MPI_Attr_get problem.
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@nselliott is already working on this.
Since Oct 15, 2018.
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Description
I was using SGI MPI and MPI_Attr_get cannot retrive MPI_TAG_UB for communicator except MPI_COMM_WORLD, as documented in BergerRigoutsos.C:967.
The if statement at Line 978, 987 is to ensure that attribute MPI_TAG_UB has been obtained. However SGI MPI will not set the attribute pointer (tag_upper_bound_ptr) to NULL if the attribute is not obtained.
We should check flag != 0
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