BoundsError: attempt to access 1-element Vector{Float64} at index [1]

[mhauru]

MWE:

module MWE

using SpecialFunctions: libopenspecfun
using Enzyme

function besseli(nu)
    kode = Int32(1)
    ai1, ai2 = Ref{Float64}(), Ref{Float64}()
    ae1, ae2 = Ref{Int32}(), Ref{Int32}()

    ccall((:zbesi_,libopenspecfun), Cvoid,
          (Ref{Float64}, Ref{Float64}, Ref{Float64}, Ref{Int32}, Ref{Int32},
           Ref{Float64}, Ref{Float64}, Ref{Int32}, Ref{Int32}),
           1.0, 0.0, 1.0, kode, 1,
           ai1, ai2, ae1, ae2)

    if ae2[] == 0
        return complex(0.0, nu)
    else
        throw(AssertionError())
    end
end

f(x) = besseli(x[1])

Enzyme.gradient(Enzyme.Forward, f, [1.0])

end

Output:

ERROR: LoadError: BoundsError: attempt to access 1-element Vector{Float64} at index [1]
Stacktrace:
  [1] getindex
    @ ./essentials.jl:13 [inlined]
  [2] f
    @ ~/projects/Enzyme-mwes/callinst_metadata/false_boundserror.jl:24 [inlined]
  [3] f
    @ ~/projects/Enzyme-mwes/callinst_metadata/false_boundserror.jl:0 [inlined]
  [4] fwddiffejulia_f_1512_inner_1wrap
    @ ~/projects/Enzyme-mwes/callinst_metadata/false_boundserror.jl:0
  [5] macro expansion
    @ ~/.julia/packages/Enzyme/qd8AI/src/compiler.jl:6606 [inlined]
  [6] enzyme_call
    @ ~/.julia/packages/Enzyme/qd8AI/src/compiler.jl:6207 [inlined]
  [7] ForwardModeThunk
    @ ~/.julia/packages/Enzyme/qd8AI/src/compiler.jl:6087 [inlined]
  [8] autodiff(::EnzymeCore.ForwardMode{EnzymeCore.FFIABI}, f::EnzymeCore.Const{typeof(Main.MWE.f)}, ::Type{EnzymeCore.BatchDuplicatedNoNeed}, args::EnzymeCore.BatchDuplicated{Vector{Float64}, 1})
    @ Enzyme ~/.julia/packages/Enzyme/qd8AI/src/Enzyme.jl:417
  [9] autodiff
    @ ~/.julia/packages/Enzyme/qd8AI/src/Enzyme.jl:321 [inlined]
 [10] gradient(::EnzymeCore.ForwardMode{EnzymeCore.FFIABI}, f::Function, x::Vector{Float64}; shadow::Tuple{Vector{Float64}})
    @ Enzyme ~/.julia/packages/Enzyme/qd8AI/src/Enzyme.jl:1064
 [11] gradient(::EnzymeCore.ForwardMode{EnzymeCore.FFIABI}, f::Function, x::Vector{Float64})
    @ Enzyme ~/.julia/packages/Enzyme/qd8AI/src/Enzyme.jl:1060
 [12] top-level scope
    @ ~/projects/Enzyme-mwes/callinst_metadata/false_boundserror.jl:26
in expression starting at /Users/mhauru/projects/Enzyme-mwes/callinst_metadata/false_boundserror.jl:1

[mhauru]

Fixed on main