Still reachable memory reported by Valgrind

[q-posev]

Valgrind sometimes reports still reachable 1,864 bytes in 3 blocks on programs using the TREXIO_HDF5 back end. In fact, even a simple open+close program using only HDF5 library (see below) can be used to debug it

 #include "hdf5.h"
 int main(void){
         hid_t file = H5Fcreate("test.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
         herr_t status = H5Fclose(file);
         return 0;
 }

This is the HDF5-related issue (see this discussion on the HDF5 forum). Recompiling the HDF5 library with --enable-using-memchecker configure option should fix it.