Replied: Unfortunately a REPL doesn't work with the ES6 target of shadow-cljs, so the way you can debug this is sprinkle printlns etc and the run test expressions from the command line. Meanwhile, I'm having thoughts of unifying the cherry and squint compiler code (perhaps cherry can depend on squint or vice versa or extract the code into a common project) so we don't have to port these commits. As I'm now working on the squint REPL, it becomes more and more annoying to have to port these commits so I think it's better go move into the unified direction.