Stabilized RK methods do not work with `Unitful`

[yaccos]

Describe the bug 🐞

I discovered that the family of stabilized RK methods do not work when the time is given by a Unitful quantity.

Expected behavior

ODE problem is solved successfully as it does when using certain solvers such as RK4() and Tsit5().

Minimal Reproducible Example 👇

using Unitful
using DifferentialEquations
f(u, p, t) = u ./ u"s"
f!(du,u, p, t) = (du .= u ./ u"s")
u0 = [0.0]
t_span = (0.0u"s", 1.0u"s")
problem_const = ODEProblem(f, u0, t_span)
problem_mut = ODEProblem(f!, u0, t_span)
solve(problem_const, ESERK5())
solve(problem_mut, ESERK5())

Error & Stacktrace ⚠️
For solve(problem_const, ESERK5()):

ERROR: DimensionError: 1.0 and 1.4901161193847656e-8 s^-1 are not dimensionally compatible.
Stacktrace:
  [1] +(x::Quantity{Float64, NoDims, Unitful.FreeUnits{…}}, y::Quantity{Float64, 𝐓^-1, Unitful.FreeUnits{…}} )
    @ Unitful .julia\packages\Unitful\sxiHA\src\quantities.jl:137
  [2] +(x::Float64, y::Quantity{Float64, 𝐓^-1, Unitful.FreeUnits{(s^-1,), 𝐓^-1, nothing}}  )
    @ Base .\promotion.jl:429
  [3] _broadcast_getindex_evalf
    @ .\broadcast.jl:678 [inlined]
  [4] _broadcast_getindex
    @ .\broadcast.jl:651 [inlined]
  [5] getindex
    @ .\broadcast.jl:610 [inlined]
  [6] copy
    @ .\broadcast.jl:911 [inlined]
  [7] materialize
    @ .\broadcast.jl:872 [inlined]
  [8] broadcast_preserving_zero_d
    @ .\broadcast.jl:861 [inlined]
  [9] +
    @ .\arraymath.jl:16 [inlined]
 [10] maxeig!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5ConstantCache{…})
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_utils.jl:34
 [11] perform_step!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5ConstantCache{…}, repeat_step::Bool)
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_perform_step.jl:774
 [12] perform_step!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5ConstantCache{…})
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_perform_step.jl:771
 [13] solve!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…})
    @ OrdinaryDiffEqCore .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:610
 [14] #__solve#62
    @ .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:7 [inlined]
 [15] __solve
    @ .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:1 [inlined]
 [16] #solve_call#36
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:657 [inlined]
 [17] solve_call
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:614 [inlined]
 [18] #solve_up#45
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1211 [inlined]
 [19] solve_up
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1188 [inlined]
 [20] #solve#43
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1083 [inlined]
 [21] solve(prob::ODEProblem{…}, args::ESERK5{…})
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1073
 [22] top-level scope
    @ repex.jl:9

For solve(problem_mut, ESERK5()):

