Test case for triggering "ERROR: UndefVarError: Error not defined" in secant2! of hz_linesearch.jl

OptimTest.jl

module OptimTest

using Optim, Hadamard

function symcond(n,κ)
    Q = hadamard(n)
    D = diagm(exp(linspace(0,-log(κ),n)));
    Q*D*Q'/n
end
A = symcond(12,1e14)
temp = 1.0 + 1e-14*rand()

function c(x)
  c = dot(x,A*x)/2 
  #println("No op")
end

function g!(x,grad::Vector)
  grad[:] = (A*x).*temp
  #println("No op")
end

function cg!(x,grad::Vector)
  #A = symcond(12,1e14)
  c = dot(x,A*x)/2          # cost function
  #temp = 1.0 + 1e-14*rand()
  #println("temp = $temp")
  grad[:] = (A*x).*temp     # gradient
  return c
end

function driver()

  df = DifferentiableFunction(c,g!,cg!)
  inputvec = randn(12)
  println("inputvec = $inputvec")
  @time optim_output = Optim.optimize(df, inputvec, method = :l_bfgs, iterations = 10000, ftol=1e-6, grtol=1e-12, show_trace = false)

end

end