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bug#21132: 25.0.50; Emacs on Windows crashes evaluating x-frame-geometry


From: Eli Zaretskii
Subject: bug#21132: 25.0.50; Emacs on Windows crashes evaluating x-frame-geometry in batch mode
Date: Mon, 27 Jul 2015 19:25:33 +0300

> Date: Mon, 27 Jul 2015 18:02:38 +0200
> From: martin rudalics <address@hidden>
> CC: address@hidden, address@hidden
> 
>  >>   >> And do we prefer (FRAME_W32_WINDOW (f) != 0) to (!FRAME_W32_WINDOW 
> (f))?
>  >>   >
>  >>   > We prefer !FRAME_W32_P (f)
>  >>
>  >> x_set_foreground_color, x_set_background_color and x_set_mouse_color use
>  >>
>  >> if (FRAME_W32_WINDOW (f) != 0)
>  >>
>  >> Should these be changed?
>  >
>  > No, I don't think so, because these are handlers for w32 frame
>  > parameters, and I see no way they could be called from Lisp, except in
>  > that context.  Am I missing something?
> 
> No.  I asked because of your preference stated above.  Although in all
> the cases I cited we probably just care about whether the frame exists
> at all.  Yet I would feel better with a more stringent predicate that
> would combine say, FRAME_W32_WINDOW and FRAME_W32_P.

When FRAME_W32_P returns false, FRAME_W32_WINDOW will crash.





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