DependencyCRF partition function broken

[teffland]

Getting the following in-place operation error when using the DependencyCRF:

B,N = 3,50
phi = torch.randn(B,N,N)
DependencyCRF(phi).partition

/usr/local/lib/python3.7/dist-packages/torch_struct/deptree.py in _check_potentials(self, arc_scores, lengths)
    121         arc_scores = semiring.convert(arc_scores)
    122         for b in range(batch):
--> 123             semiring.zero_(arc_scores[:, b, lengths[b] + 1 :, :])
    124             semiring.zero_(arc_scores[:, b, :, lengths[b] + 1 :])
    125 

/usr/local/lib/python3.7/dist-packages/torch_struct/semirings/semirings.py in zero_(xs)
    124     @staticmethod
    125     def zero_(xs):
--> 126         return xs.fill_(-1e5)
    127 
    128     @staticmethod

RuntimeError: a view of a leaf Variable that requires grad is being used in an in-place operation.

[srush]

Interesting. Can I ask which torch version you are using? This is not failing on my side.

[srush]

Oh nvm. I see that it is failing in the latest pytorch version. I will see what changed.

[srush]

Fix coming in #105