Change the checkpoint code - #537
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torch.utils.checkpointis a module, not a function that can be called directly—the actual checkpoint function istorch.utils.checkpoint.checkpoint. The object wrapped bycheckpointshould be a “specific forward pass” (function + input), rather than simply replacing the entireself.incnn.Moduleobject—the checkpointing mechanism must know what the input is in order to recompute the forward pass during backpropagation.