6 The DBG Package

debug-print-length

Variable

Summary

Controls the number of object components printed in debugger output.

Package

dbg

Initial Value

40

Description

This variable is used to control the number of components of an object which are printed during output from the debugger. If its value is a positive integer then the components up to that number are printed. If it isnil then all the parts of an object are shown.

Examples

USER 83 > (setq dbg:*debug-print-length* 3)

3 
USER 84 > (aref
             '(1 2 3 4 "Jenny" "cottage" "door")
              2)

Error: (1 2 3 4 Jenny cottage door) must be
      an array
  1 (abort) return to top loop level 0.

Type :c followed by a number to proceed

USER 85 : 1 > :v
Call to ARRAY-ACCESS  :
Arg 0 (ARRAY): (1 2 3 ...)
Arg 1 (SUBSCRIPTS): (2)
Arg 2 (SET-P): NIL Arg 3 (VALUE): NIL

Notes
: *debug-print-length* is an extension to Common Lisp.