Home/ Questions/Q 858109
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-15T08:29:55+00:00

I’m trying to learn common lisp currently and I’ve been using sbcl (I hope

  • 0

I’m trying to learn common lisp currently and I’ve been using sbcl (I hope that’s a decent implementation choice.)

Coming from ruby and irb I find the automatic moved to a debugger on every mistake a little annoying at this time. Is there a way to turn it off temporarily when I’m playing around.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Common Lisp has a variable *debugger-hook*, which can be bound/set to a function.

    * (aref "123" 10)

debugger invoked on a SB-INT:INVALID-ARRAY-INDEX-ERROR:
  Index 10 out of bounds for (SIMPLE-ARRAY CHARACTER
                              (3)), should be nonnegative and <3.

Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit debugger, returning to top level.

(SB-INT:INVALID-ARRAY-INDEX-ERROR "123" 10 3 NIL)
0] 0

* (defun debug-ignore (c h) (declare (ignore h)) (print c) (abort))

DEBUG-IGNORE
* (setf *debugger-hook* #'debug-ignore)

#<FUNCTION DEBUG-IGNORE>
* (aref "123" 10)

#<SB-INT:INVALID-ARRAY-INDEX-ERROR {1002A661D1}>
*
    • 0