GB0138

Graph-Break Type

Short name describing what triggered the graph break

Unsupported autograd.Function context save_for_backward

Values or code snippet captured at the break point

call_method {self} {name}

Explanation of why the graph break was triggered

Dynamo requires the saved_tensors attribute to be initialized on the autograd.Function context object.

Hints on how to resolve the graph break

Ensure that the saved_tensors attribute is properly
initialized before calling save_for_backward.
save_for_backward only supported on a newly constructed torch.autograd.function.FunctionCtx.