Question about last_nonminibuf_frame

Question about last_nonminibuf_frame

[Gerd Möllmann]

This variable of type struct frame * is not staticpro'd (it's not a
Lisp_Objecz, so it can't be, technically. Strictly speaking, the
variable can point to a frame that doesn't exist anymore, and can be
passed to Elisp via a call to last-nonminibuffer-frame.

Question is: shouldn't something be done about this?

(Tripped over this with MPS, because frames are Lisp objects, which
can nove in memory.)

Re: Question about last_nonminibuf_frame

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Date: Fri, 19 Apr 2024 14:26:18 +0200
> 
> This variable of type struct frame * is not staticpro'd (it's not a
> Lisp_Objecz, so it can't be, technically. Strictly speaking, the
> variable can point to a frame that doesn't exist anymore, and can be
> passed to Elisp via a call to last-nonminibuffer-frame.
> 
> Question is: shouldn't something be done about this?

AFAICT, delete_frame makes sure last_nonminibuf_frame cannot be a
non-existent frame.

Re: Question about last_nonminibuf_frame

[Gerd Möllmann]

Thanks

Sent from my iPhone

> On 19. Apr 2024, at 16:26, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> 
>> 
>> From: Gerd Möllmann <gerd.moellmann@gmail.com>
>> Date: Fri, 19 Apr 2024 14:26:18 +0200
>> 
>> This variable of type struct frame * is not staticpro'd (it's not a
>> Lisp_Objecz, so it can't be, technically. Strictly speaking, the
>> variable can point to a frame that doesn't exist anymore, and can be
>> passed to Elisp via a call to last-nonminibuffer-frame.
>> 
>> Question is: shouldn't something be done about this?
> 
> AFAICT, delete_frame makes sure last_nonminibuf_frame cannot be a
> non-existent frame.