Re-enable downgrade CI with corrected compat floors#180
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ChrisRackauckas merged 2 commits intoJun 7, 2026
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Re-enables the Downgrade workflow (was `if: false`, disabled per SciML#149 for PrecompileTools compatibility) and raises the [compat] lower bounds to the lowest versions that resolve and pass the test suite on Julia 1.10 with the modern transitive SciML stack. Adds `allow-reresolve: true` to the downgrade.yml@v1 caller so Pkg picks a consistent transitive set (latest NonlinearSolveBase/SciMLOperators/ DifferentiationInterface) instead of the broken floor-direct/latest-transitive mix that `allow-reresolve: false` produces. Floor bumps (old -> new): - CommonSolve: 0.2 -> 0.2.4 (SciMLBase 2.153 requires CommonSolve >= 0.2.4) - DiffEqBase: 6 -> 6.210.1 (needs SciMLBase 2.143-2; coexists w/ latest NLSBase) - PrecompileTools: 1 -> 1.2.1 (SciMLBase >= 3.0/2.x stack requires >= 1.2.1; the SciML#149 blocker) - SciMLBase: 2 -> 2.153 (lowest 2.x that the latest NonlinearSolveBase accepts) - StaticArrays: 1 -> 1.9.8 (1.9.7 fails to precompile: UndefVarError require_one_based_indexing; DI 0.7 StaticArrays ext needs >= 1.9.7) - SymbolicIndexingInterface: 0.3 -> 0.3.43 (latest NonlinearSolveBase requires SII >= 0.3.43) Downgrade suite run locally at these floors (julia-downgrade-compat deps-mode =floor pins + Pkg.test allow_reresolve=true, Julia 1.10): PASS. Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com> Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Switch the Downgrade.yml caller from allow-reresolve: true to the strict SciML default allow-reresolve: false. With reresolve disabled, Pkg.test must instantiate the deps-floor + latest-transitive set produced by julia-downgrade-compat (mode deps) with no reconciliation, genuinely enforcing the declared [deps] floors against the latest transitive ecosystem. The existing compat floors are already strict-consistent: the deps-mode pinned set (SciMLBase 2.153, DiffEqBase 6.210.1, CommonSolve 0.2.4, ConcreteStructs 0.2.3, PrecompileTools 1.2.1, StaticArrays 1.9.8, SymbolicIndexingInterface 0.3.43; transitive deps at latest) resolves and the full suite passes. No floor raises were needed. Strict downgrade suite run locally on Julia 1.10 with [deps] pinned to floors and Pkg.test(; allow_reresolve=false): PASS (Testing DifferenceEquations tests passed). Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com> Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Re-enables the Downgrade workflow (currently
if: false, disabled per #149 due to PrecompileTools compatibility) and raises the[compat]lower bounds to the lowest versions that resolve and pass the full test suite on Julia 1.10 with the modern transitive SciML stack.Uses the strict SciML default
allow-reresolve: falseon thedowngrade.yml@v1caller. With reresolve disabled,Pkg.testmust instantiate the deps-floor + latest-transitive set produced byjulia-downgrade-compat(modedeps) with no reconciliation — this genuinely enforces the declared[deps]floors against the latest transitive ecosystem, which is the rigorous downgrade contract. The floors below are strict-consistent: the pinned set resolves and the full suite passes with no relaxation.Floor bumps (old -> new)
0.20.2.466.210.111.2.122.15311.9.80.30.3.43julia = "1.10"is unchanged; the downgrade workflow stays onjulia-version: "1.10"(LTS).Local verification (strict)
Reproduced CI's downgrade exactly:
julia-downgrade-compatdeps-mode=floorpins on the direct[deps], transitive deps at latest, thenPkg.test(; allow_reresolve=false)on Julia 1.10 in an isolated depot. Strict resolution succeeded at the floors (SciMLBase 2.153.0, DiffEqBase 6.210.1, CommonSolve 0.2.4, ConcreteStructs 0.2.3, PrecompileTools 1.2.1, StaticArrays 1.9.8, SymbolicIndexingInterface 0.3.43) with the latest transitive stack, and the full suite passed withallow_reresolve=false.Local strict downgrade suite: PASS (
Testing DifferenceEquations tests passed, 0 failures/errors).🤖 Generated with Claude Code