LinearAlgebra/addmul/mul!(::LinearAlgebra.UpperTriangular{BigFloat, S} where S<:AbstractMatrix{BigFloat}, ::LinearAlgebra.UnitUpperTriangular{BigFloat, S} where S<:AbstractMatrix{BigFloat}, ::LinearAlgebra.Diagonal{Float64, V} where V<:AbstractVector{Float64}, α, β)/α = 0.69430049786833347713610464779776521027088165283203125, β = 0.69430049786833347713610464779776521027088165283203125/α = 0 ignores A .= NaN @test returned_mat === Ccopy