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Test failures on NumPy<1.25 on linux-64 with AVX512_SKX instruction #10571
Triage suggests this is caused by a NumPy behavior change between version 1.24 and 1.25, in the implementation used for sin/cos on this system. For instance,
>>> a = np.pi * n / (M - 1)
>>> f"{np.cos(a):.20e}"
with np 1.24:
'-9.99999999999999888978e-01'
with np 1.25:
'-1.00000000000000000000e+00'
git bisects points to this NumPy commit - numpy/numpy@fe5472f
The commit changed the float64 sin/cos implementation to use trigonometric intrinsics instead of the previous path (which likely used SVML and uses AVX512_SKX).
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swap357 commentedon Apr 24, 2026
Triage suggests this is caused by a NumPy behavior change between version
1.24and1.25, in the implementation used forsin/coson this system. For instance,with
np 1.24:with
np 1.25:git bisects points to this NumPy commit - numpy/numpy@fe5472f
The commit changed the float64
sin/cosimplementation to use trigonometric intrinsics instead of the previous path (which likely used SVML and usesAVX512_SKX).esc commentedon Apr 27, 2026
Similar failure last weekend: https://github.com/esc/numba/actions/runs/24926163294
and
esc commentedon May 13, 2026
Ref: #10541 (comment)
esc commentedon May 19, 2026
Failed again:
https://github.com/numba/numba/actions/runs/26079252498/job/76677428478?pr=10541
esc commentedon Jun 10, 2026
https://github.com/numba/numba/actions/runs/27057216887/job/80034847671
esc commentedon Jun 10, 2026
https://github.com/numba/numba/actions/runs/26327833817/job/77510499211
esc commentedon Jun 10, 2026
https://github.com/numba/numba/actions/runs/24600147461/job/72217978718
swap357 commentedon Aug 3, 2026
Seems this is not yet resolved. CI failures were seen on the last scheduled test run -
https://github.com/numba/numba/actions/runs/30690701121/job/91345047940
esc commentedon Aug 17, 2026
Failed again:
https://github.com/numba/numba/actions/runs/31872473632/job/94985989811#step:5:14122