Re: How to highlight the offending line of code with edebug

[Eli Zaretskii <eliz@gnu.org>]

> From: Davin Pearson <davin.pearson@gmail.com>
> Date: Mon, 26 Dec 2022 13:54:39 +1300
> Cc: Michael Welsh Duggan <mwd@md5i.com>, emacs-devel@gnu.org
> 
> Consider the following code:
> 
> (progn
>   (defun foo ()
>     tomcat
>     )
>   (defun bar ()
>     (foo))
>   )
> 
> (bar)
> 
> When I instrument the foo and bar defuns for debugging by
> entering the command C-u M-C-x over the (progn ...) sexp and
> pressing the "n" key it comes with a black triangle next to
> tomcat, thus indicating that we are stepping through the foo
> function which is what I want.
> 
> The error message is this:
> 
> edebug-after: Symbol’s value as variable is void: tomcat
> 
> This is all good.  What I need to know is how to instrument every
> function for debugging.  I tried the following command at
> the top of my ~/.emacs file:
> 
> (progn
>   (setq edebug-on-error t)
>   (setq edebug-all-defs t))
> 
> When I put the above foo/bar/tomcat code in another file and I
> try to instrument the foo and bar methods for debugging, again
> with C-u M-C-x it comes back with the following error:
> 
> bar: Symbol’s value as variable is void: tomcat
> 
> Note that there is no black triangle next to the tomcat sexp,
> indicating we are using the debug module and not the edebug
> module, which is not what I want.
> 
> How do I get every function marked as instrumented?

According to the manual:

     If ‘edebug-all-defs’ is non-‘nil’, then the commands ‘eval-region’,
  ‘eval-current-buffer’, and ‘eval-buffer’ also instrument any definitions
  they evaluate.  Similarly, ‘edebug-all-forms’ controls whether
  ‘eval-region’ should instrument _any_ form, even non-defining forms.
  This doesn’t apply to loading or evaluations in the minibuffer.  The
  command ‘M-x edebug-all-forms’ toggles this option.

     Another command, ‘M-x edebug-eval-top-level-form’, is available to
  instrument any top-level form regardless of the values of
  ‘edebug-all-defs’ and ‘edebug-all-forms’.  ‘edebug-defun’ is an alias
  for ‘edebug-eval-top-level-form’.

I think this answers your questions.