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Serialization security default

PyTorch torch.load weights_only Unsupported global safe_globals official documentation

A current PyTorch task fails with: PyTorch Lightning `.ckpt` custom callback Unsupported global.

search-observedPyTorchPython ML serializationSerialization security defaultgitdocs_candidate100

Agent Quick Fix

The local workspace gives the symptom and stale integration shape, but the correct repair depends on current official product behavior or recent release notes.

Product: PyTorch
Current-contract area: PyTorch Lightning `.ckpt` custom callback Unsupported global
Likely root cause: A current PyTorch task fails with: PyTorch Lightning `.ckpt` custom callback Unsupported global. The local stale integration is plausible but may not reflect the current external contract.
Repair direction: Verifier accepts a repair record only if it states the current contract and an actionable fix using source-backed product terms.

Validation Status

Codex searched organically, but the no-web counterfactual also passed under this fixture. Treat this as search-observed query evidence, not proof that search was necessary.

Symptom

A current PyTorch task fails with: PyTorch Lightning `.ckpt` custom callback Unsupported global. The local stale integration is plausible but may not reflect the current external contract.

Why This Happens

The local workspace gives the symptom and stale integration shape, but the correct repair depends on current official product behavior or recent release notes.

Verification

Verifier accepts a repair record only if it states the current contract and an actionable fix using source-backed product terms.

Common Wrong Fixes

  • Changing local code without checking the current external contract.
  • Retrying the same install, build, or API call with no version/source change.
  • Applying a broad unsafe bypass when a narrow compatibility fix is available.

Codex Search Keywords

These are the search terms observed in a neutral Codex validation run for this failure shape.

site:pytorch.org docs torch.load weights_only default 2.6 Unsupported global safe_globals
PyTorch torch.load weights_only Unsupported global safe_globals official documentation
https://pytorch.org/docs/stable/generated/torch.load.html
'weights_only' in https://docs.pytorch.org/docs/2.12/generated/torch.load.html
Lightning PyTorch load_from_checkpoint weights_only Unsupported global callback
lightning.pytorch.core.module LightningModule load_from_checkpoint weights_only docs
https://lightning.ai/docs/pytorch/stable/common/checkpointing_basic.html

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