Hessian raises assert *.flags.c_contiguous after upgrading 1.7.6 → 1.8.0

[jevandezande]

DFT Hessian calculations that pass on 1.7.6 fail on 1.8.0 with contiguity assertions. Happens for both closed- and open-shell calculations.

[sunqm]

Could you provide an example system?

[jevandezande]

This appears to be related to cupy 14. It was falling back to cupy.einsum due to a cuTENSOR import failure, and then failing the contiguity asserts. Rolling our stack back to a cupy-cuda12x==13.4.1 fixed the issue.