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From: Alan Mackenzie <acm@muc.de>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: Can't M-x compile-defun `edebug' because dynamic variables are falsely taken as lexical.
Date: Tue, 3 Jan 2017 21:32:28 +0000	[thread overview]
Message-ID: <20170103213228.GB2085@acm.fritz.box> (raw)
In-Reply-To: <jwv37h0dmek.fsf-monnier+gmane.emacs.devel@gnu.org>

Hello, Stefan.

On Tue, Jan 03, 2017 at 01:35:19PM -0500, Stefan Monnier wrote:
> > I want to M-x compile-defun the function `edebug'.

> Looks like `compile-defun` is another function that needs to be changed
> to use `eval-sexp-add-defvars`.

It looks like you've already done that, possibly on 2015-10-29.  Looking
at the source (now I know what to look for), eval-sexp-add-defvars is
also in Emacs 25.1's source for compile-defun.  So, something else has
gone wrong.....

I think the something else might be in Fdefvar.  At its outermost level
Fdefvar contains:

###############################################
  (Lisp_Object args)
{
  Lisp_Object sym, tem, tail;

  sym = XCAR (args);
  tail = XCDR (args);

  if (CONSP (tail))
    {
......
      /* Do it before evaluating the initial value, for self-references.  */
      XSYMBOL (sym)->declared_special = 1;
......
    }
###############################################

, so the question becomes why is setting the declared_special flag done
inside the "if (CONSP (tail))" rather than outside?  I.e. why is it only
done when a variable has an initialisation?

>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).



  reply	other threads:[~2017-01-03 21:32 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-03 14:14 Can't M-x compile-defun `edebug' because dynamic variables are falsely taken as lexical Alan Mackenzie
2017-01-03 18:35 ` Stefan Monnier
2017-01-03 21:32   ` Alan Mackenzie [this message]
2017-01-03 21:48     ` Stefan Monnier
2017-01-04 13:39       ` Alan Mackenzie
2017-01-04 15:23         ` Stefan Monnier
2017-01-04 20:04           ` Alan Mackenzie
2017-01-04 21:49             ` Stefan Monnier
2017-01-04 22:02               ` Alan Mackenzie
2017-01-04 22:26                 ` Stefan Monnier
2017-01-04 22:44                   ` Drew Adams
2017-01-05 10:54                   ` Alan Mackenzie
2020-02-13 16:42             ` Drew Adams
2020-02-13 20:02               ` Stefan Monnier
2020-02-13 20:43                 ` Drew Adams
2020-02-13 22:09                   ` Stefan Monnier
2020-02-14  1:07                     ` Drew Adams
2020-02-14  2:24                       ` Stefan Monnier
2020-02-14 17:25                         ` Drew Adams
2020-02-14 19:19                           ` Stefan Monnier
2020-02-17 18:23                           ` Drew Adams
2020-02-13 22:11                   ` Stefan Monnier
2020-02-14  1:13                     ` Drew Adams

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