LinearAlgebra/addmul/mul!(::Matrix{Int32}, ::LinearAlgebra.UpperTriangular{Int32, S} where S<:AbstractMatrix{Int32}, ::LinearAlgebra.UpperTriangular{Int32, S} where S<:AbstractMatrix{Int32}, α, β)/α = 10, β = 0/adjoint and transpose/fa = transpose, fb = identity @test returned_mat === Ccopy