Are they meant to work? I could only find one meaning of them not working (issue 5778 <https://github.com/JuliaLang/julia/issues/5778>).
Here's an example:
julia> for i = 1:10
println(i)
end
1
2
3
4
5
6
7
8
9
10
julia> for i = 10:1
println(i)
end
julia>
