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wire 2026-05-25
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EXPERT PARALLEL MEMORY BUG FIXED, LIGHTEVAL GAINS IMAGE SUPPORT

By RepoJournal · Filed · About Hugging Face · Composed from the cited sources · methodology

JoelNiklaus
1 person shipped this
JoelNiklaus @JoelNiklaus 1 cited

Transformers shipped a critical fix for distributed model loading that was overestimating device memory in expert parallel runs, while lighteval patched a silent failure in task initialization.

The transformers team fixed a memory allocation bug [1] where the caching allocator's warmup phase was reading the wrong tensor parallelism plan and trying to preallocate as if expert weights weren't sharded. This could blow past device memory limits on multi-GPU setups running expert parallel inference. In a separate but equally quiet fix, lighteval addressed a ModuleNotFoundError [2] where the built-in MathVista task was importing PIL without declaring Pillow as a dependency. That meant running lighteval accelerate would fail during task registry initialization for any user without Pillow already installed. The hub-docs team also shipped automated Inference Providers documentation updates [3] reflecting the latest @huggingface/tasks and @huggingface/inference package versions. Dev version bumps landed across transformers as preparation for the next release.

$ ls huggingface/reviews/ # the step-back reads

the week in review Diffusers 0.41.0 ships Qwen-Image 2.1, TRL 1.15 goes breaking the month in review TRL ships 1.13 and 1.14, removing trl.losses
Full archive → Weekly reviews →

Quick answers

What shipped in Hugging Face on May 25, 2026?
Transformers shipped a critical fix for distributed model loading that was overestimating device memory in expert parallel runs, while lighteval patched a silent failure in task initialization. In total, 4 commits and 4 pull requests landed.
Who contributed to Hugging Face on May 25, 2026?
1 developer shipped this update, including JoelNiklaus.
What were the notable Hugging Face updates?
Fix caching allocator warmup byte estimation for EP model loading (#46149), Add Pillow dependency, and Update Inference Providers documentation (automated) (#2498).
♥

$ log @huggingface --recent

MoE expert sharding gets a test, lerobot swaps vendor SDKs for rustypot 59 shipped Transformers 5.20 ships Muse Spark Open, TRL adds AWS Trainium 97 shipped TRL defaults padding to "auto" on Neuron, drops vLLM 0.21.0 164 shipped AsyncGRPO packs rollouts as prefix trees, TRL types tool arguments by schema 80 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training verl rejects conflicting vLLM engine_kwargs, open-instruct adds MILES OPD behind a Megatron learner Interpretability nnsight 0.8.0 cuts import time from 7.6s to 1.6s

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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