[joesb]

> If you don't know approximately what your functions are doing, you should never call them under any circumstances.

Then why would I use an editor that its main selling point is how easy it is to do that?

[calibraxis]

Well, if you really want to be on the safe side of that particular power vs. safety tradeoff, the repl code could run from (say) clojail. (https://github.com/flatland/clojail)