You might be hitting a bug in Clojure 1.5.1 where it incorrectly attempts
to access elements in an empty stack trace, which I have seen occur.  This
should be fixed in Clojure 1.6.0 alpha releases:
http://dev.clojure.org/jira/browse/CLJ-1102

Andy


On Tue, Dec 17, 2013 at 9:14 AM, Dmitry Groshev <lambdadmi...@gmail.com>wrote:

> I've managed to get an NPE in print-stack-trace:
> https://gist.github.com/si14/e8d22913d21933d12ef1
>
> It seems highly counter-intuitive to me that this function can throw NPEs.
> I thought it's intended to be used in "catch" clauses; does it mean that I
> should wrap some catches in their own try-catches?
>
> Anderkent in #clojure suggested that the cause of this NPE is an exception
> without stacktrace, similar to ones discussed here:
> http://jawspeak.com/2010/05/26/hotspot-caused-exceptions-to-lose-their-stack-traces-in-production-and-the-fix/
>  If
> this is the case, the situation is even worse, because it's hard to foresee
> this optimization.
>
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