Cannot split a team multiple times

[bertwesarg]

When splitting a team the second time I get the following runtime exception:

[    0 ERROR ] [ 12692 ] Team.cc                  :63   | dash::exception::InvalidArgument             | [ Unit 0 ] child of team 0 already set to 1, cannot set to 3
terminate called after throwing an instance of 'dash::exception::InvalidArgument'
  what():  [ Unit 0 ] child of team 0 already set to 1, cannot set to 3

Here is an example code:

#include <iostream>

#include <libdash.h>

int
main(int ac, char *av[])
{
    using TeamSpecT = dash::TeamSpec<2>;

    dash::init(&ac, &av);

    auto& team_all = dash::Team::All();

    dash::Team& team_1= team_all.split(2);

    team_all.barrier();
    dash::Team& team_2= team_all.split(2);

    dash::finalize();

    return 0;
}

Is this intentional?