julia> begin
           Fs = Vector{Any}(undef, 2)
           i = 1
           while i <= 2
               Fs[i] = () -> i
               i += 1
           end
           Fs[1]()
       end
3

julia> @eval begin
           Fs = Vector{Any}(undef, 2)
           i = 1
           while i <= 2
               Fs[i] = () -> i
               i += 1
           end
           Fs[1]()
       end
┌ Warning: Assignment to `i` in soft scope is ambiguous because a global variable by the same name exists: `i` will be treated as a new local. Disambiguate by using `local i` to suppress this warning or `global i` to assign to the existing global variable.
└ @ REPL[24]:6
ERROR: UndefVarError: `i` not defined in local scope
Suggestion: check for an assignment to a local variable that shadows a global of the same name.
Stacktrace:
 [1] top-level scope
   @ REPL[24]:5
 [2] eval(m::Module, e::Any)
   @ Core ./boot.jl:430
 [3] top-level scope
   @ REPL[24]:1