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Verbose showerror for SingularException #1204

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Merged
merged 2 commits into from
Feb 16, 2025
Merged

Verbose showerror for SingularException #1204

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8c7fe68
Detailed `showerror` for `SingularException`
jishnub Feb 13, 2025
c550974
change to pivot
jishnub Feb 15, 2025
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4 changes: 4 additions & 0 deletions src/exceptions.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,10 @@ struct SingularException <: Exception
info::BlasInt
end

function Base.showerror(io::IO, ex::SingularException)
print(io, "SingularException: matrix is singular; factorization failed. Zero eigenvalue found at index ", ex.info)
end

"""
PosDefException

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5 changes: 5 additions & 0 deletions test/dense.jl
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Expand Up @@ -1366,4 +1366,9 @@ end
@test !any(LinearAlgebra.getstructure(A))
end

@testset "SingularException show" begin
A = diagm(0=> [1, 0])
@test_throws "matrix is singular; factorization failed" inv(A)
end

end # module TestDense