ERROR: DimensionError:  and s^-1 are not dimensionally compatible.
Stacktrace:
  [1] #s104#131
    @ .julia\packages\Unitful\sxiHA\src\conversion.jl:7 [inlined]
  [2] var"#s104#131"(::Any, s::Any, t::Any)
    @ Unitful .\none:0
  [3] (::Core.GeneratedFunctionStub)(::UInt64, ::LineNumberNode, ::Any, ::Vararg{Any})
    @ Core .\boot.jl:707
  [4] convfact(::Type{Float64}, s::Unitful.FreeUnits{(), NoDims, nothing}, t::Unitful.FreeUnits{(s^-1,), 𝐓^-1, nothing} )
    @ Unitful .julia\packages\Unitful\sxiHA\src\conversion.jl:54
  [5] uconvert(a::Unitful.FreeUnits{(), NoDims, nothing}, x::Quantity{Float64, 𝐓^-1, Unitful.FreeUnits{…}} )
    @ Unitful .julia\packages\Unitful\sxiHA\src\conversion.jl:102
  [6] convert(::Type{Float64}, y::Quantity{Float64, 𝐓^-1, Unitful.FreeUnits{(s^-1,), 𝐓^-1, nothing}}  )
    @ Unitful .julia\packages\Unitful\sxiHA\src\conversion.jl:167
  [7] setindex!
    @ .\genericmemory.jl:243 [inlined]
  [8] unsafe_copyto!(dest::Memory{Float64}, doffs::Int64, src::Memory{Quantity{…}}, soffs::Int64, n::Int64)
    @ Base .\genericmemory.jl:153
  [9] unsafe_copyto!
    @ .\genericmemory.jl:133 [inlined]
 [10] _copyto_impl!
    @ .\array.jl:308 [inlined]
 [11] copyto!
    @ .\array.jl:294 [inlined]
 [12] copyto!
    @ .\array.jl:319 [inlined]
 [13] fast_materialize!
    @ .julia\packages\FastBroadcast\wfdTr\src\FastBroadcast.jl:220 [inlined]
 [14] maxeig!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5Cache{…})
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_utils.jl:103
 [15] perform_step!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5Cache{…}, repeat_step::Bool)
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_perform_step.jl:853
 [16] perform_step!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…}, cache::OrdinaryDiffEqStabilizedRK.ESERK5Cache{…})
    @ OrdinaryDiffEqStabilizedRK .julia\packages\OrdinaryDiffEqStabilizedRK\tx1Qo\src\rkc_perform_step.jl:848
 [17] solve!(integrator::OrdinaryDiffEqCore.ODEIntegrator{…})
    @ OrdinaryDiffEqCore .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:610
 [18] #__solve#62
    @ .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:7 [inlined]
 [19] __solve
    @ .julia\packages\OrdinaryDiffEqCore\oFTse\src\solve.jl:1 [inlined]
 [20] #solve_call#36
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:657 [inlined]
 [21] solve_call
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:614 [inlined]
 [22] #solve_up#45
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1211 [inlined]
 [23] solve_up
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1188 [inlined]
 [24] #solve#43
    @ .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1083 [inlined]
 [25] solve(prob::ODEProblem{…}, args::ESERK5{…})
    @ DiffEqBase .julia\packages\DiffEqBase\0oXZq\src\solve.jl:1073
 [26] top-level scope
    @ repex.jl:10

Environment (please complete the following information):

• Output of using Pkg; Pkg.status()

Status `Project.toml`
  [6e4b80f9] BenchmarkTools v1.6.0
⌅ [f68482b8] Cthulhu v2.16.5
  [0c46a032] DifferentialEquations v7.16.1
  [31c24e10] Distributions v0.25.120
  [5ad8b20f] PhysicalConstants v0.2.4
⌃ [c3e4b0f8] Pluto v0.20.15
⌃ [731186ca] RecursiveArrayTools v3.37.0
⌃ [295af30f] Revise v3.8.0
  [1986cc42] Unitful v1.24.0

• Output of using Pkg; Pkg.status(; mode = PKGMODE_MANIFEST)

