Basic pack job step running in separate MPI_COMM_WORLDs
$ srun --pack-group=1,2 -l tmp 0: JOBID:43740 HOST:nid00002 0: JOBID:43741 HOST:nid00003 1: JOBID:43741 HOST:nid00003 1: JOBID:43740 HOST:nid00002 2: JOBID:43740 HOST:nid00002 2: JOBID:43741 HOST:nid00003 3: JOBID:43741 HOST:nid00003 srun: error: Task 0 reported exit for a second time. srun: error: Task 1 reported exit for a second time. srun: error: Task 2 reported exit for a second time.
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