Some DifferentialEquations.jl solvers fail when using ArrayPartition #44

julia> using DifferentialEquations,RecursiveArrayTools

julia> function lorenz(du,u,p,t)
           du[1] = 10.0*(u[2]-u[1])
           du[2] = u[1]*(28.0-u[3]) - u[2]
           du[3] = u[1]*u[2] - (8/3)*u[3]
       end
lorenz (generic function with 1 method)

julia> u0 = ArrayPartition([1.0,0.0],[0.0])
([1.0, 0.0], [0.0])

julia> tspan = (0.0,100.0)
(0.0, 100.0)

julia> prob = ODEProblem(lorenz,u0,tspan)
ODEProblem with uType ArrayPartition{Float64,Tuple{Array{Float64,1},Array{Float64,1}}} and tType Float64. In-place: true
timespan: (0.0, 100.0)
u0: [1.0, 0.0][0.0]

julia> sol = solve(prob,Tsit5());

julia> sol = solve(prob,AutoTsit5(Rosenbrock23()));
ERROR: MethodError: no method matching ldiv!(::LinearAlgebra.LU{Float64,Array{Float64,2}}, ::ArrayPartition{Float64,Tuple{Array{Float64,1},Array{Float64,1}}})
Closest candidates are:
  ldiv!(::LinearAlgebra.Transpose{#s561,#s560} where #s560<:LinearAlgebra.LowerTriangular where #s561, ::AbstractArray{T,1} where T) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/LinearAlgebra/src/triangular.jl:1217
  ldiv!(::LinearAlgebra.Transpose{#s561,#s560} where #s560<:LinearAlgebra.LowerTriangular where #s561, ::AbstractArray{T,1} where T, ::AbstractArray{T,1} where T) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/LinearAlgebra/src/triangular.jl:1201
  ldiv!(::LinearAlgebra.Transpose{#s561,#s560} where #s560<:LinearAlgebra.UnitLowerTriangular where #s561, ::AbstractArray{T,1} where T) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/LinearAlgebra/src/triangular.jl:1235
  ...