TST: add tests for stable ABI numpy extensions by kumaraditya303 · Pull Request #31822 · numpy/numpy

kumaraditya303 · 2026-07-01T09:59:45Z

PR summary

This PR adds tests for stable ABI extensions compiled with numpy C-API as well as cython API.
limited_api.c is used as a template and parameterized by MODULE_NAME for every combination of Python abi3 version and NumPy target version. Same is done for limited_api_cython where cython extension is tested against every combination of Python abi3 version and NumPy target version. I've expanded tests to cover the datetime APIs which was broken recently to avoid such future breakages.

The failing MSVC test on x86 is because of #31762 which is now detected as a failure.

AI Disclosure

I used Claude to work on this.

kumaraditya303 · 2026-07-01T11:00:56Z

Seems like gcc 9 which is used in the failing old_gcc CI does not support taking address of opaque pointer while de-referencing it. In Limited C-API PyTypeObject is opaque and previously the tests were empty so this was missed, we may need to skip this on such old gcc compilers.

rror: dereferencing pointer to incomplete type ‘PyTypeObject’ {aka ‘struct _typeobject’}
   1156 | #define PyTimedeltaArrType_Type (*(PyTypeObject *)PyArray_API[216])
        |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /opt/hostedtoolcache/Python/3.12.13/x64/include/python3.12/object.h:384:80: note: in definition of macro ‘PyObject_TypeCheck’
    384 | #  define PyObject_TypeCheck(ob, type) PyObject_TypeCheck(_PyObject_CAST(ob), (type))
        |                                                                                ^~~~
  limited_api_cython_3_9_npy2_0.abi3.so.p/limited_api_cython.pyx.c:5078:47: note: in expansion of macro ‘PyTimedeltaArrType_Type’
   5078 |   __pyx_r = PyObject_TypeCheck(__pyx_v_obj, (&PyTimedeltaArrType_Type));
        |                                               ^~~~~~~~~~~~~~~~~~~~~~~

Co-authored-by: da-woods <[email protected]>

ngoldbaum · 2026-07-01T20:13:22Z

We talked about this at the community meeting and no one objected to dropping gcc9 from the CI matrix. I'm going to put in a PR to do that.

ngoldbaum

Overall looks pretty good. I left some comments inline.

Co-authored-by: Nathan Goldbaum <[email protected]>

…-tests

…thon

ngoldbaum · 2026-07-03T18:03:43Z

I think if you rebase on or merge with main the error will go away because #31843 is merged.

ngoldbaum

I did one more review pass and caught a couple minor issues and one suggestion about testing without NPY_TARGET_VERSION that I missed on the last pass. Otherwise I think this looks great so I'm approving. Please go ahead and merge this once you've addressed this last round of comments.

Co-authored-by: Nathan Goldbaum <[email protected]>

charris · 2026-07-06T15:13:55Z

Missed the cython version check in meson.build. I'll fix that.

charris · 2026-07-06T15:19:34Z

See #31875.

Co-authored-by: da-woods <[email protected]> Co-authored-by: Nathan Goldbaum <[email protected]>

TST: add tests for stable ABI numpy extensions (#31822)

