I believe the bug can be blamed on "nth".

Using "nth", I make a function which should be identity on natural
numbers:

Clojure 1.2.1
user=> (defn ident [n] (nth (iterate inc 0) n))
#'user/ident

And it works, for reasonable size numbers:

user=> (ident 12345)
12345
user=> (ident 7654321)
7654321

But, with a ridiculously huge number...

user=> (ident 9876543210)
1286608618

...something goes wrong.

Also, when I replace "nth" in my code (in the top post) with "mth",
then it works.  Here's "mth":

user=> (defn mth [seq m] (if (zero? m) (first seq) (recur (rest seq)
(dec m))))
#'user/mth
user=> (mth (iterate inc 0) 123456)
123456
user=> (mth (iterate inc 0) 9876543210)
9876543210


Of course, "mth" is godawful slow.

I guess nobody wanted to find the 9876543210th element of a sequence,
until this wanking dilettante came along!

cheers,
George

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