KtNameReferenceExpression(216,219): 'inc'
  KaInapplicableCallCandidate:
    candidate = KaSimpleFunctionCall:
      contextArgumentMapping = {}
      contextArguments = []
      dispatchReceiver = KaExplicitReceiverValue:
        expression = num
        isSafeNavigation = false
        type = kotlin.Int?
      extensionReceiver = null
      signature = KaFunctionSignature:
        receiverType = null
        returnType = kotlin.Int
        symbol = kotlin/Int.inc(<dispatch receiver>: kotlin.Int): kotlin.Int
        valueParameters = []
        contextParameters = []
        callableId = kotlin/Int.inc
      typeArgumentsMapping = {}
      valueArgumentMapping = {}
    diagnostic = ERROR<UNSAFE_CALL: Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type 'Int?'.>
    isInBestCandidates = true
