Progress! Either rebooting, upgrading to 7.2, or something else caused DrRacket to start failing in the same way that raco does*. Now it feels like a normal problem I can solve using my normal techniques (of scattering printlns everywhere).
(* I was wrong when I said that "raco setup" was working - it wasn't.) -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.