Broken on nightly due to type change

[oxinabox]

From the tests

julia> using TestEnv; TestEnv.activate(); using Symbolics, Diffractor

julia> @variables ω α β γ δ ϵ ζ η
       (x1, c1) = ∂⃖{3}()(exp, ω)
ERROR: TypeError: in opaque_closure_method, expected Int64, got a value of type Int32

Some of the types have been truncated in the stacktrace for improved reading. To emit complete information
in the stack trace, evaluate `TruncatedStacktraces.VERBOSE[] = true` and re-run the code.

Stacktrace:
 [1] ∂⃖
   @ ~/JuliaEnvs/Diffractor.jl/src/stage1/generated.jl:223 [inlined]
 [2] (::∂⃖{3})(f::typeof(exp), args::Num)
   @ Diffractor ~/JuliaEnvs/Diffractor.jl/src/stage1/generated.jl:66
 [3] top-level scope
   @ REPL[38]:2

Nightly first failed with this on
22 Feb https://github.com/JuliaDiff/Diffractor.jl/actions/runs/4229848232
and last worked on
21 Feb https://github.com/JuliaDiff/Diffractor.jl/actions/runs/4229848232

So there is a narrow window in what change could have caused this failure

[oscardssmith]

Is this the same as #122 or a separate breakage?

[oxinabox]

Pretty sure it is seperate, its a different error message.
And this breakage happened like over a month before that PR was merged

[oxinabox]

Pretty sure the cause was JuliaLang/julia#48739

so somewhere with nargs being passed in

[oxinabox]

Simpler test case:

julia> using Diffractor

julia> var"'" = Diffractor.PrimeDerivativeBack
Diffractor.PrimeDerivativeBack

julia> sin'''(1.0)

Needs at least 3rd derivative.
Interestingly once i put my current fix in 3rd works, but 4th segfaults...