Top-level CommandToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version

:bt

Arguments:

The :bt command provides a quick way to scan the stack (contrast with :zoom). :bt has no abbreviation.

Here is the effect of the :bt command on the error when an attempt is made to evaluate foo which has no value. When the error occured, :zoom is printing all frames (:all t) so :bt does as well.

USER(23): foo
Error: Attempt to take the value of the unbound variable `FOO'.
[condition type: UNBOUND-VARIABLE]

[1] USER(24): :bt
Evaluation stack:

  EVAL <-
  TPL::READ-EVAL-PRINT-ONE-COMMAND <- 
  EXCL::READ-EVAL-PRINT-LOOP <-
  TPL::TOP-LEVEL-READ-EVAL-PRINT-LOOP1 <-
  TPL:TOP-LEVEL-READ-EVAL-PRINT-LOOP <- APPLY <-
  TPL:START-INTERACTIVE-TOP-LEVEL <- TPL::START-TOP-LEVEL <-
  EXCL::START-REBORN-LISP

See top-level.htm for more information on top-level commands.


Copyright (c) 1998-2009, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.1. This page was not revised from the 8.0 page.
Created 2009.7.29.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 8.1
Unrevised from 8.0 to 8.1.
8.0 version