Thanks a lot for the small test case! We can reproduce the problem with it. I get same result as yours.
But the result may be expected if we consider the fact of the routinetakethe sparse matrix as square matrices by default.(Thisinfo seems be missed mkldocumentation. I will ask ourdoc developer to add such claim.).
For example, the parameter m INTEGER. Dimension of the matrix A.We give it 4 as input,
as a result, it thought the sparse matrix is 4x4.Thus, theresult matrix should be
11 ** *
1314 * *
*15 * *