calling dgetrf: val=0xe86f80, ipiv=0xe872b0, work=0xe872e0
after dgetrf: val=0xe86f80, ipiv=0xe872b0, work=0xe872e0
after dgetri workspace query:
 val=0xe86f80, ipiv=0xe872b0, work=0xe872e0
dgetri: workspace = 640
before 'real' dgetri call:
 val=0xe86f80, ipiv=0xe872b0, work=0xe872e0
Segmentation fault (core dumped)