Combination of Python 3.12 on Ubuntu arm64 fails

[paulrobello]

Description:
Matrix test in github action is failing with combo of Python 3.12 on Ubuntu-latest arm64 arch

Action version:
actions/setup-python@v5

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
Python 3.12

Repro steps:

jobs:
  build:
    name: Build distribution 📦
    runs-on: ${{ matrix.os }}
    if: ${{ ! contains(github.event.head_commit.message, 'no-build') }}
    strategy:
      matrix:
        python-version: ["3.12"]
        os: [ubuntu-latest]
        arch: [arm64]
    steps:
      - uses: actions/checkout@v4
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          architecture: ${{ matrix.arch }}

Expected behavior:
Python should install

Actual behavior:

Version 3.12 was not found in the local cache
  Version 3.12 is available for downloading
  Download from "https://github.com/actions/python-versions/releases/download/3.[12](https://github.com/paulrobello/par_ai_core/actions/runs/12506270403/job/34890940519#step:3:13).8-12154062663/python-3.12.8-linux-22.04-arm64.tar.gz"
  Extract downloaded archive
  /usr/bin/tar xz --warning=no-unknown-keyword --overwrite -C /home/runner/work/_temp/7db71ffa-ecc2-476b-a589-d3c995a97ac4 -f /home/runner/work/_temp/059542d5-210f-4f0a-a58c-697246fd7e84
  Execute installation script
  Check if Python hostedtoolcache folder exist...
  Deleting Python 3.12.8
  Create Python 3.12.8 folder
  Copy Python binaries to hostedtoolcache folder
  Create additional symlinks (Required for the UsePythonVersion Azure Pipelines task and the setup-python GitHub Action)
  Upgrading pip...
  Error: ./setup.sh: line 54: ./python: cannot execute binary file: Exec format error
  Error: The process '/usr/bin/bash' failed with exit code 126

[priyagupta108]

Hi @paulrobello 👋,
Thank you for your report. We'll investigate the issue and get back to you with the details!

[priyagupta108]

Hi @paulrobello 👋,
The issue occurs due to the Exec format error, which indicates a mismatch in the architecture. The GitHub-hosted ubuntu-latest runner is designed for x64 architecture and cannot execute binaries meant for arm64 architecture. To resolve this, consider setting up a ubuntu self-hosted runner with arm64 support, which will allow you to run your workflows on the correct architecture.

For more information on setting up self-hosted runners, please refer to the GitHub documentation on self-hosted runners.