LinearAlgebra/addmul/mul!(::Matrix{BigFloat}, ::LinearAlgebra.UpperTriangular{Float32, S} where S<:AbstractMatrix{Float32}, ::LinearAlgebra.Tridiagonal{BigFloat, V} where V<:AbstractVector{BigFloat}, α, β)/α = 0.04635021398105233780828626777292811311781406402587890625, β = false/β = 0 ignores C .= NaN @test returned_mat === Ccopy