32-bit Python 3.12.7 subprocess.run() cannot run executables from Windows\System32
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type-bug
- Dominant language
- Python
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Description
Bug report
Bug description:
PS C:\> py -V:3.12-32 -c "import subprocess; subprocess.run(['ssh'])"
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "C:\Users\Brecht Machiels\AppData\Local\Programs\Python\Python312-32\Lib\subprocess.py", line 548, in run
with Popen(*popenargs, **kwargs) as process:
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\Brecht Machiels\AppData\Local\Programs\Python\Python312-32\Lib\subprocess.py", line 1026, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Users\Brecht Machiels\AppData\Local\Programs\Python\Python312-32\Lib\subprocess.py", line 1538, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] The system cannot find the file specified
This does work in the 64-bit Python 3.12.7 (after renaming vcruntime140.dll; see #125872):
PS C:\> py -V:3.12 -c "import subprocess; subprocess.run(['ssh'])"
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
[-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
[-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]
[-i identity_file] [-J [user@]host[:port]] [-L address]
[-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
[-Q query_option] [-R address] [-S ctl_path] [-W host:port]
[-w local_tun[:remote_tun]] destination [command [argument ...]]
I'm assuming that this is because ssh.exe is an ARM executable. Using file in a Git Bash shell:
$ file "C:\Windows\System32\OpenSSH\ssh.exe"
C:\Windows\System32\OpenSSH\ssh.exe: PE32+ executable (console) Aarch64, for MS Windows, 6 sections
Calling an amd64 git does work:
PS C:\> py -V:3.12-32 -c "import subprocess; subprocess.run(['git', 'version'])"
git version 2.47.0.windows.1
$ file "C:\Program Files\Git\cmd\git.exe"
C:\Program Files\Git\cmd\git.exe: PE32+ executable (console) x86-64, for MS Windows, 13 sections
CPython versions tested on:
3.12
Operating systems tested on:
Windows 11 ARM
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
Reproduce the failure with the 32-bit Python 3.12 command on Windows 11 ARM, then inspect Lib/subprocess.py around Popen and _execute_child, especially the _winapi.CreateProcess call. Compare it with the successful 64-bit and amd64 Git cases; done means subprocess.run(['ssh']) can launch the Windows System32 executable in the reported configuration.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100