Re: python3.12 'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied

It seems that on scallywag it works, so it is problem on my computer only. Still it does 
not explain why and how to fix.


scallywag: running 'cygport all-test test'
 >>> Preparing duplicity-3.0.7-2.x86_64
 >>> Unpacking source duplicity-rel.3.0.7.tar.gz
*** Info: applying patch 01-docdir.patch (-p2):
patching file setup.py
Hunk #1 succeeded at 113 with fuzz 1 (offset 14 lines).
 >>> Preparing working source directory
 >>> Compiling duplicity-3.0.7-2.x86_64
Processing /cygdrive/d/a/scallywag/duplicity/duplicity-3.0.7-2.x86_64/build
   Preparing metadata (pyproject.toml): started
   Preparing metadata (pyproject.toml): finished with status 'done'
Building wheels for collected packages: duplicity
   Building wheel for duplicity (pyproject.toml): started
   Building wheel for duplicity (pyproject.toml): finished with status 'done'
   Created wheel for duplicity: 
filename=duplicity-3.0.7-cp312-cp312-cygwin_3_6_6_x86_64.whl size=1078278 
sha256=413e755e79294d77aa3365a9f969086d4abb6d464ec548d445a3138dbeecdfbe
   Stored in directory: 
/tmp/pip-ephem-wheel-cache-p0wui8k8/wheels/ff/99/0a/4710eab3c8a3e8690280473f0ccdc54f0b5819c3e8f07fd236
Successfully built duplicity


Dne 07.02.2026 v 19:04 Libor Ukropec via Cygwin napsal(a):
> I'm trying to move duplicity python package move from python3.9 to 3.12. The cygport file 
> is using python3-wheel.
> 
> For python 3.9 it works, for Python 3.12 I have the below error. I tried re-installing 
> python packages, even doing `C:\cygwin64\bin\dash.exe -c /usr/bin/rebaseall`, reboot to 
> make sure there's no stale cygwin.dll. No change. Any tips how to try to find the culprit 
> or fix?
> 
> 
> ```bash
> $ cygport duplicity.cygport download all-test check
> 
>  >>> Preparing duplicity-3.0.7-2.x86_64
>  >>> Unpacking source duplicity-rel.3.0.7.tar.gz
> *** Info: applying patch 01-docdir.patch (-p2):
> patching file setup.py
> Hunk #1 succeeded at 113 with fuzz 1 (offset 14 lines).
>  >>> Preparing working source directory
>  >>> Compiling duplicity-3.0.7-2.x86_64
> Processing /home/libor/cyg-port/duplicity/duplicity-3.0.7-2.x86_64/build
>    Preparing metadata (pyproject.toml): started
>        0 [main] python3.12 5948 child_info_fork::abort: address space needed by 
> 'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied
>    Preparing metadata (pyproject.toml): finished with status 'error'
>    error: subprocess-exited-with-error
> 
>    × Preparing metadata (pyproject.toml) did not run successfully.
>    │ exit code: 1
>    ╰─> [25 lines of output]
>              0 [main] python3.12 5948 child_info_fork::abort: address space needed by 
> 'StringIOTree.cpython-312-x86_64-cygwin.dll' (0x6C0000) is already occupied
>        Traceback (most recent call last):
>          File "/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/ 
> _in_process.py", line 389, in <module>
>            main()
>          File "/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/ 
> _in_process.py", line 373, in main
>            json_out["return_val"] = hook(**hook_input["kwargs"])
>                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>          File "/usr/lib/python3.12/site-packages/pip/_vendor/pyproject_hooks/_in_process/ 
> _in_process.py", line 175, in prepare_metadata_for_build_wheel
>            return hook(metadata_directory, config_settings)
>                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>          File "/usr/lib/python3.12/site-packages/setuptools/build_meta.py", line 374, in 
> prepare_metadata_for_build_wheel
>            self.run_setup()
>          File "/usr/lib/python3.12/site-packages/setuptools/build_meta.py", line 317, in 
> run_setup
>            exec(code, locals())
>          File "<string>", line 187, in <module>
>          File "<string>", line 144, in get_data_files
>          File "/usr/lib/python3.12/subprocess.py", line 548, in run
>            with Popen(*popenargs, **kwargs) as process:
>                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>          File "/usr/lib/python3.12/subprocess.py", line 1026, in __init__
>            self._execute_child(args, executable, preexec_fn, close_fds,
>          File "/usr/lib/python3.12/subprocess.py", line 1885, in _execute_child
>            self.pid = _fork_exec(
>                       ^^^^^^^^^^^
>        BlockingIOError: [Errno 11] Resource temporarily unavailable
>        [end of output]
> 
>    note: This error originates from a subprocess, and is likely not a problem with pip.
> error: metadata-generation-failed
> 
> × Encountered error while generating package metadata.
> ╰─> from file:///home/libor/cyg-port/duplicity/duplicity-3.0.7-2.x86_64/build
> 
> note: This is an issue with the package mentioned above, not pip.
> hint: See above for details.
> *** ERROR: pip3.12 wheel failed
> ```
> 
> 
> 


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