Fix an error when DPM Solver Single Step contains duplicate timesteps

[cmdr2]

Uses the de-duplication logic applied to the other samplers in #2969

I think this sampler got missed?

This change fixes an error when duplicate timesteps are created with the karras flag: ValueError: only one element tensors can be converted to Python scalars

@patrickvonplaten @sayakpaul

Thanks!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint.

[cmdr2]

I'm really not sure how to fix the non-passing test. It seems to be due to the order_list, which causes the order to stay at 2 (instead of 1), which results in the sample not getting assigned to self.sample.

[patrickvonplaten]

I think this is related: #4187

Could you take a look @yiyixuxu ?

[yiyixuxu]

Thanks for your PR @cmdr2 :)

We are trying to see if we can move away from the de-duplicate logic altogether in this PR #4187

will keep you updated!

YiYi

[cmdr2]

Thanks @yiyixuxu! Sounds good, looks like a better path. I noticed the index_counter approach in DPM Solver SDE as well.

[github-actions]

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[cmdr2]

This error has not been resolved, and the other PR hasn't been merged either (it's been marked as stale).

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the contributing guidelines are likely to be ignored.

[yiyixuxu]

fixed in #4986