Re: master f92520d009e 1/2: Don't pause display for pending input

[Eli Zaretskii <eliz@gnu.org>]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: emacs-devel@gnu.org,  Gerd Möllmann <gerd@gnu.org>
> Date: Thu, 19 Dec 2024 13:24:41 +0100
> 
> Andrea Corallo <acorallo@gnu.org> writes:
> 
> > And with --enable-checking=all --enable-check-lisp-object-type --with-native-compilation=yes
> >
> > =======
> > In file included from dispnew.c:27:
> > In function ‘PSEUDOVECTORP’,
> >     inlined from ‘FRAMEP’ at lisp.h:3343:10,
> >     inlined from ‘FRAME_PARENT_FRAME’ at frame.h:1236:42,
> >     inlined from ‘root_frame’ at dispnew.c:3340:10,
> >     inlined from ‘is_in_matrix’ at dispnew.c:3877:24,
> >     inlined from ‘is_cursor_obscured’ at dispnew.c:3898:8,
> >     inlined from ‘terminal_cursor_magic’ at dispnew.c:3917:7,
> >     inlined from ‘combine_updates_for_frame’ at dispnew.c:3970:5:
> > lisp.h:1096:68: warning: null pointer dereference [-Wnull-dereference]
> >  1096 |           && ((XUNTAG (a, Lisp_Vectorlike, union vectorlike_header)->size
> >       |                                                                    ^
> > =======
> >
> This one I don't see here, with clang 19. And I must admit I don't
> understand it what it is complaining about. The function root_frame
> is pretty simple:
> 
>   struct frame *
>   root_frame (struct frame *f)
>   {
>     while (FRAME_PARENT_FRAME (f))
>       f = FRAME_PARENT_FRAME (f);
>     return f;
>   }
> 
> and FRAME_PARENT_FFAME is
> 
>   INLINE struct frame *
>   FRAME_PARENT_FRAME (struct frame *f)
>   {
>     return NILP (f->parent_frame) ? NULL : XFRAME (f->parent_frame);
>   }
> 
> Any idea?

I think it wants to tell you that the argument F of FRAME_PARENT_FRAME
could be NULL.