On Fri, Dec 25, 2020 at 06:58:00AM +0100, Zelphir Kaltstahl wrote: > Hi Tim! > > I do not know the answer to your question, but I noticed something else: > trace-calls-to-procedure returns a procedure. That procedure and its > return value can be applied infinitely, it seems: [...] > Not sure if that helps :D Not the OP here, but look at what you've done: now I feel dizzy %-) Cheers - t