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BUG: Fix alignment errors due to relaxed stride checking #14893

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merged 1 commit into from Oct 20, 2021
Merged

BUG: Fix alignment errors due to relaxed stride checking #14893

merged 1 commit into from Oct 20, 2021

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peterbell10
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Reference issue

Fixes errors in MacPython/scipy-wheels#132

What does this implement/fix?

NumPy's relaxed stride checking explicitly ignores length-1 dimensions, so if we don't as well then there will be false-positives as we were seeing in the windows build with python 3.10.
https://github.com/numpy/numpy/blob/5cb560616abe44774d897a80970775d2a26bb03b/numpy/core/src/common/array_assign.c#L114-L118

@peterbell10 peterbell10 added defect A clear bug or issue that prevents SciPy from being installed or used as expected scipy.spatial labels Oct 20, 2021
@github-actions github-actions bot added the C/C++ Items related to the internal C/C++ code base label Oct 20, 2021
tupui
tupui approved these changes Oct 20, 2021
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Thanks @peterbell10! I will wait for the CI and merge. Why this is only happening on windows?

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peterbell10 commented Oct 20, 2021 •
edited

Well it's strange that the non-aligned strides even exist. It looks as though NumPy is not writing to the stride of the length-1 dimension at all. Is it possible this is a fixed bug and the windows build is just using an older NumPy version?

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tupui commented Oct 20, 2021

Well it's strange that the non-aligned strides even exist. It looks as though NumPy is not writing to the stride of the length-1 dimension at all. Is it possible this is a fixed bug and the windows build is just using an older NumPy version?

Maybe it's fixed on main, but not in the latest release at least since I am using oldest-supported-numpy which in this case points to 1.21.2 (I just checked the logs).

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Oh well, in that case I have no idea why the strides are different on windows.

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tupui commented Oct 20, 2021

CI failures are not related, merging and 🤞 for windows.

@tupui tupui merged commit cd1c680 into scipy:master Oct 20, 2021
@peterbell10 peterbell10 deleted the cdist-relaxed-strides branch October 20, 2021 23:13
@tylerjereddy tylerjereddy added the backport-candidate This fix should be ported by a maintainer to previous SciPy versions. label Oct 25, 2021
@tylerjereddy tylerjereddy added this to the 1.8.0 milestone Oct 25, 2021
rgommers pushed a commit to rgommers/scipy that referenced this pull request Oct 29, 2021
@peterbell10 @rgommers
BUG: Fix alignment errors due to relaxed stride checking (scipy#14893)
cd2e9dc 
(cherry picked from commit cd1c680)
@tylerjereddy tylerjereddy modified the milestones: 1.8.0, 1.7.2 Oct 29, 2021
@tylerjereddy tylerjereddy removed the backport-candidate This fix should be ported by a maintainer to previous SciPy versions. label Oct 29, 2021
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C/C++ Items related to the internal C/C++ code base defect A clear bug or issue that prevents SciPy from being installed or used as expected scipy.spatial
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