[Auto] Support weight and label_smoothing in fixed_cross_entropy (cluster-43240-3): merged 1 of 2 PRs

[evalstate]

Cluster: cluster-43240-3

Merged:

• Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254 - Merged cleanly; focused fix adds explicit weight and label_smoothing passthrough to fixed_cross_entropy.

Skipped:

• None.

Failed:

• Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 - Conflicted with merged PR 43254 in src/transformers/loss/loss_utils.py; overlapping alternative implementation with kwargs vs _kwargs difference.

Notes:

• Issue kwargs are not passed to loss calculation function. huggingface/transformers#43240 is closed by stale automation, not by an integrating fix.
• Current main still lacked weight/label_smoothing passthrough in fixed_cross_entropy before merging PR 43254 locally.
• PRs considered in the cluster: 43251 and 43254.
• Merge of PR 43251 was aborted cleanly after conflict.

Next steps:

• Review the local merge commit for PR 43254.
• Optionally run targeted tests for loss_utils behavior in an environment with torch installed.
• Treat PR 43251 as a duplicate/competing alternative unless a maintainer specifically prefers its approach.