This MR contains the following updates: | Package | Type | Update | Change | OpenSSF | |---|---|---|---|---| | [numpy](https://github.com/numpy/numpy) ([changelog](https://numpy.org/doc/stable/release)) | dependencies | patch | `2.5.0` → `2.5.2` | [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/numpy/numpy/badge)](https://securityscorecards.dev/viewer/?uri=github.com/numpy/numpy) | | [uvicorn](https://github.com/Kludex/uvicorn) ([changelog](https://uvicorn.dev/release-notes)) | dependencies | patch | `0.52.1` → `0.52.3` | [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/Kludex/uvicorn/badge)](https://securityscorecards.dev/viewer/?uri=github.com/Kludex/uvicorn) | --- ### Release Notes <details> <summary>numpy/numpy (numpy)</summary> ### [`v2.5.2`](https://github.com/numpy/numpy/releases/tag/v2.5.2): (Aug 9, 2026) [Compare Source](numpy/numpy@v2.5.1...v2.5.2) ### NumPy 2.5.2 Release Notes The NumPy 2.5.2 is a patch release that fixes bugs discovered after the 2.5.1 release. The big news is that it includes wheels for the newly released Python 3.15.0rc1. This release supports Python versions 3.12-3.15 #### C API changes ##### `PyArray_StringDTypeObject` is opaque under the abi3t stable ABI The `PyArray_StringDTypeObject` was accidentally exposed in NumPy 2.5 when targeting the free-threading-compatible stable ABI (`Py_TARGET_ABI3T`). `PyArray_StringDTypeObject` is now an opaque struct: extensions compiled that way cannot access its fields, since the struct layout depends on the size of the object header. Any code that accessed `PyArray_StringDTypeObject` fields in an abi3t build would have crashed, so we are making this API change in a bugfix release. The `NpyString` allocator API remains usable by passing the descriptor object pointer, e.g. `NpyString_acquire_allocator((PyArray_StringDTypeObject *)descr)`. ([gh-31771](numpy/numpy#31771)) #### Contributors A total of 16 people contributed to this release. People with a "+" by their names contributed a patch for the first time. - Abhijeetsingh Meena + - Charalampos Stratakis - Charles Harris - Chris Ninham + - David Woods - Geonho + - Gopu Yeshwanth Reddy + - Iason Krommydas - Ijtihed Kilani - Jelle Zijlstra + - Joren Hammudoglu - Kumar Aditya - Mike Boyle - Nathan Goldbaum - Raghuveer Devulapalli - Sebastian Berg #### Pull requests merged A total of 28 pull requests were merged for this release. - [#31864](numpy/numpy#31864): MAINT: Prepare 2.5.x for further development - [#31889](numpy/numpy#31889): TYP: Backport multiple static typing fixes 1. - [#31900](numpy/numpy#31900): TST: add tests for stable ABI numpy extensions ([#31822](numpy/numpy#31822)) - [#31901](numpy/numpy#31901): BUG: fix `StringDType` coerce flag in binary ufunc promotion... - [#31902](numpy/numpy#31902): BLD: fix meson deprecation warnings ([#31892](numpy/numpy#31892)) - [#31921](numpy/numpy#31921): TYP: Backport multiple typing fixes 2. - [#31947](numpy/numpy#31947): MAINT: Update x86-simd-sort subproject ([`5adb334`](numpy/numpy@5adb334) → [`fa944ef`](numpy/numpy@fa944ef)) ([#31908](numpy/numpy#31908)) - [#31949](numpy/numpy#31949): BUG: fix crash on 32 bit systems using abi3t ([#31771](numpy/numpy#31771)) - [#31950](numpy/numpy#31950): MNT: remove some obsolete string to bool workarounds ([#31859](numpy/numpy#31859)) - [#31952](numpy/numpy#31952): BUG: centralized helper for output coerce and na\_object in stringdtype... - [#31953](numpy/numpy#31953): BUG: fix CPU feature env diagnostic buffer overruns ([#31905](numpy/numpy#31905)) - [#31954](numpy/numpy#31954): BUG: restore ndarray.conjugate() for legacy user-defined dtypes... - [#31955](numpy/numpy#31955): TYP: Avoid shadowed dtype annotations - [#32077](numpy/numpy#32077): MAINT: Update verdored-meson/meson to match main. - [#32114](numpy/numpy#32114): BUG: fix refcount leak on overlapping copyto with where=False - [#32115](numpy/numpy#32115): BUG: fix swallowed cast error in fancy indexing assignment ([#31975](numpy/numpy#31975)) - [#32116](numpy/numpy#32116): BUG: Fix buffered iterator stride after removing multi-index - [#32117](numpy/numpy#32117): BUG: fix `np.fromiter` corruption when reusing a `StringDType`... - [#32119](numpy/numpy#32119): BUG: add a special case for StringDType in np.isdtype ([#32030](numpy/numpy#32030)) - [#32121](numpy/numpy#32121): BUG: reference leak in `simd_sequence_from_iterable` ([#32038](numpy/numpy#32038)) - [#32122](numpy/numpy#32122): BUG: ensure lock is held when accessing or writing to RNG