Status `Manifest.toml`
  [47edcb42] ADTypes v1.17.0
  [1520ce14] AbstractTrees v0.4.5
  [7d9f7c33] Accessors v0.1.42
  [79e6a3ab] Adapt v4.3.0
  [66dad0bd] AliasTables v1.1.3
  [a95523ee] AlmostBlockDiagonals v0.1.10
  [ec485272] ArnoldiMethod v0.4.0
  [4fba245c] ArrayInterface v7.19.0
  [4c555306] ArrayLayouts v1.11.2
  [aae01518] BandedMatrices v1.9.4
  [6e4b80f9] BenchmarkTools v1.6.0
  [d1d4a3ce] BitFlags v0.1.9
  [62783981] BitTwiddlingConvenienceFunctions v0.1.6
  [764a87c0] BoundaryValueDiffEq v5.18.0
  [7227322d] BoundaryValueDiffEqAscher v1.8.0
  [56b672f2] BoundaryValueDiffEqCore v1.11.1
  [85d9eb09] BoundaryValueDiffEqFIRK v1.9.0
  [1a22d4ce] BoundaryValueDiffEqMIRK v1.9.0
  [9255f1d6] BoundaryValueDiffEqMIRKN v1.8.0
  [ed55bfe0] BoundaryValueDiffEqShooting v1.9.0
  [70df07ce] BracketingNonlinearSolve v1.3.0
  [fa961155] CEnum v0.5.0
  [2a0fbf3d] CPUSummary v0.2.7
  [49dc2e85] Calculus v0.5.2
  [d360d2e6] ChainRulesCore v1.26.0
  [fb6a15b2] CloseOpenIntervals v0.1.13
⌅ [da1fd8a2] CodeTracking v1.3.9
  [944b1d66] CodecZlib v0.7.8
  [38540f10] CommonSolve v0.2.4
  [bbf7d656] CommonSubexpressions v0.3.1
  [f70d9fcc] CommonWorldInvalidations v1.0.0
  [34da2185] Compat v4.18.0
  [807dbc54] Compiler v0.1.1
  [b0b7db55] ComponentArrays v0.15.29
  [a33af91c] CompositionsBase v0.1.2
  [2569d6c7] ConcreteStructs v0.2.3
  [f0e56b4a] ConcurrentUtilities v2.5.0
  [5218b696] Configurations v0.17.6
  [187b0558] ConstructionBase v1.6.0
  [adafc99b] CpuId v0.3.1
⌅ [f68482b8] Cthulhu v2.16.5
  [9a962f9c] DataAPI v1.16.0
⌅ [864edb3b] DataStructures v0.18.22
  [e2d170a0] DataValueInterfaces v1.0.0
  [bcd4f6db] DelayDiffEq v5.58.0
⌃ [2b5f629d] DiffEqBase v6.183.0
  [459566f4] DiffEqCallbacks v4.9.0
  [77a26b50] DiffEqNoiseProcess v5.24.1
  [163ba53b] DiffResults v1.1.0
  [b552c78f] DiffRules v1.15.1
  [0c46a032] DifferentialEquations v7.16.1
⌃ [a0c0ee7d] DifferentiationInterface v0.7.4
  [b4f34e82] Distances v0.10.12
  [31c24e10] Distributions v0.25.120
  [ffbed154] DocStringExtensions v0.9.5
  [4e289a0a] EnumX v1.0.5
  [f151be2c] EnzymeCore v0.8.12
  [460bff9d] ExceptionUnwrapping v0.1.11
  [d4d017d3] ExponentialUtilities v1.27.0
  [e2ba6199] ExprTools v0.1.10
  [21656369] ExpressionExplorer v1.1.3
  [55351af7] ExproniconLite v0.10.14
  [9d29842c] FastAlmostBandedMatrices v0.1.5
  [7034ab61] FastBroadcast v0.3.5
  [9aa1b823] FastClosures v0.3.2
  [442a2c76] FastGaussQuadrature v1.0.2
  [a4df4552] FastPower v1.1.3
  [1a297f60] FillArrays v1.13.0
⌃ [6a86dc24] FiniteDiff v2.28.0
  [1eca21be] FoldingTrees v1.2.2
  [f6369f11] ForwardDiff v1.0.1
  [069b7b12] FunctionWrappers v1.1.3
  [77dc65aa] FunctionWrappersWrappers v0.1.3
  [d9f16b24] Functors v0.5.2
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  [c145ed77] GenericSchur v0.5.5
