Update utils.py: fix nan

[MengAiDev]

What does this PR do?

• Update utils.py: fix nan
• Suggested in 7e230e5

@ArthurZucker @zucchini-nlp

[zucchini-nlp]

Not sure if we want to fix it here. Unless there is an overflow in model code. there should be non NaNs. @gante WDYT

[gante]

Hi @MengAiDev 👋 Thank you for opening this issue 🤗

Agreed with @zucchini-nlp. Before considering code changes, we need to understand the problem -- even if we end up merging your suggestion as-is :)

Questions:

1. Can you share a short stand-alone reproducer for the issue? If not (e.g. private model), can you share which operation introduces the nan?
2. Have you tried running generate with remove_invalid_values=True? (this removes nan in the logits)

[MengAiDev]

I see, but this is just I try to fix the circle ci's failed, and I actually don't have the way to propose it., Sorry.