bug#73752: 29.4; Ligatures are randomly rendered with extra spaces

[Eli Zaretskii <eliz@gnu.org>]

> Cc: 73752@debbugs.gnu.org
> Date: Wed, 30 Oct 2024 17:12:33 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: Tim Ruffing <dev@real-or-random.org>
> > Date: Wed, 30 Oct 2024 00:14:58 +0100
> > 
> > I've just managed to reproduce this again, and I've attached gdb, but
> > I'm also stuck at pp doesn't displaying:
> > (gdb) pp composition_gstring_from_id(19)
> > (gdb) p composition_gstring_from_id(19)
> > $6 = (struct Lisp_X *) 0x58ad4d938225
> > (gdb) xpr
> > Lisp_Vectorlike
> > PVEC_NORMAL_VECTOR
> > $7 = (struct Lisp_Vector *) 0x58ad4d938220
> > {XIL(0x58ad4f32aabd), make_fixnum(19), XIL(0x58ad4d93f8e5),
> > XIL(0x58ad4d93f93d), XIL(0x58ad4d93f995)}
> 
> Paul, any ideas why pp would fail to work?  I never say anything like
                                                      ^^^
"saw"

> that, but maybe external-debugging-output doesn't work when GDB is
> attached to a running Emacs?
> 
> 
> 
>