问题
Trying to debug using the stepper in Dr. Racket but as soon as the error pops up the stepper's buttons get turned off. Any way to step back after an error to better see where the bug is?
回答1:
Stepper's author here: as soegaard says, this sounds like a bug, but it will be hard to fix without a sequence of steps to help reproduce. FWIW, basic stepping in and around runtime & syntax bugs is a part of the standard release checks.
来源：https://stackoverflow.com/questions/60962884/stepping-back-in-drracket-stepper