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Segfault with NLopt #344

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baggepinnen opened this issue Aug 17, 2022 · 2 comments
Closed

Segfault with NLopt #344

baggepinnen opened this issue Aug 17, 2022 · 2 comments
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@baggepinnen
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Looks like there's something fishy in nlopt_set_xtol_abs

using Optimization, Symbolics, OptimizationNLopt, SparseArrays
using OptimizationNLopt.NLopt

N = 10
x0 = randn(N)
x = Symbolics.variables(:x, 1:N)
p = Symbolics.variable(:p)

cost = sum(abs2, x)
hess = Symbolics.hessian(cost, x)
hessfun = build_function(hess, x, p)[2]
hessfun = eval(hessfun)

costfun = (x,p)->sum(abs2, x)
grad = (g, x, p) -> g .= 2x
optfun = OptimizationFunction{false}(costfun; hess = hessfun, grad);
prob = OptimizationProblem(optfun, x0);
sol = solve(prob, NLopt.LD_AUGLAG_EQ());
julia> sol = solve(prob, NLopt.LD_AUGLAG_EQ());

signal (11): Segmentation fault
in expression starting at REPL[15]:1
memcpy at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
nlopt_set_xtol_abs at /home/fredrikb/.julia/artifacts/332af19a7ea5911ea41bb72ba5e3badcf5dd4ba1/lib/libnlopt.so (unknown line)
nlopt_optimize at /home/fredrikb/.julia/artifacts/332af19a7ea5911ea41bb72ba5e3badcf5dd4ba1/lib/libnlopt.so (unknown line)
optimize! at /home/fredrikb/.julia/packages/NLopt/OIUOZ/src/NLopt.jl:617
optimize at /home/fredrikb/.julia/packages/NLopt/OIUOZ/src/NLopt.jl:624 [inlined]
@baggepinnen
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A reduced example

using Optimization, OptimizationNLopt
using OptimizationNLopt.NLopt

N = 10
x0 = randn(N)
hessfun = (H,x,p) -> H[diaginds(H)] .= 2
costfun = (x,p)->sum(abs2, x)
grad = (g, x, p) -> g .= 2x
optfun = OptimizationFunction{false}(costfun; hess = hessfun, grad);
prob = OptimizationProblem(optfun, x0);
sol = solve(prob, NLopt.LD_AUGLAG());

@Vaibhavdixit02
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Can't reproduce, maybe the issue was not specifying the subsidiary solver here, this works

julia> sol = solve(prob, NLopt.LD_AUGLAG(), local_method = NLopt.LD_TNEWTON());
┌ Warning: NLopt failed to converge: FTOL_REACHED
└ @ OptimizationNLopt ~/Optimization.jl/lib/OptimizationNLopt/src/OptimizationNLopt.jl:239

julia> sol.objective
1.6639444629660956e-18

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@baggepinnen @Vaibhavdixit02