state... - [#32123](numpy/numpy#32123): BUG: fully reset cached RNG state for non-MT19937 RNGs ([#32062](numpy/numpy#32062)) - [#32135](numpy/numpy#32135): TYP: type capabilities max dimensions - [#32158](numpy/numpy#32158): BUG: avoid possible stack overflow in arraydescr\_dealloc ([#32133](numpy/numpy#32133)) - [#32206](numpy/numpy#32206): MAINT: Update cibuildwheel to v4.2.0 - [#32214](numpy/numpy#32214): MAINT: Skip limited\_api tests on some platforms. - [#32220](numpy/numpy#32220): TYP: `isclose` shape-typing fix for 2d array-likes ([#32205](numpy/numpy#32205)) - [#32221](numpy/numpy#32221): BUG: avoid segfaults when legacy copyswap slot is not defined... ### [`v2.5.1`](https://github.com/numpy/numpy/releases/tag/v2.5.1): (July 4, 2026) [Compare Source](numpy/numpy@v2.5.0...v2.5.1) ### NumPy 2.5.1 Release Notes The NumPy 2.5.1 is a patch release that fixes bugs discovered after the 2.5.0 release. The most noticeable is the fix is to the numpy datetime cython API which should allow downstream to support NumPy versions older than 2.5. Preparation for Python 3.15 continues along with typing improvements. This release supports Python versions 3.12-3.14 #### Changes - The minimum supported GCC version has been updated from 9.3.0 to 10.3.0 ([gh-31843](numpy/numpy#31843)) #### Contributors A total of 10 people contributed to this release. People with a "+" by their names contributed a patch for the first time. - Adhyan Gupta + - Ankit Ahlawat - Charles Harris - Iason Krommydas - Joren Hammudoglu - Kumar Aditya - Nathan Goldbaum - Sebastian Berg - Ties Jan Hefting + - Vineet Kumar #### Pull requests merged A total of 20 pull requests were merged for this release. - [#31707](numpy/numpy#31707): MAINT: Prepare 2.5.x for further development - [#31721](numpy/numpy#31721): CI: fix new `cython-lint` errors ([#31711](numpy/numpy#31711)) - [#31723](numpy/numpy#31723): MAINT: Update meson to match main - [#31729](numpy/numpy#31729): TST: use setup-sde instead of curl to get SDE binaries ([#31727](numpy/numpy#31727)) - [#31829](numpy/numpy#31829): BUG: Relax finfo to be easier accessible for all user dtypes... - [#31831](numpy/numpy#31831): TYP: Fix `flatiter.__next__` return type for `object_` and... - [#31832](numpy/numpy#31832): BUG: avoid deadlocks using NpyString API ([#31682](numpy/numpy#31682)) - [#31833](numpy/numpy#31833): BUG: fix out array leak in reduceat and accumulate when dtype... - [#31835](numpy/numpy#31835): BUG: fix numpy datetime cython APIs to be compatible with older... - [#31836](numpy/numpy#31836): TYP: Fix incorrect dtype inference of `asarray([])` ([#31732](numpy/numpy#31732)) - [#31837](numpy/numpy#31837): TYP: Fix `np.ma.masked_array` 2.5.0 regression - [#31838](numpy/numpy#31838): FIX: Refactor error handling in array\_setstate to prevent typecode... - [#31839](numpy/numpy#31839): TST: xfail multithreaded BLAS test more generously - [#31840](numpy/numpy#31840): MAINT: Rename subroutine for crackfortran tests - [#31842](numpy/numpy#31842): BUG: fix leak in reductions when a ufunc override errors or is... - [#31849](numpy/numpy#31849): BLD: set minimum required gcc version to 10.3 ([#31843](numpy/numpy#31843)) - [#31855](numpy/numpy#31855): CI: fix hangs on MacOS ASan CI ([#31853](numpy/numpy#31853)) - [#31856](numpy/numpy#31856): BUG: fix several bugs in StringDType operations ([#31846](numpy/numpy#31846)) - [#31857](numpy/numpy#31857): BUG: Fix segfault in MT19937 by preventing recursive seed lists... - [#31858](numpy/numpy#31858): BUG: Fix signed integer overflow in datetime.c ([#31688](numpy/numpy#31688)) </details> <details> <summary>Kludex/uvicorn (uvicorn)</summary> ### [`v0.52.3`](https://github.com/Kludex/uvicorn/releases/tag/0.52.3): Version 0.52.3 [Compare Source](Kludex/uvicorn@0.52.2...0.52.3) ##### Changed - Update `zttp` to 0.0.24 and use its combined receive path, improving HTTP/1.1 request parsing performance ([#3067](Kludex/uvicorn#3067)) **Full Changelog**: <Kludex/uvicorn@0.52.2...0.52.3> ### [`v0.52.2`](https://github.com/Kludex/uvicorn/releases/tag/0.52.2): Version 0.52.2 [Compare Source](Kludex/uvicorn@0.52.1...0.52.2) ##### Fixed - Update `zttp` to 0.0.22, fixing bodyless request receives and improving HTTP/1 request parsing performance ([#3063](Kludex/uvicorn#3063)) **Full Changelog**: <Kludex/uvicorn@0.52.1...0.52.2> </details> --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).  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kumaraditya303 added 4 commits July 1, 2026 15:27

