Issues

• [qa-hygiene] StochasticDiffEq QA group green on PR #4716

  SciML/OrdinaryDiffEq.jl#4937 · Filter by author ChrisRackauckas-Claude opened on Oct 27, 2026
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• In-place BrownFullBasicInit drops the ForwardDiff partials of u0: algebraic states get zero derivative

  SciML/OrdinaryDiffEq.jl#4936 · Filter by author SebastianM-C opened on Oct 27, 2026

• In-place RadauIIA3 uses reltol^(2/3) for its internal tolerance, out-of-place uses reltol^(3/4)

  SciML/OrdinaryDiffEq.jl#4928 · Filter by author singhharsh1708 opened on Oct 27, 2026

• Stripped default-solver solutions interpolate with the Hermite fallback, silently wrong

  SciML/OrdinaryDiffEq.jl#4927 · Filter by author singhharsh1708 opened on Oct 27, 2026

• strip_solution throws a MethodError for FBDF, QNDF, RadauIIA3/5 and the Rodas methods

  SciML/OrdinaryDiffEq.jl#4926 · Filter by author singhharsh1708 opened on Oct 27, 2026

• AdaptiveRadau dense output is wrong on steps taken before a change in stage count

  SciML/OrdinaryDiffEq.jl#4925 · Filter by author singhharsh1708 opened on Oct 27, 2026

• d_discontinuities does not restart multistep methods: FBDF and VCABM4 keep their pre-discontinuity history

  SciML/OrdinaryDiffEq.jl#4913 · Filter by author condekiq opened on Oct 23, 2026

• FIRK: smooth_est = false has no working error estimate, and extrapolant = :constant leaves the dense output without its stages

  SciML/OrdinaryDiffEq.jl#4912 · Filter by author condekiq opened on Oct 23, 2026

• In-place FIRK methods throw a MethodError with a vector abstol and a scalar reltol

  SciML/OrdinaryDiffEq.jl#4911 · Filter by author condekiq opened on Oct 23, 2026

• ExtrapolationMidpointHairerWanner and ExtrapolationMidpointDeuflhard default to threading = true, which throws inside or beside another threaded loop

  SciML/OrdinaryDiffEq.jl#4910 · Filter by author condekiq opened on Oct 23, 2026

• FBDF stops (dt below eps) on a 4-state self-pulsing oscillator that QNDF, Rodas5P and CVODE_BDF integrate

  SciML/OrdinaryDiffEq.jl#4909 · Filter by author condekiq opened on Oct 23, 2026

• d_discontinuities docs: t >= t_d does not "also work", and the convention is left-continuous

  SciML/OrdinaryDiffEq.jl#4908 · Filter by author condekiq opened on Oct 23, 2026

• strip_solution fails for solutions of composite algorithms

  SciML/OrdinaryDiffEq.jl#4907 · Filter by author devmotion opened on Oct 23, 2026

• has_lazy_interpolation is false for composite algorithms with lazy Verner methods, e.g. AutoVern7

  SciML/OrdinaryDiffEq.jl#4906 · Filter by author devmotion opened on Oct 23, 2026

• Adaptivity check nonlinearsolve always returning adaptive

  bug
  SciML/OrdinaryDiffEq.jl#4905 · Filter by author olivierbonte opened on Oct 23, 2026

• Allow DocStringExtensions 0.10

  SciML/OrdinaryDiffEq.jl#4903 · Filter by author ufechner7 opened on Oct 22, 2026

• Sparse finite-difference DAE tracing writes GradientTracer values into Float64 residual caches

  SciML/OrdinaryDiffEq.jl#4898 · Filter by author ChrisRackauckas-Claude opened on Oct 21, 2026

• Explicit ForwardDiff Brown initializer receives Float64 scratch from finite-difference DAE solver

  SciML/OrdinaryDiffEq.jl#4897 · Filter by author ChrisRackauckas-Claude opened on Oct 21, 2026

• Brown initialization uses uninitialized dense prototype values as sparsity

  SciML/OrdinaryDiffEq.jl#4896 · Filter by author ChrisRackauckas-Claude opened on Oct 21, 2026

• DelayDiffEq history keeps a longer k than the solver after a composite algorithm switches methods

  SciML/OrdinaryDiffEq.jl#4895 · Filter by author ramlakhanmadheshiya opened on Oct 21, 2026

• DelayDiffEq: DefaultCache perform_step! assigns stiff sub-caches of the wrong type to the history integrator

  SciML/OrdinaryDiffEq.jl#4891 · Filter by author ramlakhanmadheshiya opened on Oct 20, 2026

• AN5 returns Success with inaccurate state after adaptive rejections

  SciML/OrdinaryDiffEq.jl#4890 · Filter by author ChrisRackauckas-Claude opened on Oct 20, 2026

• AN5 returns Success with inaccurate state after an identity callback

  SciML/OrdinaryDiffEq.jl#4889 · Filter by author ChrisRackauckas-Claude opened on Oct 20, 2026

• Downstream Core4 fails on Julia 1.13.2: Enzyme mi2 !== nothing in EnsembleThreads (fixed in unreleased Enzyme.jl#3819)

  bot-generatedneeds-chris-review
  SciML/OrdinaryDiffEq.jl#4887 · Filter by author ChrisRackauckas opened on Oct 17, 2026

• Stiffness detection: components with identical stage values give 0/0 = NaN, which is treated as stiff

  SciML/OrdinaryDiffEq.jl#4878 · Filter by author devmotion opened on Oct 15, 2026
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