2e2366d193
As reported at https://stackoverflow.com/questions/52707242/mpirun-segmentation-fault-whenever-i-use-a-hostfile mpirun crashes when the hostfile contains a "user@host" line. The root cause is username was not strdup'ed and free'd twice by opal_argv_free() and free() Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp> (cherry picked from commit open-mpi/ompi@5803385d44)