  [828d9ff0] GracefulPkg v2.3.0
⌃ [86223c79] Graphs v1.13.0
  [cd3eb016] HTTP v1.10.17
  [34004b35] HypergeometricFunctions v0.3.28
  [ac1192a8] HypertextLiteral v0.9.5
  [615f187c] IfElse v0.1.1
  [d25df0c9] Inflate v0.1.5
  [3587e190] InverseFunctions v0.1.17
  [92d709cd] IrrationalConstants v0.2.4
  [82899510] IteratorInterfaceExtensions v1.0.0
  [692b3bcd] JLLWrappers v1.7.1
  [682c06a0] JSON v0.21.4
  [ae98c720] Jieko v0.2.1
⌃ [aa1ae85d] JuliaInterpreter v0.10.3
⌅ [70703baa] JuliaSyntax v0.4.10
  [ccbc3e58] JumpProcesses v9.17.0
  [ba0b0d4f] Krylov v0.10.1
  [8ac3fa9e] LRUCache v1.6.2
  [10f19ff3] LayoutPointers v0.1.17
  [0e77f7df] LazilyInitializedFields v1.3.0
  [5078a376] LazyArrays v2.6.2
  [2d8b4e74] LevyArea v1.0.0
  [87fe0de2] LineSearch v0.1.4
  [d3d80556] LineSearches v7.4.0
⌃ [7ed4a6bd] LinearSolve v3.28.0
  [2ab3a3ac] LogExpFunctions v0.3.29
  [e6f89c97] LoggingExtras v1.1.0
⌃ [6f1432cf] LoweredCodeUtils v3.4.2
  [6c6e2e6c] MIMEs v1.1.0
  [1914dd2f] MacroTools v0.5.16
  [36869731] Malt v1.2.0
  [d125e4d3] ManualMemory v0.1.8
  [a3b82374] MatrixFactorizations v3.0.1
  [bb5d69b7] MaybeInplace v0.1.4
  [739be429] MbedTLS v1.1.9
  [eff96d63] Measurements v2.14.0
  [e1d29d7a] Missings v1.2.0
  [2e0e35c7] Moshi v0.3.7
  [99f44e22] MsgPack v1.2.1
  [46d2c3a1] MuladdMacro v0.2.4
  [d41bc354] NLSolversBase v7.10.0
  [2774e3e8] NLsolve v4.5.1
  [77ba4419] NaNMath v1.1.3
  [8913a72c] NonlinearSolve v4.10.0
  [be0214bd] NonlinearSolveBase v1.14.0
  [5959db7a] NonlinearSolveFirstOrder v1.7.0
  [9a2c21bd] NonlinearSolveQuasiNewton v1.8.0
  [26075421] NonlinearSolveSpectralMethods v1.3.0
  [4d8831e6] OpenSSL v1.5.0
  [429524aa] Optim v1.13.2
  [bac558e1] OrderedCollections v1.8.1
  [1dea7af3] OrdinaryDiffEq v6.101.0
  [89bda076] OrdinaryDiffEqAdamsBashforthMoulton v1.5.0
  [6ad6398a] OrdinaryDiffEqBDF v1.10.1
  [bbf590c4] OrdinaryDiffEqCore v1.30.0
  [50262376] OrdinaryDiffEqDefault v1.8.0
  [4302a76b] OrdinaryDiffEqDifferentiation v1.14.0
  [9286f039] OrdinaryDiffEqExplicitRK v1.4.0
  [e0540318] OrdinaryDiffEqExponentialRK v1.8.0
  [becaefa8] OrdinaryDiffEqExtrapolation v1.8.0
  [5960d6e9] OrdinaryDiffEqFIRK v1.16.0
  [101fe9f7] OrdinaryDiffEqFeagin v1.4.0
  [d3585ca7] OrdinaryDiffEqFunctionMap v1.5.0
  [d28bc4f8] OrdinaryDiffEqHighOrderRK v1.5.0
  [9f002381] OrdinaryDiffEqIMEXMultistep v1.7.0
  [521117fe] OrdinaryDiffEqLinear v1.6.0
  [1344f307] OrdinaryDiffEqLowOrderRK v1.6.0
  [b0944070] OrdinaryDiffEqLowStorageRK v1.6.0
  [127b3ac7] OrdinaryDiffEqNonlinearSolve v1.14.1
  [c9986a66] OrdinaryDiffEqNordsieck v1.4.0
  [5dd0a6cf] OrdinaryDiffEqPDIRK v1.6.0
  [5b33eab2] OrdinaryDiffEqPRK v1.4.0
  [04162be5] OrdinaryDiffEqQPRK v1.4.0
  [af6ede74] OrdinaryDiffEqRKN v1.5.0
