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Safely initialize the inplace Jacobian cache #160

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Safely initialize the inplace Jacobian cache #160

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6 changes: 6 additions & 0 deletions src/objective_types/oncedifferentiable.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,12 @@ function OnceDifferentiable(f, x_seed::AbstractArray, F::AbstractArray, DF::Abst
return OnceDifferentiable(fF, dfF, fdfF, x_seed, F, DF)
else
F2 = similar(F)
# Note that we fill the array to ensure that no elements are
# uninitialized, e.g. in the case of BigFloat which is not an isbits
# type. ForwardDiff requires that the array is fully initialized:
# https://github.com/JuliaDiff/ForwardDiff.jl/issues/740
fill!(F2, zero(eltype(F2)))

backend = get_adtype(autodiff, chunk)
jac_prep = DI.prepare_jacobian(f, F2, backend, x_seed)
function j!(_j, _x)
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