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I'm working on a package that implements a REPL.? A typical interaction with the package might look like: > launch_REPL()REPL> 1 + 1[1] 2REPL> QDo you wish to save results? [y/n]REPL> ygoodbye ...> This is very similar to what happens when in `browser()`: the REPL evaluates arbitrary R user expressions and offers some additional commands. In order to implement functionality required for the REPL I must trace some functions in the base package.? The trace is removed `on.exit()` from th...