unfolded SVD segfaults

[Ken Arnold]

cnet3_tensor.svd()
Unfolding along dimension 0
SOLVING THE [A^TA] EIGENPROBLEM
NO. OF ROWS = 9702
NO. OF COLUMNS = 62551
NO. OF NON-ZERO VALUES = 232318
MATRIX DENSITY = 0.04%
MAX. NO. OF LANCZOS STEPS = 9702
MAX. NO. OF EIGENPAIRS = 50
LEFT END OF THE INTERVAL = -1.00E-30
RIGHT END OF THE INTERVAL = 1.00E-30
KAPPA = 1.00E-06

TRANSPOSING THE MATRIX FOR SPEED
Segmentation fault (core dumped)

Problem is almost definitely in the matrix-packing code.