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Gilles Gouaillardet 2e2366d193 util/hostfile: fix a double free error
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)
2018-10-09 13:06:55 +09:00
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