  [43230ef6] OrdinaryDiffEqRosenbrock v1.16.1
  [2d112036] OrdinaryDiffEqSDIRK v1.7.0
  [669c94d9] OrdinaryDiffEqSSPRK v1.6.0
  [e3e12d00] OrdinaryDiffEqStabilizedIRK v1.6.0
  [358294b1] OrdinaryDiffEqStabilizedRK v1.4.0
  [fa646aed] OrdinaryDiffEqSymplecticRK v1.7.0
  [b1df2697] OrdinaryDiffEqTsit5 v1.5.0
  [79d7bb75] OrdinaryDiffEqVerner v1.6.0
  [90014a1f] PDMats v0.11.35
  [d96e819e] Parameters v0.12.3
  [69de0a69] Parsers v2.8.3
  [5ad8b20f] PhysicalConstants v0.2.4
⌃ [c3e4b0f8] Pluto v0.20.15
  [72656b73] PlutoDependencyExplorer v1.2.2
  [e409e4f3] PoissonRandom v0.4.6
  [f517fe37] Polyester v0.7.18
  [1d0040c9] PolyesterWeave v0.2.2
  [85a6dd25] PositiveFactorizations v0.2.4
⌃ [d236fae5] PreallocationTools v0.4.31
  [91cefc8d] PrecompileSignatures v3.0.3
⌅ [aea7be01] PrecompileTools v1.2.1
  [21216c6a] Preferences v1.5.0
  [43287f4e] PtrArrays v1.3.0
  [1fd47b50] QuadGK v2.11.2
  [74087812] Random123 v1.7.1
  [e6cf234a] RandomNumbers v1.6.0
  [3cdcf5f2] RecipesBase v1.3.4
⌃ [731186ca] RecursiveArrayTools v3.37.0
  [189a3867] Reexport v1.2.2
  [2792f1a3] RegistryInstances v0.1.0
  [05181044] RelocatableFolders v1.0.1
  [ae029012] Requires v1.3.1
  [ae5879a3] ResettableStacks v1.1.1
⌃ [295af30f] Revise v3.8.0
  [79098fc4] Rmath v0.8.0
⌃ [f2b01f46] Roots v2.2.8
  [7e49a35a] RuntimeGeneratedFunctions v0.5.15
  [94e857df] SIMDTypes v0.1.0
⌃ [0bca4576] SciMLBase v2.108.0
  [19f34311] SciMLJacobianOperators v0.1.8
  [c0aeaf25] SciMLOperators v1.5.0
  [53ae85a6] SciMLStructures v1.7.0
  [6c6a2e73] Scratch v1.3.0
  [efcf1570] Setfield v1.1.2
  [777ac1f9] SimpleBufferStream v1.2.0
  [727e6d20] SimpleNonlinearSolve v2.7.0
  [699a6c99] SimpleTraits v0.9.5
  [ce78b400] SimpleUnPack v1.1.0
  [a2af1166] SortingAlgorithms v1.2.2
  [9f842d2f] SparseConnectivityTracer v1.0.0
  [0a514795] SparseMatrixColorings v0.4.21
  [276daf66] SpecialFunctions v2.5.1
  [aedffcd0] Static v1.2.0
  [0d7ed370] StaticArrayInterface v1.8.0
  [90137ffa] StaticArrays v1.9.14
  [1e83bf80] StaticArraysCore v1.4.3
  [10745b16] Statistics v1.11.1
  [82ae8749] StatsAPI v1.7.1
  [2913bbd2] StatsBase v0.34.6
  [4c63d2b9] StatsFuns v1.5.0
  [9672c7b4] SteadyStateDiffEq v2.5.0
  [789caeaf] StochasticDiffEq v6.81.0
⌃ [7792a7ef] StrideArraysCore v0.5.7
  [c3572dad] Sundials v4.28.0
  [2efcf032] SymbolicIndexingInterface v0.3.43
  [3783bdb8] TableTraits v1.0.1
  [bd369af6] Tables v1.12.1
  [8290d209] ThreadingUtilities v0.5.5
  [a759f4b9] TimerOutputs v0.5.29
  [3bb67fe8] TranscodingStreams v0.11.3
  [410a4b4d] Tricks v0.1.12
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  [5c2747f8] URIs v1.6.1
  [3a884ed6] UnPack v1.0.2
  [1986cc42] Unitful v1.24.0
  [b8c1c048] WidthLimitedIO v1.0.1
  [1d5cc7b8] IntelOpenMP_jll v2025.2.0+0
