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Re: Feature Request: Auto-jumping to source file (.el) upon elisp error


From: Stefan Kamphausen
Subject: Re: Feature Request: Auto-jumping to source file (.el) upon elisp error
Date: Mon, 10 Dec 2007 10:59:49 +0100
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux)

Hi,

"Nordlöw" <address@hidden> writes:

> My highest priority Emacs feature request:
>
> When I encounter an error in elisp code I always wonder: Is there a
> way for Emacs to automatically split my elisp-error window in two and
> replace one of the windows with the relating source file and jump to
> position in that buffer where the error occurrred, like we are used to
> with practically all other languages/IDEs?

to me it seems that just the right thing happens.

For example, when I start a un-customized emacs:

shell> emacs -q

put the following into my scratch buffer:
----------------------------------------------------------------------
(defun produce-an-error ()
  (interactive)
  (goto-char))

(setq debug-on-error t)

(produce-an-error)
----------------------------------------------------------------------

and do a M-x eval-current-buffer I get a second window showing a
backtrace:
----------------------------------------------------------------------
Debugger entered--Lisp error: (wrong-number-of-arguments goto-char 0)
  (goto-char)
  produce-an-error()
  eval-current-buffer()
  call-interactively(eval-current-buffer)
  execute-extended-command(nil)
  call-interactively(execute-extended-command)
----------------------------------------------------------------------

The cute thing is that all known elisp functions (as opposed to
C-builtins) will be clickable to jump to the function definition.
Since I may be interested in various levels of the whole backtrace
this is way better than having the program decide which one will be my
point of interest.

Just my 2ct.

Regards,
Stefan
-- 
Stefan Kamphausen --- http://www.skamphausen.de
a blessed +42 regexp of confusion (weapon in hand)
You hit. The format string crumbles and turns to dust.


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