Environment
actions/setup-python v6.2.0- Runner:
windows-11-arm64 (20260419.19.1)
- Affected:
3.13t, 3.14t — non-free-threaded arm64 builds (3.11, 3.12) work fine
What happens
The zip is downloaded and extracted correctly, but python.exe and python3.exe in the tool cache are 0-byte reparse points (broken symlinks). setup.ps1:131 then fails to remove python.exe, and the resulting interpreter can't find its stdlib:
[error] Remove-Item : Cannot find path '...\arm64-freethreaded\python.exe' because it does not exist.
At setup.ps1:131 char:5 + Remove-Item -Path "$PythonArchPath\python.exe" -Force
[error] Fatal Python error: Failed to import encodings module
[error] ModuleNotFoundError: No module named 'encodings'
[error] Error happened during pip installation / upgrade
Directory listing after copy:
-a---l 0 python.exe ← 0-byte reparse point
-a---l 0 python3.exe
Root cause hypothesis
The win32-arm64-freethreaded zips contain python.exe as a symlink to python3.1Xt.exe. When the zip contents are copied to the tool cache, the symlink target doesn't exist at the expected relative path, leaving a dangling reparse point that powershell.exe can't delete.
Reference
Failing CI run: https://github.com/onnx/onnx/actions/runs/24930991133 (jobs 73008617679 and 73008617685)
Environment
actions/setup-pythonv6.2.0windows-11-arm64(20260419.19.1)3.13t,3.14t— non-free-threaded arm64 builds (3.11,3.12) work fineWhat happens
The zip is downloaded and extracted correctly, but
python.exeandpython3.exein the tool cache are 0-byte reparse points (broken symlinks).setup.ps1:131then fails to removepython.exe, and the resulting interpreter can't find its stdlib:Directory listing after copy:
Root cause hypothesis
The
win32-arm64-freethreadedzips containpython.exeas a symlink topython3.1Xt.exe. When the zip contents are copied to the tool cache, the symlink target doesn't exist at the expected relative path, leaving a dangling reparse point thatpowershell.execan't delete.Reference
Failing CI run: https://github.com/onnx/onnx/actions/runs/24930991133 (jobs
73008617679and73008617685)