Problem with the let binding.

[zigaLuksic]

While cleaning up the desugaring I had some trouble with the way the variables interact in the let case.
Turns out there is a problem:

let a = 1 and b = a + 1 in b

The above code complains about not knowing the variable a in the second part.

Also, using fold_right seems like an odd choice to me, as the following complains about not knowing the variable a first:

let x = 1 and y = x + 1 and a = 1 and b = a + 1

I tried switching it to fold_left but with no success.

[zigaLuksic]

Turns out the mistake was in my understanding of what let should do.