BoundsError in following mwe

[ArbitRandomUser]

using Enzyme
using LinearAlgebra

const Z = [1.0  0.0;
           0.0 -1.0]

const X = [0.0    1.0;
           1          0]

const Δt = 0.5

function getp_at_t(p,t)
    p[min(floor(Int,(t/Δt))+1,length(p))]
end


function dfunc(du,u,p,t)
    amp = p[min(floor(Int,(t/Δt))+1,length(p))]
    mul!(du,Z,u,1.0,0.0)
    mul!(du,X,u,amp,1.0)
    nothing
end


u0 = rand(2)
du0 = zero(u0)
p = rand(10)

der_u0 = make_zero(u0)
der_du0 = make_zero(du0)
der_p = make_zero(p)


autodiff(Reverse,dfunc,Const,Duplicated(du0,der_du0),Duplicated(u0,der_u0),Duplicated(p,der_p),Const(0.1))

gives the output

julia> autodiff(Reverse,dfunc,Const,Duplicated(du0,der_du0),Duplicated(u0,der_u0),Duplicated(p,der_p),Const(0.1))
ERROR: BoundsError: attempt to access 10-element Vector{Float64} at index [1]
Stacktrace:
  [1] getindex
    @ ./essentials.jl:13 [inlined]
  [2] dfunc
    @ ~/complexmwe/mwe.jl:18 [inlined]
  [3] diffejulia_dfunc_1755wrap
    @ ~/complexmwe/mwe.jl:0
  [4] macro expansion
    @ ~/.julia/packages/Enzyme/06ueh/src/compiler.jl:8298 [inlined]
  [5] enzyme_call
    @ ~/.julia/packages/Enzyme/06ueh/src/compiler.jl:7861 [inlined]
  [6] CombinedAdjointThunk
    @ ~/.julia/packages/Enzyme/06ueh/src/compiler.jl:7634 [inlined]
  [7] autodiff
    @ ~/.julia/packages/Enzyme/06ueh/src/Enzyme.jl:491 [inlined]
  [8] autodiff(::ReverseMode{…}, ::typeof(dfunc), ::Type{…}, ::Duplicated{…}, ::Duplicated{…}, ::Duplicated{…}, ::Const{…})
    @ Enzyme ~/.julia/packages/Enzyme/06ueh/src/Enzyme.jl:512
  [9] top-level scope
    @ ~/complexmwe/mwe.jl:34
 [10] eval
    @ ./boot.jl:385 [inlined]
Some type information was truncated. Use `show(err)` to see complete types.

gives same error on 0.12.6 , 0.13.14 .

enzyme 0.12.5 would prompt to enable runtime activity,

[wsmoses]

the culprit is the attributor, naturally

[wsmoses]

some slight reductions:

wmoses@beast:~/git/Enzyme.jl ((HEAD detached at origin/main)) $ cat b.jl 


using Enzyme
using LinearAlgebra

# Enzyme.Compiler.DumpPostWrap[] = true

# Enzyme.Compiler.DumpPostOpt[] = true

const Z = [1.0  0.0;
           0.0 -1.0]

const X = [0.0    1.0;
           1          0]

function dfunc(du,u,p,t)
    amp = p[t]
    mul!(du,Z,u,1.0,0.0)
    mul!(du,X,u,amp,1.0)
    nothing
end


u0 = rand(2)
du0 = zero(u0)
p = rand(10)

der_u0 = make_zero(u0)
der_du0 = make_zero(du0)
der_p = make_zero(p)

@show p, der_p

dfunc(du0, u0, p, 1)

autodiff(Reverse,dfunc,Const,Duplicated(du0,der_du0),Duplicated(u0,der_u0),Duplicated(p,der_p),Const(1))
wmoses@beast:~/git/Enzyme.jl ((HEAD detached at origin/main)) $ 

[wsmoses]

okay we will work arouond this in the next jll bump with this fix: EnzymeAD/Enzyme#2166

[wsmoses]

Fix has landed