Failure in expanding derivative--Any[D(t)(f(v1(t))), D(t)(v2(t))]

[ven-k]

@component function DerOfFunc(; name)
  vars = @variables begin
    v0(t)
    v1(t)
    v2(t)
    v3(t)
  end
  eqs = Equation[
    v0 ~ 0
    v1 ~ f1(v0)
    v2 ~ D(v1)
    v3 ~ D(v2)
  ]
  return ODESystem(eqs, t, vars, []; systems = [], name)
end

@mtkbuild model = DerOfFunc()

Results in:

ERROR: BoundsError: attempt to access 1-element Vector{Any} at index [2] (see complete stacktrace)

complete stacktrace

┌ Info: Any[Differential(t)(f1(v0(t))), Differential(t)(v0(t))]
│   length(inner_args) = 2
│   i = 2
└   l = 2
[ Info: Any[true]
ERROR: BoundsError: attempt to access 1-element Vector{Any} at index [2]
Stacktrace:
  [1] getindex(A::Vector{Any}, i1::Int64)
    @ Base ./essentials.jl:13
  [2] expand_derivatives(O::SymbolicUtils.BasicSymbolic{Real}, simplify::Bool; occurrences::SymbolicUtils.BasicSymbolic{Real}) (repeats 4 times)
    @ Symbolics ~/.julia/dev/Symbolics/src/diff.jl:260
  [3] expand_derivatives(O::SymbolicUtils.BasicSymbolic{Real}, simplify::Bool; occurrences::Nothing)
    @ Symbolics ~/.julia/dev/Symbolics/src/diff.jl:260
  [4] expand_derivatives
    @ ~/.julia/dev/Symbolics/src/diff.jl:183 [inlined]
  [5] derivative(O::SymbolicUtils.BasicSymbolic{Real}, var::SymbolicUtils.BasicSymbolic{Real}; simplify::Bool)
    @ Symbolics ~/.julia/dev/Symbolics/src/diff.jl:448
  [6] derivative(O::SymbolicUtils.BasicSymbolic{Real}, var::SymbolicUtils.BasicSymbolic{Real})
    @ Symbolics ~/.julia/dev/Symbolics/src/diff.jl:444
  [7] eq_derivative!(ts::TearingState{…}, ieq::Int64; kwargs::@Kwargs{…})
    @ ModelingToolkit.StructuralTransformations ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/symbolics_tearing.jl:66
  [8] eq_derivative!
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/symbolics_tearing.jl:59 [inlined]
  [9] pantelides!(state::TearingState{…}; finalize::Bool, maxiters::Int64, kwargs::@Kwargs{…})
    @ ModelingToolkit.StructuralTransformations ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/pantelides.jl:186
 [10] pantelides!
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/pantelides.jl:127 [inlined]
 [11] dummy_derivative_graph!(state::TearingState{…}, jac::Function; state_priority::Function, log::Val{…}, kwargs::@Kwargs{…})
    @ ModelingToolkit.StructuralTransformations ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/partial_state_selection.jl:176
 [12] dummy_derivative_graph!
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/partial_state_selection.jl:172 [inlined]
 [13] #dummy_derivative#133
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/structural_transformation/symbolics_tearing.jl:686 [inlined]
 [14] _structural_simplify!(state::TearingState{…}, io::Nothing; simplify::Bool, check_consistency::Bool, fully_determined::Bool, warn_initialize_determined::Bool, dummy_derivative::Bool, kwargs::@Kwargs{…})
    @ ModelingToolkit ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systemstructure.jl:695
 [15] _structural_simplify!
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systemstructure.jl:675 [inlined]
 [16] structural_simplify!(state::TearingState{…}, io::Nothing; simplify::Bool, check_consistency::Bool, fully_determined::Bool, warn_initialize_determined::Bool, kwargs::@Kwargs{…})
    @ ModelingToolkit ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systemstructure.jl:635
 [17] __structural_simplify(sys::ODESystem, io::Nothing; simplify::Bool, kwargs::@Kwargs{…})
    @ ModelingToolkit ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systems.jl:94
 [18] __structural_simplify
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systems.jl:75 [inlined]
 [19] structural_simplify(sys::ODESystem, io::Nothing; simplify::Bool, split::Bool, allow_symbolic::Bool, allow_parameter::Bool, conservative::Bool, fully_determined::Bool, kwargs::@Kwargs{})
    @ ModelingToolkit ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systems.jl:33
 [20] structural_simplify
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systems.jl:28 [inlined]
 [21] structural_simplify(sys::ODESystem)
    @ ModelingToolkit ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/systems.jl:28
 [22] top-level scope
    @ ~/.julia/packages/ModelingToolkit/UXr3S/src/systems/abstractsystem.jl:2147
Some type information was truncated. Use `show(err)` to see complete types.

occurences fails to detect the signature of Any[D(t)(f(v1(t))), D(t)(v2(t))]

[ChrisRackauckas]

@mtkbuild does not exist in Symbolics. What's the actual issue here?