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Pak Lui 54c87daaed Fix a SEGV when the user updates the message queue graph after the user
executable has called MPI_Finalize(). It happens when removing the group
from each of the communicators, that MPI_COMM_NULL doesn't have a group. 
Also fix the code from skipping over every other communicator when
freeing the groups.

This commit was SVN r16166.
2007-09-20 18:58:16 +00:00
..
2006-10-06 14:52:44 +00:00
2007-09-06 14:56:08 +00:00