Use full backward hook for compatibility with torch >= 1.8.0. #1927
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Since torch version 1.8.0 using
register_backward_hook
is deprecated.On adding gradient handles in
PyTorchDeep
using torch 1.8.0, we get the following warning:Using a non-full backward hook when the forward contains multiple autograd Nodes is deprecated and will be removed in future versions. This hook will be missing some grad_input. Please use register_full_backward_hook to get the documented behavior.