Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202608/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:python-fann2, so that this is still
visible in the BTS web page for this package.

Thanks.
--------------------------------------------------------------------------------
[...]
swig -python -c++ -o fann2/fann2_wrap.cpp fann2/fann2.i
creating build/temp.linux-x86_64-cpython-314/fann2
x86_64-linux-gnu-g++ -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DSWIG_COMPILE -I./include -I../include -Iinclude -I/usr/include/python3.14 -c fann2/fann2_wrap.cpp -o build/temp.linux-x86_64-cpython-314/fann2/fann2_wrap.o
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_create_standard_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10062:41: error: ‘PyInt_AsLong’ was not declared in this scope; did you mean ‘PyLong_AsLong’?
10062 |         arg2->array[i] = (unsigned int) PyInt_AsLong(o);
      |                                         ^~~~~~~~~~~~
      |                                         PyLong_AsLong
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_create_sparse_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10135:41: error: ‘PyInt_AsLong’ was not declared in this scope; did you mean ‘PyLong_AsLong’?
10135 |         arg3->array[i] = (unsigned int) PyInt_AsLong(o);
      |                                         ^~~~~~~~~~~~
      |                                         PyLong_AsLong
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_create_shortcut_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10200:41: error: ‘PyInt_AsLong’ was not declared in this scope; did you mean ‘PyLong_AsLong’?
10200 |         arg2->array[i] = (unsigned int) PyInt_AsLong(o);
      |                                         ^~~~~~~~~~~~
      |                                         PyLong_AsLong
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_get_layer_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10557:21: error: ‘PyInt_FromLong’ was not declared in this scope; did you mean ‘PyLong_FromLong’?
10557 |       PyObject *o = PyInt_FromLong( (long) result->array[i]);
      |                     ^~~~~~~~~~~~~~
      |                     PyLong_FromLong
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_get_bias_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10594:21: error: ‘PyInt_FromLong’ was not declared in this scope; did you mean ‘PyLong_FromLong’?
10594 |       PyObject *o = PyInt_FromLong( (long) result->array[i]);
      |                     ^~~~~~~~~~~~~~
      |                     PyLong_FromLong
fann2/fann2_wrap.cpp: In function ‘PyObject* _wrap_neural_net_set_weight_array(PyObject*, PyObject*)’:
fann2/fann2_wrap.cpp:10672:11: error: ‘PyInt_Check’ was not declared in this scope; did you mean ‘PySet_Check’?
10672 |       if (PyInt_Check(from_neuron) && PyInt_Check(to_neuron) &&
      |           ^~~~~~~~~~~
      |           PySet_Check
fann2/fann2_wrap.cpp:10674:53: error: ‘PyInt_AsLong’ was not declared in this scope; did you mean ‘PyLong_AsLong’?
10674 |         arg2->array[i].from_neuron = (unsigned int) PyInt_AsLong(from_neuron);
      |                                                     ^~~~~~~~~~~~
      |                                                     PyLong_AsLong
error: command '/usr/bin/x86_64-linux-gnu-g++' failed with exit code 1
E: pybuild pybuild:485: build: plugin distutils failed with: exit code=1: /usr/bin/python3 setup.py build
dh_auto_build: error: pybuild --build -i python{version} -p 3.14 --parallel=2 returned exit code 13
make: *** [debian/rules:13: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------

This issue is caused by the removal of the Python 2 compatibility macros in version 4.5.0 of SWIG. [1] According to the SWIG authors, these macros were retained in the generated code (pyhead.swg) solely for user typemaps. All typemap using these macros are updated to call the Python 3 C API directly.

I submitted a patch for fixing the issue as a merge request at Salsa. [2]

Best,

Rafael Laboissière

[1] https://github.com/swig/swig/commit/79f7a2b7cb7ddc256eba09c8770133148025171d
[2] https://salsa.debian.org/science-team/python-fann2/-/merge_requests/3

We believe that the bug you reported is fixed in the latest version of
python-fann2, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1146035@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Michael R. Crusoe <crusoe@debian.org> (supplier of updated python-fann2 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 10 Sep 2026 12:33:34 +0200
Source: python-fann2
Architecture: source
Version: 1:1.2.0+ds-6
Distribution: unstable
Urgency: medium
Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
Changed-By: Michael R. Crusoe <crusoe@debian.org>
Closes: 1146035
Changes:
 python-fann2 (1:1.2.0+ds-6) unstable; urgency=medium
 .
   * Team upload.
   * Accept patch from Rafael Laboissière to fix the FTBFS with swig
     4.5.0. Closes: #1146035.
   * Standards-Version: 4.7.4 (routine-update)
   * Reorder sequence of d/control VCS fields (cme)
   * Reflow Uploaders field (cme)
   * Remove Priority field (cme)
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 639acda8e581442e0b2424e325ad2caa781b5a7e 6540 python-fann2_1.2.0+ds-6.debian.tar.xz
 39e7b4bccfde59c84280b921391365c04c70375e 10378 python-fann2_1.2.0+ds-6_source.buildinfo
Checksums-Sha256:
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Files:
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 cfb6e074ec5966f450cb8b31b8d7aebf 6540 python optional python-fann2_1.2.0+ds-6.debian.tar.xz
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