Seg fault in fortran MPI_COMM_CREATE_GROUP, works with Open MPI and MPICH

I'm having a segmentation fault that I can not really understand in a simple code, that just:

• calls the MPI_INIT
• duplicates the global communicator, via MPI_COMM_DUP
• creates a group with half of processes of the global communicator, via MPI_COMM_GROUP
• finally from this group creates a new communicator via MPI_COMM_CREATE_GROUP

Specifically I use this last call, instead of just using MPI_COMM_CREATE, because it's only collective over the group of processes contained in group, while MPI_COMM_CREATE is collective over every process in COMM. The code is attached.

If instead of duplicating the COMM_WORLD, I directly create the group from the global communicator (commented line), everything works just fine.

The parallel debugger I'm using traces back the seg fault to a call to MPI_GROUP_TRANSLATE_RANKS, but, as far as I know, the MPI_COMM_DUP duplicates all the attributes of the copied communicator, ranks numbering included.

I am using the ifort version 18.0.5, but I also tried with the 17.0.4, and 19.0.2 with no better results.
On the contrary, using Open MPI and MPICH 3.3 this program is working jsut fine.