TST: add tests for stable ABI numpy extensions

3458691

fix lint

ac8834d

use consistent version format

af3d878

fix lint

8964225

kumaraditya303 marked this pull request as ready for review July 1, 2026 10:55

kumaraditya303 requested a review from seberg July 1, 2026 11:01

seberg requested a review from ngoldbaum July 1, 2026 11:03

da-woods reviewed Jul 1, 2026

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Comment thread numpy/_core/tests/examples/limited_api/meson.build Resolved

Update numpy/_core/tests/examples/limited_api/meson.build

df6045c

Co-authored-by: da-woods <[email protected]>

kumaraditya303 added the 05 - Testing label Jul 1, 2026

skip test_limited_opaque for 32 bits

c70d871

charris added the 09 - Backport-Candidate PRs tagged should be backported label Jul 1, 2026

ngoldbaum reviewed Jul 1, 2026

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ngoldbaum mentioned this pull request Jul 1, 2026

BLD: update minimum required GCC to GCC 10 #31828

Closed

kumaraditya303 and others added 8 commits July 2, 2026 10:50

Update numpy/_core/tests/test_limited_api.py

a97fa6d

Co-authored-by: Nathan Goldbaum <[email protected]>

Update numpy/_core/tests/test_limited_api.py

5e085ae

Co-authored-by: Nathan Goldbaum <[email protected]>

address review

57b840d

Merge remote-tracking branch 'refs/remotes/origin/abi-tests' into abi…

6b32879

…-tests

add comment about keeping list in sync

e6eae07

use NPY_TOSTRING

07dc272

use NPY_NO_DEPRECATED_API=NPY_1_21_API_VERSION as old test did for cy…

798b273

…thon

fix lint

6427494

ngoldbaum approved these changes Jul 3, 2026

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Comment thread numpy/_core/tests/examples/limited_api/meson.build Resolved

Comment thread numpy/_core/tests/test_limited_api.py Resolved

Comment thread numpy/_core/tests/test_limited_api.py Resolved

Comment thread numpy/_core/tests/examples/limited_api/limited_api_cython.pyx Resolved

kumaraditya303 and others added 4 commits July 6, 2026 13:57

Update numpy/_core/tests/examples/limited_api/limited_api_cython.pyx

7848cf3

Co-authored-by: Nathan Goldbaum <[email protected]>

Merge branch 'main' of https://github.com/numpy/numpy into abi-tests

89da479

test default version

a20bd3a

use cython 3.1.0 or newer

11e43a1

kumaraditya303 merged commit afeda72 into numpy:main Jul 6, 2026
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kumaraditya303 deleted the abi-tests branch July 6, 2026 14:10

MaanasArora pushed a commit to MaanasArora/numpy that referenced this pull request Jul 7, 2026

TST: add tests for stable ABI numpy extensions (numpy#31822)

c2c0494

Co-authored-by: da-woods <[email protected]> Co-authored-by: Nathan Goldbaum <[email protected]>

charris mentioned this pull request Jul 7, 2026

TST: add tests for stable ABI numpy extensions (#31822) #31900

Merged

charris removed the 09 - Backport-Candidate PRs tagged should be backported label Jul 7, 2026

charris mentioned this pull request Jul 7, 2026

MAINT: Update Cython version check. #31875

Merged

charris pushed a commit that referenced this pull request Jul 7, 2026

TST: add tests for stable ABI numpy extensions (#31822)

fb0cf33

Co-authored-by: da-woods <[email protected]> Co-authored-by: Nathan Goldbaum <[email protected]>

charris added a commit that referenced this pull request Jul 7, 2026

Merge pull request #31900 from charris/backport-31822

a13a219

TST: add tests for stable ABI numpy extensions (#31822)

mattip mentioned this pull request Aug 27, 2026

MAINT: skip failing cython limited API tests on Cython 3.3.0 #32407

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