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fix: fix remake(::JumpProblem) #3581

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Merged
merged 1 commit into from
Apr 24, 2025
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fix: fix remake(::JumpProblem) #3581

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4 changes: 4 additions & 0 deletions src/systems/nonlinear/initializesystem.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -484,6 +484,10 @@ function SciMLBase.remake_initialization_data(

oldinitdata = odefn.initialization_data

# We _always_ build initialization now. So if we didn't build it before, don't do
# it now
oldinitdata === nothing && return nothing

if !(eltype(u0) <: Pair) && !(eltype(p) <: Pair)
oldinitdata === nothing && return nothing

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15 changes: 15 additions & 0 deletions test/jumpsystem.jl
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Expand Up @@ -551,3 +551,18 @@ end
sol = solve(jprob, SSAStepper())
@test eltype(sol[X]) === Int64
end

@testset "Issue#3571: `remake(::JumpProblem)`" begin
@variables X(t)
@parameters a b
eq = D(X) ~ a
rate = b * X
affect = [X ~ X - 1]
crj = ConstantRateJump(rate, affect)
@named jsys = JumpSystem([crj, eq], t, [X], [a, b])
jsys = complete(jsys)
oprob = ODEProblem(jsys, [:X => 1.0], (0.0, 10.0), [:a => 1.0, :b => 0.5])
jprob = JumpProblem(jsys, oprob)
jprob2 = remake(jprob; u0 = [:X => 10.0])
@test jprob2[X] ≈ 10.0
end
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