Potential Bug in Optimization.jl

Specific Domains Optimization (Mathematical)
1

Here is my code which utilizes Optimization.jl and ModelingToolkit.jl:

using BenchmarkTools, Optimization, OptimizationNLopt, ModelingToolkit
function func_1(x0,p)
    
    sse = sum(x0) + p[1]
    return sse
end

function cb(p,l)
    println("Running callback")
    display(p)
    display(l)
    return false
end
x0 = ones(2)
p = [2]
lower_bounds = zeros(2).-2
upper_bounds = zeros(2).+2
func = OptimizationFunction(func_1, AutoModelingToolkit(false,false))
prob = Optimization.OptimizationProblem(func,x0,p,lb = lower_bounds, ub = upper_bounds)
@time sol = solve(prob, NLopt.LD_LBFGS(), callback=cb, reltol = 1e2)

Code works fine, but the following line does not output anything:

sol.stats
2

sol.stats isn’t implemented yet