Handles the result for Remote Procedure Calls:

            rpc_result#f35c6d01 req_msg_id:long result:bytes = RpcResult;

        This is where the future results for sent requests are set.

async def _handle_rpc_result(self, message):
        """
        Handles the result for Remote Procedure Calls:

            rpc_result#f35c6d01 req_msg_id:long result:bytes = RpcResult;

        This is where the future results for sent requests are set.
        """
        rpc_result = message.obj
        state = self._pending_state.pop(rpc_result.req_msg_id, None)
        self._log.debug('Handling RPC result for message %d',
                      rpc_result.req_msg_id)

        if not state:
            # TODO We should not get responses to things we never sent
            # However receiving a File() with empty bytes is "common".
            # See #658, #759 and #958. They seem to happen in a container
            # which contain the real response right after.
            try:
                with BinaryReader(rpc_result.body) as reader:
                    if not isinstance(reader.tgread_object(), upload.File):
                        raise ValueError('Not an upload.File')
            except (TypeNotFoundError, ValueError):
                self._log.info('Received response without parent request: {}'
                               .format(rpc_result.body))
            return

        if rpc_result.error:
            error = rpc_message_to_error(rpc_result.error, state.request)
            self._send_queue.append(
                RequestState(MsgsAck([state.msg_id]), loop=self._loop))

            if not state.future.cancelled():
                state.future.set_exception(error)
        else:
            with BinaryReader(rpc_result.body) as reader:
                result = state.request.read_result(reader)

            if not state.future.cancelled():
                state.future.set_result(result)