Avoid rare segfaults in 'combine_updates_for_frame'

* src/xdisp.c (redisplay_internal): Don't add to 'tty_root_frames'
frames that are not yet completely made.  (Bug#77046)

(cherry picked from commit 412a6fad98e768000dfe9538179889d6faeaa97a)

diff --git a/src/xdisp.c b/src/xdisp.c
index 89e8841d8214dfbcd9d7ef2f250b2fc4c099da71..11cffce1cbebe1c17197e86a3eeed993952171f8 100644 (file)
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -17569,7 +17569,10 @@ redisplay_internal (void)
          if (is_tty_frame (f))
            {
              /* Ignore all invisible tty frames, children or root.  */
-             if (!frame_redisplay_p (f))
+             if (!frame_redisplay_p (f)
+                 /* Ignore frames not yet completely made, which we
+                    cannot safely redisplay.  */
+                 || !f->after_make_frame)
                continue;
 
              /* Remember tty root frames which we've seen.  */