[Auto] Forward cross_entropy kwargs in fixed_cross_entropy (cluster-43240-3): merged 1 of 2 PRs

[evalstate]

Cluster merge run for cluster-43240-3.

Merged PRs:

• Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251: Merged cleanly; forwards weight and label_smoothing through fixed_cross_entropy and has stronger maintainer review signal.

Skipped PRs:

• Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254: Redundant with Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251; local merge conflicted in src/transformers/loss/loss_utils.py and added no distinct functionality.

Failed PRs:

• none

Notes:

• Verified branch was merge-cluster-cluster-43240-3-20260423223633 in the requested repo path.
• pr-search-cli cluster inspection showed issue kwargs are not passed to loss calculation function. huggingface/transformers#43240 with 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, but current origin/main still lacked forwarding of weight/label_smoothing in fixed_cross_entropy, so the fix remains relevant.
• Fetched PR heads locally from upstream as pr-43251 and pr-43254.
• Merged Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251 locally with a merge commit.
• Attempted Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254 after Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251; it produced a content conflict on the same hunk, so the merge was aborted cleanly.
• Repo was left coherent on the target branch with no in-progress merge.

Next steps:

• Run relevant tests in an environment with torch installed.
• If further validation is desired, compare whether Fix(43240): pass kwargs to nn.functional.cross_entropy huggingface/transformers#43251's retained **_kwargs behavior is preferred over Add supported kwargs to fixed_cross_entropy huggingface/transformers#43254's signature.
• Use the current branch as the local merge result for this cluster.

[evalstate]

Trace for this mergeability run: https://huggingface.co/datasets/evalstate/transformers-merge-experiments/blob/main/2604232350-3Qe6Xb__dev__codex.jsonl