SafetensorError isn't pickle-able, it should be (smoke test for issue `import of module 'safetensors_rust' failed`)

[doctorpangloss]

System Info

(transformers-cli env breaks with jax issues right now, so here's the relevant version)

safetensors==0.7.0

Information

• The official example scripts
• My own modified scripts

Reproduction

from safetensors import SafetensorError
import pickle
pickle.dumps(SafetensorError())

fails with

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
_pickle.PicklingError: Can't pickle <class 'safetensors_rust.SafetensorError'>: import of module 'safetensors_rust' failed

Expected behavior

many integrations expect errors to be picklable or serializable. they don't have to be, but they reduce pain everywhere when they are.

another POV is this is probably a smoke test for a deeper issue that may be relevant