GNU bug report logs - #44943
28.0.50; defvar may return INITVALUE and overwrite symbol's value

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; defvar may return INITVALUE and overwrite symbol's value
Date: Sun, 29 Nov 2020 19:49:22 +0900

When evaluate below codes, I get unexpected result.

(defvar test 1)

-> test

It is expected.

(defvar test 2)

-> 2

It should return 'test'.

(symbol-value 'test)

-> 2

It should return 1.

-- 
Kazuhiro Ito

Message #8 received at 44943 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>
Cc: 44943 <at> debbugs.gnu.org
Subject: Re: bug#44943: 28.0.50; defvar may return INITVALUE and overwrite
 symbol's value
Date: Sun, 29 Nov 2020 12:00:49 +0100

Kazuhiro Ito <kzhr <at> d1.dion.ne.jp> writes:

> When evaluate below codes, I get unexpected result.
>
> (defvar test 1)
>
> -> test
>
> It is expected.
>
> (defvar test 2)
>
> -> 2
>
> It should return 'test'.
>
> (symbol-value 'test)
>
> -> 2
>
> It should return 1.

When you say "evaluate", what do you mean?  Doing `C-x C-e' after the
form?  If it's the latter, then the doc string explains what's
happening (and this is new behaviour in Emacs 28):

----

C-x C-e runs the command eval-last-sexp (found in global-map), which
is an interactive compiled Lisp function in ‘elisp-mode.el’.

It is bound to C-x C-e.

(eval-last-sexp EVAL-LAST-SEXP-ARG-INTERNAL)

  Probably introduced at or before Emacs version 24.4.

Evaluate sexp before point; print value in the echo area.
Interactively, with a non ‘-’ prefix argument, print output into
current buffer.

This commands handles ‘defvar’, ‘defcustom’ and ‘defface’ the
same way that ‘eval-defun’ does.  See the doc string of that
function for details.


-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #15 received at 44943-done <at> debbugs.gnu.org (full text, mbox):

From: Kazuhiro Ito <kzhr <at> d1.dion.ne.jp>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 44943-done <at> debbugs.gnu.org
Subject: Re: bug#44943: 28.0.50;
 defvar may return INITVALUE and overwrite symbol's value
Date: Sun, 29 Nov 2020 21:06:26 +0900

> > When evaluate below codes, I get unexpected result.
> >
> > (defvar test 1)
> >
> > -> test
> >
> > It is expected.
> >
> > (defvar test 2)
> >
> > -> 2
> >
> > It should return 'test'.
> >
> > (symbol-value 'test)
> >
> > -> 2
> >
> > It should return 1.
> 
> When you say "evaluate", what do you mean?  Doing `C-x C-e' after the
> form?  If it's the latter, then the doc string explains what's
> happening (and this is new behaviour in Emacs 28):

I meant C-j in *scratch* buffer (eval-print-last-sexp) and `C-x C-e'.
They return the same result.  I didn't notice the change of
eval-last-sexp, sorry.  I'm closing this issue.

-- 
Kazuhiro Ito

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