
        )

        @OptIn(ExperimentalCoroutinesApi::class)
        override val flow: Flow<R> = paramState
            .distinctUntilChanged()
            .flatMapLatest(::createFlow)
            .distinctUntilChanged()

        override suspend operator fun invoke(params: P) {
            paramState.emit(params)
        }

        protected abstract fun createFlow(params: P): Flow<R>
    }
}

[nesk]

Just happened to me when trying to resolve the visibility of kotlin.collections.AbstractMap::_values:

class CustomProcessor : SymbolProcessor {
    override fun process(resolver: Resolver): List<KSAnnotated> {
        resolver.getClassDeclarationByName("kotlin.collections.AbstractMap")
            ?.getAllProperties()
            ?.single { it.simpleName.asString() == "_values" }
            ?.getVisibility()
        //    ^ java.lang.IllegalStateException: unhandled visibility: private/*private to this*/
    }
}

[technoir42]

I get this error in incremental builds, but a follow-up build with --rerun-tasks always passes.