AttributeError: Can't pickle local object 'NestedPool.Process.<locals>.NoDaemonProcess' on Mac

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
backend

Research direction

Start with the linked GitHub Actions run and pull request to inspect the macOS traceback. Search the repository for NestedPool and NoDaemonProcess, then trace how that process class is created and serialized. Done means the reported macOS reproduction no longer raises the pickling error, with the relevant workflow or reproduction passing.

Written by the indexing model from the issue text.

Description

This issue is raised on macos.

Here's how to reproduce it on github actions (https://github.com/BlueBrain/BluePyMM/pull/250).

https://github.com/BlueBrain/BluePyMM/runs/7941237020?check_suite_focus=true

Dominant language
Python
Stars
13
Forks
9
PR merge metrics
No merged PRs in 30d

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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