Diffractor forgets contents of structure?

[DavidKoplow]

I've been having an issue with Diffractor with TransformVariables.jl.
I have isolated the issue to this function. Diffractor it seems to forget the contents of the structure. Any idea what might be going wrong?

using Diffractor
@inline UNPACK(x, ::Val{f}) where {f} = getproperty(x, f)
@inline UNPACK(x::AbstractDict{Symbol}, ::Val{k}) where {k} = x[k]
@inline UNPACK(x::AbstractDict{<:AbstractString}, ::Val{k}) where {k} = x[string(k)]

macro UNPACK(args)
    args.head!=:(=) && error("Expression needs to be of form `a, b = c`")
    items, suitecase = args.args
    items = isa(items, Symbol) ? [items] : items.args
    suitecase_instance = gensym()
    kd = [:( $key = $UNPACK($suitecase_instance, Val{$(Expr(:quote, key))}()) ) for key in items]
    kdblock = Expr(:block, kd...)
    expr = quote
        local $suitecase_instance = $suitecase # handles if suitecase is not a variable but an expression
        $kdblock
        $suitecase_instance # return RHS of `=` as standard in Julia
    end
    esc(expr)
end

function er(tranforms)
    @UNPACK transformations = tranforms
    transformations
end
struct tr
    transformations
end
er(tr(1)) #Works
Diffractor.∂⃖recurse{1}()(er,tr(1)) #Doesn't Work

[Keno]

Fixed! For future reference, it's helpful to include the actual error message in the issue, just so I can be sure I see the same issue as you.

[DavidKoplow]

Amazing. Thank you.