"Cache entry deserialization failed, entry ignored" for Python Action
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Description
I'm using "actions/cache@v5" and I get the error:
WARNING: Cache entry deserialization failed, entry ignored
on the step of importing a Python requirements.txt file.
running on: ubuntu-latest
python-version: 3.14
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the warning from .github/workflows/python_run_script.yml on ubuntu-latest with Python 3.14 and actions/cache@v5. Trace the requirements.txt cache step to determine why deserialization fails; done means the workflow imports the requirements cache without the warning and ignored entry.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- github-actions, python
- Domain
- ci-cd
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100