Ah, sorry I missed that the first time around.

There's something similar going on with lazy-seq.

user=> (defn the-seq
  #_=>   ([] (the-seq 2))
  #_=>   ([a] (cons (* a a) (lazy-seq (the-seq (* a a))))))

user=> (def s (the-seq))
#'user/s
user=> (take 100 s)

ArithmeticException integer overflow  clojure.lang.Numbers.throwIntOverflow
(Numbers.java:1501)
user=> (take 100 s)
NullPointerException   clojure.lang.Numbers.ops (Numbers.java:1013)

I think in practice, you stop passing around the seq after the first
exception, you're encouraged not to hold on to heads of seqs, so this
shouldn't get triggered.

On Mon, Jun 13, 2016 at 4:54 PM Sebastian Oberhoff <
oberhoff.sebast...@gmail.com> wrote:

> What's surprising is that I executed a pure function twice in succession
> and got different results. Furthermore the second execution papers over an
> exception.
>
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