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OrdinaryDiffEqBDF Core: DAE out-of-place custom-jac test errors with lu_instance(::Nothing) on master

Status: Open.

#4304 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 18, 2026

calc_W! never marks an operator Jacobian as updated, so a caching linear solver cannot see J move

Status: Open.

#4303 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 18, 2026

Matrix-free jac_prototype crashes in prepare_user_sparsity before any solve

Status: Open.

#4302 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 18, 2026

Mooncake gradient through SensitivityADPassThrough fails with a typeassert in get_concrete_problem

Status: Open.

#4294 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 17, 2026

Hairer4/Hairer42 with KrylovJL_GMRES fail on an index-1 DAE (Regression_I)

Status: Open.

#4293 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 17, 2026

CI: OrdinaryDiffEqDifferentiation 3.9.0 is unregistered, breaking six resolution jobs

Status: Open.

#4292 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 17, 2026

ROS3P, ROS3PR and ROS34PW1a: adaptivity does not respond to tolerance

Status: Open.

#4291 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 17, 2026

ρ∞-Bathe method for structural dynamics

Status: Open.

#4286 In SciML/OrdinaryDiffEq.jl;

· Sreeram-Shankar opened on Aug 16, 2026

docs: catalog remaining public and developer interfaces

Status: Open.

#4285 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 16, 2026

NonlinearSolveAlg silently fails with quasi-Newton inner solvers (Broyden, Klement)

Status: Open.

#4283 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 16, 2026

RadauIIA: reuse one Jacobian reduction across the real and complex stage matrices

Status: Open.

#4281 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 16, 2026

NonlinearSolve downgrade job: OrdinaryDiffEqCore floor 4.12 predates the get_differential_vars inference fix; 4.13 then hits the MatrixOperator diagnostics MethodError (#4244)

Status: Open.

#4278 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 15, 2026