[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 in fixed_cross_entropy.

Skipped:

• Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251: Competing near-duplicate; merge on top of Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254 conflicted in src/transformers/loss/loss_utils.py and added no substantive behavior beyond the merged fix.

Failed:

• None.

Notes:

• Cluster contained issue kwargs are not passed to loss calculation function. huggingface/transformers#43240 and PRs Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 and Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254.
• Issue kwargs are not passed to loss calculation function. huggingface/transformers#43240 is closed by stale automation, not by an integrated fix; origin/main still lacked weight/label_smoothing passthrough before the local merge.
• pr-search-cli code similarity showed Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 and Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254 are highly overlapping implementations touching the same hunk in src/transformers/loss/loss_utils.py.
• Local merge of Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 was attempted after merging Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254, produced a same-hunk content conflict, and was aborted cleanly.
• Final branch diff versus origin/main changes only src/transformers/loss/loss_utils.py.
• Validated resulting file with python -m py_compile src/transformers/loss/loss_utils.py.

Next steps:

• Review the local merge commit for Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254 on this branch.
• Optionally run make style and targeted loss-related tests in a torch-enabled environment.
• Treat Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 as superseded unless maintainers explicitly prefer its kwargs naming/style.

AI assistance was used for this branch preparation.