H5Ovisit2 change of behavior between 1.10.11 and v1.14.4.3

[abhibaruah]

Platform (please complete the following information)

• HDF5 version - 1.14.4.3
• OS and version - Debian 12
• Compiler and version - gcc

I noticed that there is a change of behavior in H5Ovisit2 between HDF5 versions 1.10.11 and 1.14.4.3.
I wanted to check if this is intended behavior, or a bug introduced in any of the versions after 1.10.11.

I also see the same behavior with H5Ovisit_by_name2.
We are also compiling the application with the compatibility flag “-DH5_USE_18_API” to preserve 1.8 function mapping.
I have created a simplified reproduction of the tests on our end and am attaching it. The h5 file I used for the repro can be found here.

Output from 1.10.11:
H5Ovisit_func
.
144115188075855873
H5Ovisit_func
g1
144115188075855873
H5Ovisit_func
g1/g2
144115188075855873
H5Ovisit_func
g1/g2/myDataset
144115188075855873
Status: 0

Output from 1.14.4.3
H5Ovisit_func
.
144115188075855873
Status: 0

Even though the H5Ovisit2 documentation mentions it is “a recursive iteration function to visit the object obj_id and, if obj_id is a group, all objects in and below it in an HDF5 file,…”, for 1.14.4.3, it seems like the function visits only the root group and not all the nested groups.

#include "hdf5.h"
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include "string.h"

#define FILE1           "testfile.h5"

herr_t H5Ovisit_func(hid_t obj_id, const char* name, const H5O_info_t *info, void* opdata) {
    std::cout << "H5Ovisit_func" << std::endl;
    std::cout << name << std::endl;

    std::cout << obj_id << std::endl;
    return (0);
}

int main() {
  hid_t           file_id;    /* Handles */
  herr_t          status;
  

  /*
    * Create a new file using the default properties.
    */
  file_id = H5Fopen(FILE1, H5F_ACC_RDONLY, H5P_DEFAULT);

// Open root object
  hid_t obj_id = H5Oopen(file_id, "/", H5P_DEFAULT);

  // Visit root
  H5_index_t idx_type = H5_INDEX_NAME;
  H5_iter_order_t order = H5_ITER_DEC;
  void* opdata = (void*)0;
  unsigned fields = H5O_INFO_META_SIZE;

  // Visit the root group
  status = H5Ovisit2(obj_id, idx_type, order, H5Ovisit_func, opdata, fields);
  std::cout << "Status: " << status << std::endl;



  // Close objects
  H5Oclose(obj_id);
  status = H5Fclose(file_id);

	return 0;
}