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mxx::comm.split with MPI_UNDEFINED #6

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tcpan opened this issue Mar 14, 2016 · 0 comments
Open

mxx::comm.split with MPI_UNDEFINED #6

tcpan opened this issue Mar 14, 2016 · 0 comments
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tcpan commented Mar 14, 2016

MPI_Comm_split with MPI_UNDEFINED as color would produce a subcommunicator == MPI_COMM_NULL.

currently, mxx::comm.split(color) when supplied with MPI_UNDEFINED does not appear to handle this case properly. Subsequent calls (even when logic is branched with "if (color == x)") results in an MPI error/exception.
@patflick patflick added the bug label Mar 16, 2016
@patflick patflick self-assigned this Mar 16, 2016
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