larroy removed a comment on issue #14992: [MXNET-978] Support higher order gradient for `log`. URL: https://github.com/apache/incubator-mxnet/pull/14992#issuecomment-496750425 "I believe it would be better to have gradients defined for existing backward, instead of a differentiable gradient (relying on autograd machinery) at least on ops where backward is not trivial. It will allow to use existing optimised fused kernels and make sure there is no regression in the backward." I think you are right, we have discussed this before. I think we rushed merging this PR. We should do a check for regressions.
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