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Bug 1908117
Summary: | scipy: FTBFS in Fedora rawhide | ||
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Product: | [Fedora] Fedora | Reporter: | Marek Polacek <mpolacek> |
Component: | scipy | Assignee: | Nikola Forró <nforro> |
Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | rawhide | CC: | cstratak, david08741, mhroncok, nforro, python-sig, tomspur |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | If docs needed, set a value | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2021-01-12 10:03:59 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | |||
Bug Blocks: | 1868278, 1890881 |
Description
Marek Polacek
2020-12-15 20:57:36 UTC
Yes, I'm aware of this. It only happens on i686 and x86_64 (but perhaps these two tests are skipped on other architectures, I didn't check). Here is a reproducer: python3 -c 'import numpy as np; from scipy.sparse import diags; from scipy.sparse.linalg.eigen.arpack import eigsh; w, _ = eigsh(diags([1, -2, 1], [-1, 0, 1], shape=(50, 50)), k=3, v0=np.random.rand(50)); print(w)' This should print "[-3.99620666 -3.98484102 -3.9659462 ]", but on i686 and x86_64, with scipy compiled with gcc11, the result is quite different and not constant, it changes on each run. So perhaps some platform-specific optimization issue in gfortran? Yes, the underlying cause has been resolved in gcc, scipy builds fine and no tests fail with gcc-11.0.0-0.12. |