GNU bug report logs - #72986
Disabling menu-bar-mode changes size of new frames

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From: Po Lu <luangruo <at> yahoo.com>
To: Reuben Thomas <rrt <at> sc3d.org>
Cc: martin rudalics <rudalics <at> gmx.at>, Eli Zaretskii <eliz <at> gnu.org>, 72986 <at> debbugs.gnu.org
Subject: bug#72986: Disabling menu-bar-mode changes size of new frames
Date: Wed, 04 Sep 2024 20:12:28 +0800

Reuben Thomas <rrt <at> sc3d.org> writes:

> On Wed, 4 Sept 2024 at 09:02, martin rudalics <rudalics <at> gmx.at> wrote:
>
>   >>
>   >> gtk_distribute_natural_allocation: assertion 'extra_space >= 0' failed
>   >>
>   >
>   > Yes, both with Emacs 29 and git master produce this message when
>   > menu-bar-mode is non-nil, and the menu bar is drawn, in both window sizes
>   > (the normal sized window, and the strangely small one).
>
>  But you can't see this message when building with gtk-2 I presume.
>
> That's correct, no message with gtk-2.
>
>  This strongly hints that there was an Emacs change affecting gtk-2 _and_
>  gtk-3 builds in between 29 and master.  I could imagine that commit
>
>  e087c89b1e243bbd941a4a50b4bf99613e13d016
>
>  is involved but if you could try to bisect, it would be of great help.
>
> Just to check, you're suggesting that I bisect from emacs-29.3 (I use
> that tag because it's what the version of 29 I'm using is built from)
> to master HEAD, to find at which commit C-x 5 2 opens a small window
> immediately (without disabling menu-bar-mode)?

If it is this bug that you are trying to isolate, we have already heard
reports of its being reproducible all the way to Emacs 26.1, and
concluded that it is a product of a change in the Mutter window manager.

Too bad I'm only personally interested in the no toolkit and Motif
builds and cannot set aside the time to investigate these GTK issues at
this time.

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