Description
Since python/cpython#127775 landed in cPython's 3.13 branch, TestNewFFI1.test_import_from_lib has started to fail:
$ PYTHONPATH=build/lib.linux-x86_64-cpython-313/ python3.13 -m pytest testing/cffi1/test_new_ffi_1.py -k test_import_from_lib
==================================== test session starts =====================================
platform linux -- Python 3.13.1, pytest-8.3.3, pluggy-1.5.0
rootdir: /home/stefanor/git/upstream/cffi
configfile: pyproject.toml
plugins: asyncio-0.20.3, flaky-3.8.1, cov-5.0.0, mock-3.14.0, typeguard-4.4.1, anyio-4.6.2, xonsh-0.18.4, hypothesis-6.122.1
asyncio: mode=Mode.STRICT
collected 124 items / 123 deselected / 1 selected
testing/cffi1/test_new_ffi_1.py F [100%]
========================================== FAILURES ==========================================
______________________________ TestNewFFI1.test_import_from_lib ______________________________
self = <testing.cffi1.test_new_ffi_1.TestNewFFI1 object at 0x7f13dee63200>
def test_import_from_lib(self):
ffi2 = cffi.FFI()
ffi2.cdef("int myfunc(int); extern int myvar;\n#define MYFOO ...\n")
outputfilename = recompile(ffi2, "_test_import_from_lib",
"int myfunc(int x) { return x + 1; }\n"
"int myvar = -5;\n"
"#define MYFOO 42", tmpdir=str(udir))
load_dynamic("_test_import_from_lib", outputfilename)
from _test_import_from_lib.lib import myfunc, myvar, MYFOO
assert MYFOO == 42
assert myfunc(43) == 44
assert myvar == -5 # but can't be changed, so not very useful
with pytest.raises(ImportError):
> from _test_import_from_lib.lib import bar
E TypeError: bad argument type for built-in operation
testing/cffi1/test_new_ffi_1.py:1799: TypeError
----------------------------------- Captured stdout setup ------------------------------------
generating /tmp/ffi-2/test_new_ffi_1.c
setting the current directory to '/tmp/ffi-2'
------------------------------------- Captured log setup -------------------------------------
INFO root:dist.py:970 running build_ext
INFO root:build_ext.py:530 building 'test_new_ffi_1' extension
INFO root:spawn.py:60 x86_64-linux-gnu-gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O2 -Wall -fPIC -I/usr/include/python3.13 -c test_new_ffi_1.c -o ./test_new_ffi_1.o
INFO root:spawn.py:60 x86_64-linux-gnu-gcc -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 ./test_new_ffi_1.o -L/usr/lib/x86_64-linux-gnu -o ./test_new_ffi_1.cpython-313-x86_64-linux-gnu.so
------------------------------------ Captured stdout call ------------------------------------
generating /tmp/ffi-2/_test_import_from_lib.c
setting the current directory to '/tmp/ffi-2'
------------------------------------- Captured log call --------------------------------------
INFO root:dist.py:970 running build_ext
INFO root:build_ext.py:530 building '_test_import_from_lib' extension
INFO root:spawn.py:60 x86_64-linux-gnu-gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O2 -Wall -fPIC -I/usr/include/python3.13 -c _test_import_from_lib.c -o ./_test_import_from_lib.o
INFO root:spawn.py:60 x86_64-linux-gnu-gcc -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fwrapv -O2 ./_test_import_from_lib.o -L/usr/lib/x86_64-linux-gnu -o ./_test_import_from_lib.cpython-313-x86_64-linux-gnu.so
====================================== warnings summary ======================================
../../../../../usr/lib/python3/dist-packages/zombie_imp/__init__.py:1
/usr/lib/python3/dist-packages/zombie_imp/__init__.py:1: DeprecationWarning: the imp module was removed in favour of importlib. Someone brought it back, but it's not a good idea to use it.
from .imp_3_11 import *
-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
================================== short test summary info ===================================
FAILED testing/cffi1/test_new_ffi_1.py::TestNewFFI1::test_import_from_lib - TypeError: bad argument type for built-in operation
======================== 1 failed, 123 deselected, 1 warning in 2.26s ========================
This looks like a CPython regression. But the behaviour is rather subtle.