On Mon, Oct 14, 2013 at 09:54:56PM -0500, Rob Latham wrote:

good news is that I think everything "important" is happening correctly. It's just that when the status object is updated it's picking up an overflowed integer. status.count is MPI_Count big, so that's not the source of the overflow. will look once more at my mountain of clang -Wshorten-64-to-32 related warnings in the morning.

Jeff found the casts to int and I've added his two patches to my branch in -review. Jeff and I now pass Jeff's testcase. ==rob -- Rob Latham Mathematics and Computer Science Division Argonne National Lab, IL USA