Shogun has been broken for a while [0].
Looks like the latest update to openblas, by f07a0615ea (openblas:
0.3.20 -> 0.3.21, 2022-08-10), broke the `libshogun-mathematics_lapack`
example. It calculates the eigenvectors for a matrix, but the assertions
now fail:
compute_eigenvectors
A=[
[ -0.500000000000000111, 0.707106781186547351, 0.5],
[ 0.707106781186547351, 1.04083408558608426e-16, 0.707106781186547129],
[ -0.499999999999999722, -0.707106781186547462, 0.5]
]
eigenvalues=[-1.41421356237309492,1.04083408558608426e-17,1.41421356237309492]
terminate called after throwing an instance of 'shogun::ShogunException'
The darwin build output shows a bit more detail:
assertion is_equal(A(0,0), 0.5, eps) failed in void test_ev()
file /tmp/nix-build-shogun-6.1.4.drv-0/source/examples/undocumented/libshogun/mathematics_lapack.cpp
line 49
Disable the test to fix the build, although the results seem "correct".
It appears that openblas now calculates values with slightly less
precision, thus the assertion fails due to the expected epsilon.
[0]: https://hydra.nixos.org/build/194671473
The checkPhase may take from 30 minutes up to 2 hours and 30 minutes on
Hydra due to these tests:
[...]
311/375 Test #311: libshogun-evaluation_cross_validation_classification ............ Passed 247.33 sec
312/375 Test #313: libshogun-evaluation_cross_validation_mkl_weight_storage ........ Passed 428.31 sec
315/375 Test #312: libshogun-evaluation_cross_validation_locked_comparison ......... Passed 880.44 sec
341/375 Test #316: libshogun-evaluation_cross_validation_regression ................ Passed 380.48 sec
342/375 Test #343: libshogun-modelselection_grid_search_kernel ..................... Passed 4866.85 sec
343/375 Test #344: libshogun-modelselection_grid_search_linear ..................... Passed 574.78 sec
345/375 Test #342: libshogun-modelselection_combined_kernel_sub_parameters ......... Passed 5929.90 sec
375/375 Test #346: libshogun-modelselection_grid_search_multiclass_svm ............. Passed 1826.27 sec
[...]
Total Test time (real) = 9046.65 sec
checkPhase completed in 2 hours 30 minutes 47 seconds
