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MPI_Neighbor_alltoall{v,w}_init: correctly handle NULL parameters #12614

Closed ggouaillardet closed 3 weeks ago

ggouaillardet commented 3 weeks ago

Thanks Junchao Zhang for the report.

Refs. open-mpi/ompi#12037

Signed-off-by: Gilles Gouaillardet gilles@rist.or.jp (cherry picked from commit 01ec480cb19e65c3ac8cea0b0f9a7fd383f1095b)