[Bug 268752] emacs-devel and emacs freeze when attepmitng to show the multi-lingual hello (C-h h) page

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268752

            Bug ID: 268752
           Summary: emacs-devel and emacs freeze when attepmitng to show
                    the multi-lingual hello (C-h h) page
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: ddg01nb@duck.com

Both emacs 28.2 and emacs-devel 20230101.3, either installed via pkg or ports,
freeze/hang when I attemp to show the multi-lingual hello page (Control-h h)
under GUI enviroment (either gtk/x11 or pgtk/wayland).  If I launch emacs under
TUI (e.g. run emacs with command "emcas -nw"), C-h h does not freeze emacs. 


I tried to install emacs-devel configured with Xft/Xaw3d enabled and cairo/gtk
disabled, this alternative build does not have the C-h h freeze problem. So it
seems that something in FreeBSD's gtk/pango/otf/cairo/emacs ports causes this
problem, as Linux (tested on Debian and Fedora) does not have this C-h h freeze
problem. 

Steps to reproduce the bug:

1. Install emacs-devel or emacs, via pkg or ports 
2. In a wayland or X11 session, launch emacs with command: emacs -Q 
3. In Emacs window, type C-h h keybinding
4. Emacs freezes, with high CPU usage.


Thanks, 
LKG.

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