  [856f044c] MKL_jll v2025.2.0+0
  [458c3c95] OpenSSL_jll v3.5.2+0
  [efe28fd5] OpenSpecFun_jll v0.5.6+0
  [f50d1b31] Rmath_jll v0.5.1+0
⌅ [fb77eaff] Sundials_jll v5.2.3+0
  [1317d2d5] oneTBB_jll v2022.0.0+0
  [0dad84c5] ArgTools v1.1.2
  [56f22d72] Artifacts v1.11.0
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  [ade2ca70] Dates v1.11.0
  [8ba89e20] Distributed v1.11.0
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  [7b1f6079] FileWatching v1.11.0
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  [b77e0a4c] InteractiveUtils v1.11.0
  [4af54fe1] LazyArtifacts v1.11.0
  [b27032c2] LibCURL v0.6.4
  [76f85450] LibGit2 v1.11.0
  [8f399da3] Libdl v1.11.0
  [37e2e46d] LinearAlgebra v1.11.0
  [56ddb016] Logging v1.11.0
  [d6f4376e] Markdown v1.11.0
  [a63ad114] Mmap v1.11.0
  [ca575930] NetworkOptions v1.2.0
  [44cfe95a] Pkg v1.11.0
  [de0858da] Printf v1.11.0
  [9abbd945] Profile v1.11.0
  [3fa0cd96] REPL v1.11.0
  [9a3f8284] Random v1.11.0
  [ea8e919c] SHA v0.7.0
  [9e88b42a] Serialization v1.11.0
  [1a1011a3] SharedArrays v1.11.0
  [6462fe0b] Sockets v1.11.0
  [2f01184e] SparseArrays v1.11.0
  [f489334b] StyledStrings v1.11.0
  [4607b0f0] SuiteSparse
  [fa267f1f] TOML v1.0.3
  [a4e569a6] Tar v1.10.0
  [8dfed614] Test v1.11.0
  [cf7118a7] UUIDs v1.11.0
  [4ec0a83e] Unicode v1.11.0
  [e66e0078] CompilerSupportLibraries_jll v1.1.1+0
  [deac9b47] LibCURL_jll v8.6.0+0
  [e37daf67] LibGit2_jll v1.7.2+0
  [29816b5a] LibSSH2_jll v1.11.0+1
  [c8ffd9c3] MbedTLS_jll v2.28.6+0
  [14a3606d] MozillaCACerts_jll v2023.12.12
  [4536629a] OpenBLAS_jll v0.3.27+1
  [05823500] OpenLibm_jll v0.8.5+0
  [bea87d4a] SuiteSparse_jll v7.7.0+0
  [83775a58] Zlib_jll v1.2.13+1
  [8e850b90] libblastrampoline_jll v5.11.0+0
  [8e850ede] nghttp2_jll v1.59.0+0
  [3f19e933] p7zip_jll v17.4.0+2

• Output of versioninfo()

Julia Version 1.11.5
Commit 760b2e5b73 (2025-04-14 06:53 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 14 × Intel(R) Core(TM) Ultra 7 165U
  WORD_SIZE: 64
  LLVM: libLLVM-16.0.6 (ORCJIT, alderlake)
Threads: 1 default, 0 interactive, 1 GC (on 14 virtual cores)
Environment:
  JULIA_EDITOR = code
  JULIA_VSCODE_REPL = 1

Additional context

For the mutable example, I notice that the type of fsalfirst is rateType (in this case Vector{Quantity{Float64, 𝐓 ^-1, FreeUnits{(s^-1,), 𝐓 ^-1, nothing}}}), whereas the array z is of type uType (Vector{Float64}). This does of course cause trouble when the contents of fsalfirst is copied into z:

OrdinaryDiffEq.jl/lib/OrdinaryDiffEqStabilizedRK/src/rkc_utils.jl

Line 103 in ad277be

@.. broadcast=false z=fsalfirst

The constant example seems to have a similar dimension problem.

[ChrisRackauckas]

Generally I'd suggest just doing DynamicQuantities.jl instead of unitful.