Configurations errors when using e as the variable name. 🤷

[schlichtanders]

I just build a tiny test example for Configurations which unforunately breaks.
EDIT: simplified the example further

using Configurations: @option, from_dict

@option struct OptionFails
    d::Union{Nothing, String} = nothing
    e::String
end

from_dict(OptionFails, Dict("d" => nothing, "e" => "hi"))

throws

ERROR: MethodError: no method matching haskey(::Nothing, ::String)

Closest candidates are:
  haskey(::LibGit2.CachedCredentials, ::Any)
   @ LibGit2 ~/.julia/juliaup/julia-1.10.2+0.x64.linux.gnu/share/julia/stdlib/v1.10/LibGit2/src/types.jl:1309
  haskey(::LibGit2.GitTree, ::AbstractString)
   @ LibGit2 ~/.julia/juliaup/julia-1.10.2+0.x64.linux.gnu/share/julia/stdlib/v1.10/LibGit2/src/tree.jl:192
  haskey(::RegexMatch, ::Union{AbstractString, Symbol})
   @ Base regex.jl:279
  ...

Stacktrace:
 [1] macro expansion
   @ ./essentials.jl:0 [inlined]
 [2] from_dict_specialize(::Type{MyC8}, d::Dict{String, Union{Nothing, String}})
   @ Main ~/.julia/packages/Configurations/Yxczn/src/codegen.jl:362
 [3] from_dict(::Type{MyC8}, d::Dict{String, Union{Nothing, String}}; kw::@Kwargs{})
   @ Configurations ~/.julia/packages/Configurations/Yxczn/src/from_dict.jl:46
 [4] from_dict(::Type{MyC8}, d::Dict{String, Union{Nothing, String}})
   @ Configurations ~/.julia/packages/Configurations/Yxczn/src/from_dict.jl:33
 [5] top-level scope
   @ REPL[30]:1

Suprisingly just changing the variable names makes it work

@option struct OptionWorks
    a::Union{Nothing, String} = nothing
    b::String
end
from_dict(OptionWorks, Dict("a" => nothing, "b" => "hi"))