LIAFNode forward fails with missing single_step_cupy_fp32_inference attribute

[GraceDyer]

Issue type

• Bug Report
• Feature Request
• Help wanted
• Other

SpikingJelly version

0.0.0.0.14

Description

I encountered a reproducible issue where LIAFNode fails during forward execution with a missing attribute error.

This appears to affect normal forward usage rather than a corner-case export or serialization workflow.

Observed error:

AttributeError: 'LIAFNode' object has no attribute 'single_step_cupy_fp32_inference'

This behavior was reproducible across repeated reruns in my validation.

Minimal code to reproduce the error/bug

import torch
from spikingjelly.activation_based import neuron

x = torch.randn(2, 4)
node = neuron.LIAFNode()

node(x)

Expected behavior

LIAFNode should complete the forward pass successfully, or fail with a clearly documented limitation if additional setup is required.

Environment

• torch: 2.8.0
• spikingjelly: 0.0.0.0.14
• python: 3.10

Additional notes

This issue matters because it breaks the normal forward path for LIAFNode.

If this attribute is expected to be initialized only under certain conditions, an explicit validation check or clearer documentation would still be very helpful.

[xyaz1313]

Hey, I'd like to look into this. I have experience with PyTorch and neural network frameworks. The missing attribute error on LIAFNode's forward pass is likely a version mismatch or import issue. Happy to dig in and find the root cause.

[GraceDyer]

Thanks for taking a look.

We did some additional verification on our side, and it now looks less like an import mismatch and more like an implementation issue in spikingjelly==0.0.0.0.14.

In particular, we reproduced the same error in a clean environment, and the installed activation_based/neuron.py appears to access self.single_step_cupy_fp32_inference inside LIAFNode.__init__, but that attribute does not seem to be initialized on this code path.

We also compared against spikingjelly==0.0.0.0.12, where this access does not appear in LIAFNode.