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Description
julia> function f(x,p)
grad = FiniteDiff.finite_difference_gradient(y -> sum(y.^3), x)
return grad .* p
end
f (generic function with 1 method)
julia> x,p = rand(3),rand(3);
julia> Zygote.gradient(p->sum(f(x,p)), p)[1]
ERROR: Mutating arrays is not supported -- called setindex!(Vector{Float64}, ...)
This error occurs when you ask Zygote to differentiate operations that change
the elements of arrays in place (e.g. setting values with x .= ...)
Possible fixes:
- avoid mutating operations (preferred)
- or read the documentation and solutions for this error
https://fluxml.ai/Zygote.jl/dev/limitations.html#Array-mutation-1
Stacktrace:
[1] error(s::String)
@ Base .\error.jl:33
[2] _throw_mutation_error(f::Function, args::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\lib\array.jl:70
[3] (::Zygote.var"#444#445"{Vector{Float64}})(#unused#::Nothing)
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\lib\array.jl:82
[4] (::Zygote.var"#2496#back#446"{Zygote.var"#444#445"{Vector{Float64}}})(Δ::Nothing)
@ Zygote C:\Users\Luffy\.julia\packages\ZygoteRules\AIbCs\src\adjoint.jl:67
[5] Pullback
@ C:\Users\Luffy\.julia\packages\FiniteDiff\KkXlb\src\gradients.jl:277 [inlined]
[6] (::typeof(∂(#finite_difference_gradient!#16)))(Δ::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[7] Pullback
@ C:\Users\Luffy\.julia\packages\FiniteDiff\KkXlb\src\gradients.jl:224 [inlined]
[8] (::typeof(∂(finite_difference_gradient!##kw)))(Δ::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[9] Pullback
@ C:\Users\Luffy\.julia\packages\FiniteDiff\KkXlb\src\gradients.jl:88 [inlined]
[10] (::typeof(∂(#finite_difference_gradient#12)))(Δ::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[11] Pullback
@ C:\Users\Luffy\.julia\packages\FiniteDiff\KkXlb\src\gradients.jl:70 [inlined]
[12] (::typeof(∂(finite_difference_gradient)))(Δ::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[13] Pullback
@ C:\Users\Luffy\.julia\packages\FiniteDiff\KkXlb\src\gradients.jl:70 [inlined]
[14] (::typeof(∂(finite_difference_gradient)))(Δ::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[15] Pullback
@ .\REPL[94]:2 [inlined]
[16] (::typeof(∂(f)))(Δ::FillArrays.Fill{Float64, 1, Tuple{Base.OneTo{Int64}}})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[17] Pullback
@ .\REPL[95]:1 [inlined]
[18] (::typeof(∂(#30)))(Δ::Float64)
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface2.jl:0
[19] (::Zygote.var"#60#61"{typeof(∂(#30))})(Δ::Float64)
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface.jl:41
[20] gradient(f::Function, args::Vector{Float64})
@ Zygote C:\Users\Luffy\.julia\packages\Zygote\IoW2g\src\compiler\interface.jl:76
[21] top-level scope
@ REPL[95]:1
[22] top-level scope
@ C:\Users\Luffy\.julia\packages\CUDA\DfvRa\src\initialization.jl:52
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