This tends to be more important in dynamic languages where "the outputs" are often hilariously far from what is reasonable to expect. Most of my experience wit

This tends to be more important in dynamic languages where "the outputs" are often hilariously far from what is reasonable to expect. Most of my experience with dynamic language programming is far from what you describe above. About the only place where I've encountered the like is with Javascript. https://archive.org/details/wat_destroyallsoftware https://archive.org/details/wat_destroyallsoftware I once experienced "magic" jumps in the debugger in Smalltalk, but that was because of some liberties taken with custom methods implemented in C, or because of missing_method style metaprogramming. (#doesNotUndedrstand: in Smalltalk)