27b8430e8f
MPI-2:6.3.4 says about reduction operations * Have the point-to-point one-sided component spew a warning and return an error if a non-predefined datatype is used with an MPI_OP other than MPI_REPLACE. Yes, this violates the MPI standard, but it's the best we can do until George and I implement support for figuring out where all the locations to update are.. This commit was SVN r9134.