Enable Enzyme tests in steady_state.jl on Julia 1.12+ (Enzyme 0.13.148)#1450
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ChrisRackauckas merged 1 commit intoMay 21, 2026
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Enzyme 0.13.148 closes the NonlinearProblem GC invariant (EnzymeAD/Enzyme.jl#3012) and SCCNonlinearProblem (EnzymeAD/Enzyme.jl#3026) issues that previously gated these. Verified on Julia 1.12.6: all `enzyme_gradient` blocks pass (NewtonRaphson / TrustRegion / Klement, iip and oop) and the `SteadyStateAdjoint(autojacvec = EnzymeVJP())` paths through `adjoint_sensitivities` return the correct gradients. Full file: 63 Pass / 1 Broken (the broken is a pre-existing `@test_skip` for `enzyme_gradient2` over `ZygoteVJP`, which is a separate "Enzyme can't differentiate through Zygote" limitation). Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
This was referenced May 21, 2026
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Please ignore until reviewed by @ChrisRackauckas.
Summary
test/steady_state.jlhadENZYME_AVAILABLEset tofalseon Julia 1.12+ because of NonlinearProblem + Enzyme segfaults / GC invariant violations on 1.12. Enzyme 0.13.148 (released 2026-05-21) closes:With those fixed,
using EnzymeandENZYME_AVAILABLE = truecan be unconditional. The Zygote-vs-Mooncake split forcompute_gradientis kept (separate concern: Zygote 0.7 has issues on 1.12).Verification
Locally on Julia 1.12.6 + Enzyme 0.13.148:
enzyme_gradientcases (NewtonRaphson/TrustRegion/Klement, iip+oop)SteadyStateAdjoint(autojacvec = EnzymeVJP())throughadjoint_sensitivities(res1h, res2h, res3h)The 1 Broken is
@test_skip falseforenzyme_gradient2overZygoteVJP— pre-existing, unrelated (Enzyme can't differentiate through Zygote's compiled code regardless of Julia version).Refs
Test plan
test/steady_state.jlon Julia 1.12.6: 63 Pass / 1 Broken