GNU bug report logs - #78444
30.1; Crash in GC (vector_marked_p)

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Message #89 received at 78444 <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: George P <georgepanagopo <at> gmail.com>, Pip Cet <pipcet <at> protonmail.com>
Cc: Eli Zaretskii <eliz <at> gnu.org>, acorallo <at> gnu.org, 78444 <at> debbugs.gnu.org
Subject: Re: bug#78444: 30.1; Crash in GC (vector_marked_p)
Date: Mon, 16 Jun 2025 09:25:57 +0200

> Yes, it was the latter, i.e.
>
>        if (update_miniwindow_p)
> {
>   Lisp_Object mini_window = FRAME_MINIBUF_WINDOW (sf);
>
>   displayed_buffer = XBUFFER (XWINDOW (mini_window)->contents);
> 17526 : internal_condition_case_1 (redisplay_window_1, mini_window,
>      list_of_error,
>      redisplay_window_error);
> }

Can you try

diff --git a/src/window.c b/src/window.c
index 1ac004af5e0..28ee8bc4035 100644
--- a/src/window.c
+++ b/src/window.c
@@ -303,6 +303,9 @@ wset_buffer (struct window *w, Lisp_Object val)
     /* Make sure that we do not assign the buffer
        to an internal window.  */
     eassert (MARKERP (w->start) && MARKERP (w->pointm));
+  else
+    eassert (!w->mini);
+
   w->contents = val;
   adjust_window_count (w, 1);
 }

and get us a backtrace when it's hit.

martin

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