bug#67429: 27.1; oddities with gdb-mode completion buffer

bug#67429: 27.1; oddities with gdb-mode completion buffer

[Eli Zaretskii]

> From: Bruno Haible <bruno@clisp.org>
> Date: Fri, 24 Nov 2023 10:06:25 +0100
> 
> I did 'M-x gdb-mode'

There's no such mode in Emacs, AFAICT.  How did you invoke it?

> and am trying to make use of gdb's
> symbol completion: enter part of the name of a symbol,
> and press <TAB>. Inside Emacs, I'm encountering two
> oddities:
> 
> 1) There is a buffer with possible completions, that
>    disappears after two seconds if I don't choose a
>    completion.
>    After this buffer disappears, my cursor is elsewhere.
>    I need an extra mouse interaction or key presses in
>    order to bring back the cursor, so that I can continue
>    typing the symbol's name.
> 
> 2) In some cases, the buffer does not disappear but stays
>    on screen. Why does it disappear in some cases but not
>    in others?

I tried to reproduce this during debugging from Emacs 27 and Emacs 29,
using "M-x gdb RET", and couldn't: I always get the completions window
stay put until I select some candidate.  At least in Emacs 29, I see
no issues with cursor position, either; in Emacs 27 I saw at least one
problem, but Emacs 27 is very old and no longer maintained (and
gdb-mi.el saw a lot of changes since Emacs 27).

So I suggest to post a complete recipe for reproducing the problem,
preferably starting from "emacs -Q".  I also recommend using Emacs
29.1, which is the latest version that is still being maintained.

Thanks.

bug#67429: 27.1; oddities with gdb-mode completion buffer

[Eli Zaretskii]

Btw, please in the future avoid sending such large attachments.  If
you can efficiently compress the file, please do; otherwise a URL of
some site from which to download the recording is best.

And a detailed recipe for reproduction is always better, TIA.

bug#67429: 27.1; oddities with gdb-mode completion buffer

[Bruno Haible]

Eli Zaretskii wrote:
> > I did 'M-x gdb-mode'
> 
> There's no such mode in Emacs, AFAICT.  How did you invoke it?

It was 'M-x gdb' in fact; I misremembered.

> I always get the completions window
> stay put until I select some candidate.

Interesting. I'll see if I can reproduce with Emacs 29...

Bruno

bug#67429: 27.1; oddities with gdb-mode completion buffer

[Bruno Haible]

Eli Zaretskii wrote:
> So I suggest to post a complete recipe for reproducing the problem,
> preferably starting from "emacs -Q".

The steps are:

0. Use Ubuntu 22.04 (which has emacs 27.1).
1. Unpack gettext-0.21.tar.gz.
2. cd gettext-0.21
3. CFLAGS=-ggdb ./configure --disable-shared && make
4. cd gettext-tools/src
5. cat > foo.vala <<\EOF
        primary_text.set_markup(
            "<span size=\"large\" weight=\"bold\">%s</span>".printf(_("Welcome to Shotwell!")));
EOF
6. ./xgettext -o - foo.vala
7. emacs
8. Resize the window to width 1265, height 813 or 815 (according to xwininfo).
9. M-x gdb RET
   gdb -i=mi xgettext RET
10. break main
11. break remember_a_message
12. run -o - foo.vala
13. continue
14. where
15. print current TAB TAB

> I also recommend using Emacs
> 29.1, which is the latest version that is still being maintained.

Indeed, when I start the recipe above with

  0. Use Ubuntu 23.10 (which has emacs 29.1).

the completion windows stays open. No bug there.

You can close the ticket.

Thanks for your help in this investigation.

Bruno

bug#67429: 27.1; oddities with gdb-mode completion buffer

[Eli Zaretskii]

> From: Bruno Haible <bruno@clisp.org>
> Cc: 67429@debbugs.gnu.org
> Date: Fri, 24 Nov 2023 14:59:07 +0100
> 
> Eli Zaretskii wrote:
> > So I suggest to post a complete recipe for reproducing the problem,
> > preferably starting from "emacs -Q".
> 
> The steps are:
> 
> 0. Use Ubuntu 22.04 (which has emacs 27.1).
> 1. Unpack gettext-0.21.tar.gz.
> 2. cd gettext-0.21
> 3. CFLAGS=-ggdb ./configure --disable-shared && make
> 4. cd gettext-tools/src
> 5. cat > foo.vala <<\EOF
>         primary_text.set_markup(
>             "<span size=\"large\" weight=\"bold\">%s</span>".printf(_("Welcome to Shotwell!")));
> EOF
> 6. ./xgettext -o - foo.vala
> 7. emacs
> 8. Resize the window to width 1265, height 813 or 815 (according to xwininfo).
> 9. M-x gdb RET
>    gdb -i=mi xgettext RET
> 10. break main
> 11. break remember_a_message
> 12. run -o - foo.vala
> 13. continue
> 14. where
> 15. print current TAB TAB

Thanks.

> > I also recommend using Emacs
> > 29.1, which is the latest version that is still being maintained.
> 
> Indeed, when I start the recipe above with
> 
>   0. Use Ubuntu 23.10 (which has emacs 29.1).
> 
> the completion windows stays open. No bug there.
> 
> You can close the ticket.

Thanks, done.