Registering a multidimensional sequence of structs causes an exception

[PFrieling]

Hello,

I am migrating from Fast-DDS 2.14.3 & Fast-DDS-Gen 3.3.1 to Fast-DDS 3.2.1 & Fast-DDS-Gen 4.1.0. I discovered that all my message types that contain multidimensional sequences of structs will throw a Inconsistency between given header and element_identifier parameters exception when register_type is called.

The issue only occurs if the multidimensional sequence does hold custom structs. In the following example, registering DummyA will work, registering DummyB will raise an exception:

Dummy.idl

struct Point2D
{
    double x;
    double y;
};

struct DummyA
{
    sequence< sequence< double > > points;
};

struct DummyB
{
    sequence< sequence< Point2D> > points;
};

This is my test code:

main.cpp

#include <fastdds/dds/topic/TypeSupport.hpp>
#include <fastdds/dds/domain/DomainParticipant.hpp>
#include <fastdds/dds/domain/DomainParticipantFactory.hpp>

#include "DummyPubSubTypes.hpp"

#include <iostream>

int main(int argc, char** argv)
{
    auto factory     = eprosima::fastdds::dds::DomainParticipantFactory::get_instance();
    auto participant = factory->create_participant_with_default_profile(nullptr, eprosima::fastdds::dds::StatusMask::none());
    if (participant == nullptr)
    {
        std::cerr << "Failed to create participant" << std::endl;
        return -1;
    }

    eprosima::fastdds::dds::TypeSupport typeA(new DummyAPubSubType());
    eprosima::fastdds::dds::TypeSupport typeB(new DummyBPubSubType());
    try
    {
        typeA.register_type(participant);
        std::cout << "Msg type a registered" << std::endl;
        typeB.register_type(participant);
        std::cout << "Msg type b registered" << std::endl;
    }
    catch (const std::exception& e)
    {
        std::cerr << "Failed to register type: " << e.what() << std::endl;
        return -2;
    }
    return 0;
}

The output log shows that the multidimensional double sequence worked, but the multidimensional Point2D sequence does not:

Msg type a registered
Failed to register type: Inconsistency between given header and element_identifier parameters

[PFrieling]

The issue does still occur using Fast-DDS 3.4.0 and Fast-DDS-Gen 4.2.0