[MBlume]

The article makes it sound like the system was using eval (probably on a per-request basis, not just on start-up), and also like ceasing to use eval was pretty trivial once they realized eval was the problem. I'd be curious why they were using eval and what they were able to do instead.

[adityaathalye]

My thoughts exactly... off-label Eval usage.

That said, their little eval misadventure has alerted me to the details of how Clojure's eval works. I learned something today, thanks OP.