IssueTracker

My app is crashing on release builds with the following error:

  Fatal Exception: o8.r0: Function 'requestLoad' (JVM signature: requestLoad(Ljava/lang/Integer;)V) not resolved in class zb.w: no members found
       at kotlin.reflect.jvm.internal.KDeclarationContainerImpl.findFunctionDescriptor(KDeclarationContainerImpl.java:131)
       at kotlin.reflect.jvm.internal.KFunctionImpl$descriptor$2.invoke(KFunctionImpl.java:57)
       at kotlin.reflect.jvm.internal.KFunctionImpl$descriptor$2.invoke(KFunctionImpl.java:56)
       at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:93)
       at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:32)
       at kotlin.reflect.jvm.internal.KFunctionImpl.getDescriptor(KFunctionImpl.kt:56)
       at kotlin.reflect.jvm.internal.KFunctionImpl.toString(KFunctionImpl.kt:186)
       at kotlin.jvm.internal.FunctionReference.toString(FunctionReference.java:130)
       at java.lang.String.valueOf(String.java:4092)
       at java.lang.StringBuilder.append(StringBuilder.java:179)
       at app.LazyListPaging$Snapshot.toString(LazyListPaging.kt:19)
       at java.lang.String.valueOf(String.java:4092)
       at java.lang.StringBuilder.append(StringBuilder.java:179)
...

Example code:

class LazyListPaging {
  val snapshot = Snapshot(emptyList(), ::requestLoad)

  // This function is removed
  private fun requestLoad(index: Int?) {
     // ....
  }
}

data class Snapshot<S>(
        private val backingList: List<S>,
        private val onLoad: (Int?) -> Unit,
    ) : List<S> by backingList {
}

In the stacktrace, it seems that a call to the .toString() function of the Snapshot data class tries to describe the onLoad function property, which is a reference to the LazyListPaging.requestLoad() function that was thrown out.